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                                                                    EXHIBIT 99.5






             SUBSCRIPTION, JOINT DEVELOPMENT AND OPERATING AGREEMENT




                        ELAN PHARMA INTERNATIONAL LIMITED


                        ELAN INTERNATIONAL SERVICES, LTD.


                                       AND


                            ATRIX LABORATORIES, INC.



                                       AND


                              ATRIX NEWCO, LIMITED




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                                      INDEX


         
CLAUSE 1    DEFINITIONS

CLAUSE 2    NEWCO'S BUSINESS

CLAUSE 3    REPRESENTATIONS AND WARRANTIES

CLAUSE 4    AUTHORIZATION AND CLOSING

CLAUSE 5    DIRECTORS; MANAGEMENT AND R&D COMMITTEES

CLAUSE 6    THE BUSINESS PLAN AND REVIEWS

CLAUSE 7    RESEARCH AND DEVELOPMENT

CLAUSE 8    COMMERCIALIZATION

CLAUSE 9    OWNERSHIP OF INTELLECTUAL PROPERTY RIGHTS

CLAUSE 10   INTELLECTUAL PROPERTY RIGHTS

CLAUSE 11   CROSS LICENSING/EXPLOITATION OF PRODUCTS OUTSIDE FIELD

CLAUSE 12   REGULATORY

CLAUSE 13   MANUFACTURING

CLAUSE 14   TECHNICAL SERVICES AND ASSISTANCE

CLAUSE 15   AUDITORS, BANKERS,
                        ACCOUNTING REFERENCE DATE; SECRETARY

CLAUSE 16   TRANSFER OF SHARES; RIGHTS OF FIRST OFFER; TAG ALONG RIGHTS

CLAUSE 17   MATTERS REQUIRING STOCKHOLDERS' APPROVAL

CLAUSE 18   DISPUTES




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CLAUSE 19   TERMINATION

CLAUSE 20   SHARE RIGHTS

CLAUSE 21   CONFIDENTIALITY

CLAUSE 22   COSTS

CLAUSE 23   GENERAL




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THIS SUBSCRIPTION, JOINT DEVELOPMENT AND OPERATING AGREEMENT made this 18 day of
July, 2000

BETWEEN:

(1)      ELAN PHARMA INTERNATIONAL LIMITED, a private limited company
         incorporated under the laws of Ireland, and having its registered
         office at WIL House, Shannon Business Park, Shannon, County Clare,
         Ireland ("EPIL");

(2)      ELAN INTERNATIONAL SERVICES, LTD., a Bermuda exempted limited liability
         company incorporated under the laws of Bermuda, and having its
         registered office at Clarendon House, 2 Church St., Hamilton, Bermuda
         ("EIS");

(3)      ATRIX LABORATORIES, INC., a corporation duly incorporated and validly
         existing under the laws of State of Delaware and having its principal
         place of business at 2579 Midpoint Drive, Fort Collins, CO 80525-4417,
         United States of America.

(4)      ATRIX NEWCO, LIMITED a Bermuda exempted limited liability company
         incorporated under the laws of Bermuda, and having its registered
         office at Clarendon House, 2 Church St., Hamilton, Bermuda ("NEWCO").

                                    RECITALS:

A.       Newco desires to issue and sell to the Stockholders (as defined below),
         and the Stockholders desire to purchase from Newco, for aggregate
         consideration of $15,000,000, apportioned between them as set forth
         herein, (i) 6,000 ordinary shares of Newco's common stock, par value
         $1.00 per share (the "COMMON STOCK"), allocated to Atrix, and (ii)
         6,000 shares of Newco's preferred stock, par value $1.00 per share (the
         "PREFERRED STOCK"), allocated 3,612 Shares to Atrix and 2,388 Shares to
         EIS.

B.       As of the Closing Date, EPIL, has entered into a license agreement with
         Newco, and Atrix has entered into a license agreement with Newco, in
         connection with the license to Newco of the Elan Intellectual Property
         and the Atrix Intellectual Property, respectively (each as defined
         below).

C.       Elan and Atrix have agreed to co-operate in the research, development
         and commercialization of the Products (as defined below) based on their
         respective technologies.



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D.       Elan and Atrix have agreed to enter into this Agreement for the purpose
         of recording the terms and conditions regulating their relationship
         with each other, with respect to the Licensed Technologies and with
         Newco.

NOW IT IS HEREBY AGREED AS FOLLOWS:

                                    CLAUSE 1

                                   DEFINITIONS

1.1      In this Agreement, the following terms shall, where not inconsistent
         with the context, have the following meanings respectively.

         "AFFILIATE" of any Person (in the case of a legal entity) shall mean
         any other Person controlling, controlled or under the common control of
         such first Person, as the case may be. For the purposes of this
         definition, "control" shall mean direct or indirect ownership of fifty
         percent (50%) or more of the stock or shares entitled to vote for the
         election of directors and "controlling" and "controlled" shall be
         construed accordingly. Newco is not an Affiliate of Elan or EIS.

         "AGREEMENT" shall mean this agreement (which expression shall be deemed
         to include the Recitals and the Schedules hereto).

         "ATRIGEL(R)TECHNOLOGY" shall mean Atrix's proprietary [**].

         "ATRIX DIRECTORS" has the meaning set forth in Clause 5.

         "ATRIX IMPROVEMENTS" has the meaning assigned thereto in the Atrix
         License Agreement.

         "ATRIX INTELLECTUAL PROPERTY" has the meaning assigned thereto in the
         Atrix License Agreement.

         "ATRIX KNOW-HOW" has the meaning assigned thereto in the Atrix License
         Agreement.

         "ATRIX LICENSE AGREEMENT" shall mean the license agreement between
         Atrix and Newco, of even date herewith, attached hereto in Schedule 2.

         "ATRIX PATENTS" has the meaning assigned thereto in the Atrix License
         Agreement.

         "ATRIX SECURITIES PURCHASE AGREEMENT" shall mean that certain
         Securities Purchase Agreement, of even date herewith, by and between
         Atrix and EIS.



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         "BEMA(TM)TECHNOLOGY" shall mean Atrix's proprietary [**]

         "BOARD" shall mean the board of directors of Newco.

         "BUSINESS" shall mean the business specified in the Business Plan.

         "BUSINESS PLAN" shall mean the business plan and program of development
         to be agreed by Elan and Atrix pursuant to Clause 6, with respect to
         the research, development, and commercialization of the Products that
         shall contain, among other things, to the extent practicable, the
         research and development objectives, desired Product specifications,
         clinical indications, preliminary clinical trial designs (Phase I/II),
         development timelines, budgeted costs and the relative responsibilities
         of Atrix and Elan as it relates to the implementation of the R&D Plan.

         "CERTIFICATE OF DESIGNATIONS" shall mean that certain certificate of
         designations, preferences and rights of Series A Preferred Stock of
         Atrix issued on the Closing Date.

         "CLOSING DATE" shall mean the date upon which the Definitive Documents
         are executed and delivered by the Parties and the transactions effected
         thereby are closed.

         "COMMON STOCK EQUIVALENTS" shall mean any options, warrants, rights or
         any other securities convertible, exercisable or exchangeable, in whole
         or in part, for or into Common Stock.

         "COMPOUNDS" shall mean the compounds, up to a maximum of three, which
         shall be nominated and approved by the Management Committee in
         accordance with Clause 2 of this Agreement.

         "CONVERTIBLE NOTE" shall mean that certain convertible promissory note,
         of even date herewith, by and between Atrix and EIS.

         "DEFINITIVE DOCUMENTS" shall mean this Agreement, the Elan License
         Agreement, the Atrix License Agreement, the Convertible Note, the Atrix
         Securities Purchase Agreement, the Registration Rights Agreements, the
         Certificate of Designations and associated documentation of even date
         herewith, by and between Atrix, Elan, EIS and Newco, as applicable.

         "DIRECTORS" shall mean, at any time, the directors of Newco.

         "EIS DIRECTOR" has the meaning set forth in Clause 5.

         "ELAN" shall mean EPIL and Affiliates and subsidiaries of Elan
         Corporation, plc. within the division of Elan Corporation, plc.
         carrying on business as Elan



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         Pharmaceutical Technologies but shall not include The Liposome Company,
         Inc. and its subsidiaries, Axogen Limited and Neuralab Limited and
         Affiliates and subsidiaries (present or future) of Elan Corporation
         plc. within the division of Elan Pharmaceuticals which incorporates,
         inter alia, EPIL (to the extent that EPIL is the owner of patents,
         know-how or other intellectual property or technology invented and/or
         developed within the division of Elan Corporation, plc carrying on
         business as Elan Pharmaceuticals), Athena Neurosciences, Inc., Elan
         Pharmaceuticals, Inc. and Elan Europe Limited.

         "ELAN IMPROVEMENTS" has the meaning assigned thereto in the Elan
         License Agreement.

         "ELAN INTELLECTUAL PROPERTY" has the meaning assigned thereto in the
         Elan License Agreement.

         "ELAN KNOW-HOW" has the meaning assigned thereto in the Elan License
         Agreement.

         "ELAN LICENSE AGREEMENT" shall mean the license agreement between Elan
         and Newco, of even date herewith, attached hereto in Schedule 1.

         "ELAN PATENT RIGHTS" shall mean has the meaning assigned thereto in the
         Elan License Agreement.

         "ENCUMBRANCE" shall mean any liens, charges, encumbrances, equities,
         claims, options, proxies, pledges, security interests, or other similar
         rights of any nature.

         "EXCHANGE RIGHT" has the meaning assigned to such term in the
         Certificate of Designations in effect on the Closing Date.

         "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, as
         amended.

         "FDA" shall mean the United States Food and Drug Administration or any
         other successor agency in the USA.

         "FIELD" shall mean the administration of the Products for pain
         management or oncology indications.

         "FINANCIAL YEAR" shall mean each year commencing on January 1 (or in
         the case of the first Financial Year, the Closing Date) and expiring on
         December 31 of each year.

         "FULLY DILUTED COMMON STOCK" shall mean all of the issued and
         outstanding Common Stock, assuming the conversion, exercise or exchange
         of all outstanding Common Stock Equivalents.



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         "LICENSE AGREEMENTS" shall mean the Elan License Agreement and the
         Atrix License Agreement.

         "LICENSED TECHNOLOGIES" shall mean, collectively, the Elan Intellectual
         Property and the Atrix Intellectual Property.

         "NEWCO INTELLECTUAL PROPERTY" shall mean all rights to patents,
         know-how and other intellectual property arising during and as a direct
         result of the conduct of the Project by any person, including any
         technology acquired by Newco from a third party, that does not
         constitute either Elan Intellectual Property or Atrix Intellectual
         Property. For the avoidance of doubt, patents, know-how and other
         intellectual property, including all pre-clinical and clinical trial,
         on the Products, and all correspondence with and submissions to
         government agencies for marketing or other regulatory approval of the
         Products shall be deemed Newco Intellectual Property.

         "NEWCO BYE-LAWS" shall mean the Memorandum of Association and Bye-Laws
         of Newco.

         "PARTICIPANT" shall mean Atrix or Elan, as the case may be, and
         "PARTICIPANTS" shall mean both of the Participants together;

         "PARTY" shall mean Elan, Atrix, or Newco, as the case may be, and
         "PARTIES" shall mean all such parties together;

         "PERSON" shall mean an individual, partnership, corporation, limited
         liability company, business trust, joint stock company, trust,
         unincorporated association, joint venture, governmental entity or
         authority or other entity of whatever nature.

         "PERMITTED TRANSFEREE" shall mean any Affiliate or subsidiary of Elan,
         EIS or Atrix, to whom this Agreement may be assigned, in whole or in
         part, pursuant to the terms hereof or in the case of Elan, EPIL, EIS, a
         special purpose financing entity created by Elan or EIS.

         "PRODUCTS" shall mean formulations of the Compounds utilizing, in no
         particular order, (i) the Atrigel(R) Technology or BEMA(TM) Technology,
         (ii) the NanoCrystal(TM) Technology and the BEMA(TM) Technology, or
         (iii) the NanoCrystal(TM) Technology and the Atrigel(R) Technology, as
         developed by or on behalf of Newco pursuant to the Project.

         "PROJECT" shall mean all activities as undertaken by Elan, Atrix and
         Newco in order to develop the Products.

         "REGISTRATION RIGHTS AGREEMENTS" shall mean the Registration Rights
         Agreements of even date herewith relating to Newco and Atrix,
         respectively.



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         "REGULATORY APPLICATION" shall mean any regulatory application or any
         other application for marketing approval for a Product, which Newco
         will file in any country of the Territory, including any supplements or
         amendments thereto.

         "REGULATORY APPROVAL" shall mean the final approval to market a Product
         in any country of the Territory, and any other approval which is
         required to launch the Product in the normal course of business.

         "RESEARCH AND DEVELOPMENT TERM" shall mean the period of [**] months
         immediately following the Closing Date.

         "RHA" shall mean any relevant government health authority (or successor
         agency thereof) in any country of the Territory whose approval is
         necessary to market a Product in the relevant country of the Territory.

         "SECURITIES ACT" shall mean the Securities Act of 1933, as amended.

         "SHARES" shall mean the shares of Common Stock and shares of Preferred
         Stock of Newco.

         "STOCKHOLDER" shall mean any of EIS, Atrix, any Permitted Transferee or
         any other Person who subsequently becomes bound by this Agreement as a
         holder of the Shares, and "STOCKHOLDERS" shall mean all of the
         Stockholders together.

         "TECHNOLOGICAL COMPETITOR OF ELAN" has the meaning assigned thereto in
         the Elan License Agreement.

         "TERM" shall mean the term of this Agreement.

         "TERRITORY" shall mean all of the countries of the world.

         "UNITED STATES DOLLAR" and "US$" and "$" shall mean the lawful currency
         of the United States of America.

         "USA" shall mean the United States of America.

1.2      In addition, the following definitions have the meanings in the Clauses
         corresponding thereto, as set forth below.



         DEFINITION                                       CLAUSE

                                                   
         "AAA"                                            18.4
         "Buyout Option"                                  19.3
         "Closing"                                         4.3
         "Common Stock"                                Recital
         "Confidential Information"                       21.1




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         "Co-sale Notice"                                 16.4
         "Expert"                                         18.4
         "Management Committee"                          5.2.1
         "Notice of Exercise"                             16.3
         "Notice of Intention"                            16.3
         "Offered Shares"                                 16.3
         "Offer Price"                                    16.3
         "Preferred Stock"                             Recital
         "Proposing Participant"                          19.3
         "Proposing Participant Price:                    19.5
         "Purchase Price"                                 19.5
         "R&D Committee"                                 5.2.3
         "Recipient Participant"                          19.3
         "Recipient Participant Price"                    19.5
         "Remaining Stockholders"                         16.4
         "Relevant Event"                                 19.2
         "Selling Stockholder"                            16.3
         "Tag-Along Right"                                16.4
         "Transaction Proposal"                           16.3
         "Transfer"                                       16.1
         "Transferee Terms"                               16.4
         "Transferring Stockholder"                       16.4


1.3      Words importing the singular shall include the plural and vice versa.

1.4      Unless the context otherwise requires, reference to a recital, article,
         paragraph, provision, clause or schedule is to a recital, article,
         paragraph, provision, clause or schedule of or to this Agreement.

1.5      Reference to a statute or statutory provision includes a reference to
         it as from time to time amended, extended or re-enacted.

1.6      The headings in this Agreement are inserted for convenience only and do
         not affect its construction.

1.7      Unless the context or subject otherwise requires, references to words
         in one gender include references to the other genders.

1.8      Capitalized terms used but not defined herein shall have the meanings
         ascribed in the Definitive Documents, if defined therein.



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                                    CLAUSE 2

                                    BUSINESS

2.1      The primary objective of the Agreement is to regulate the business of
         the development, testing, registration, manufacture, commercialization
         and licensing of Products in the Territory and to achieve the other
         objectives set out in this Agreement. The focus of the Business will be
         to develop the Products in the Field using the Elan Intellectual
         Property, the Atrix Intellectual Property and the Newco Intellectual
         Property to agreed-upon specifications and timelines.

2.2      The central management and control of Newco shall be exercised in
         Bermuda and shall be vested in the Directors and such Persons as they
         may delegate the exercise of their powers in accordance with the Newco
         Bye-Laws. The Stockholders agree to conduct the Business in such a
         manner as to ensure that Newco is liable to taxation in Bermuda and not
         in any other jurisdiction. The Participants shall use their best
         endeavours to ensure the sole residence of Newco in Bermuda, all
         meetings of the Directors are held in Bermuda or other jurisdictions
         outside the United States and generally to ensure that Newco is treated
         as resident for taxation purposes in Bermuda.

2.3      The focus of the Agreement will be to develop three Products using, in
         no particular order, (i) the Atrigel(R) Technology or BEMA(TM)
         Technology, (ii) the BEMA(TM) Technology and the NanoCrystal(TM)
         Technology, or (iii) the Atrigel(R) Technology and the NanoCrystal(TM)
         Technology, all to agreed upon specifications and timelines. Subject to
         the provisions of Clause 8, Newco shall be responsible for determining
         the subsequent commercialization strategy to allow the Products to be
         marketed in the Territory.

2.4      Within 60 days of the Effective Date or such period as may be agreed by
         the Parties in writing, the Management Committee shall, by unanimous
         agreement, nominate and agree upon up to a maximum of three Compounds
         which should be developed by Newco. The Management Committee shall have
         regard to the following criteria in agreeing upon Compounds for
         development by Newco:-

         2.4.1    market potential of the Compounds, as estimated by the
                  Management Committee;

         2.4.2    development cost of the Compounds, as estimated by the
                  Management Committee; and

         2.4.3    results of intellectual property due diligence primarily
                  focused on determining whether there are any third party
                  intellectual property issues which might impact the
                  development and marketing of any of the Compounds in the
                  Territory.



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2.5      The selection of the Compounds shall be subject to, inter alia, the
         then existing contractual arrangements of Elan and Atrix and such
         discussions as Elan or Atrix are having with one or more third parties
         at the time of such selection. Nothing in this Clause 2 shall restrict
         the ability of Elan or Atrix to pursue discussions or enter into
         agreements with one or more third parties so long as mutual agreement
         has not been reached regarding the Compounds.

2.6      Should any of the Compounds fail to meet agreed specifications or the
         results of the review under Clause 2.4 or reveal third party
         intellectual property issues which might materially impact the
         development and marketing of a Product, the Management Committee shall
         terminate the portion of the Project that relates to such Compound(s)
         and shall review in good faith the nomination by Newco of additional
         Compound(s). In such case, the Parties shall negotiate in good faith
         such amendments as are required to the Definitive Documents, such as
         amending the provisions regulating non-competition.

                                    CLAUSE 3

                         REPRESENTATIONS AND WARRANTIES

3.1      REPRESENTATIONS AND WARRANTIES OF NEWCO: Newco hereby represents and
         warrants to each of the Stockholders as follows, as of the Closing
         Date:

         3.1.1    ORGANIZATION: Newco is an exempted company duly organized,
                  validly existing and in good standing under the laws of
                  Bermuda, and has all the requisite corporate power and
                  authority to own and lease its properties, to carry on its
                  business as presently conducted and as proposed to be
                  conducted.

         3.1.2    CAPITALIZATION: As of the Closing Date, the authorized capital
                  stock of Newco consists of 6,000 shares of Common Stock and
                  6,000 shares of Preferred Stock. Prior to the Closing Date, no
                  shares of capital stock of Newco have been issued.

         3.1.3    AUTHORIZATION: The execution, delivery and performance by
                  Newco of this Agreement, including the issuance of the Shares,
                  have been duly authorized by all requisite corporate actions;
                  this Agreement has been duly executed and delivered by Newco
                  and is the valid and binding obligation of Newco, enforceable
                  against it in accordance with its terms except as limited by
                  applicable bankruptcy, insolvency, reorganization, moratorium
                  and other laws of general application affecting the
                  enforcement of creditors' rights generally, and except as
                  enforcement of rights to indemnity and contribution hereunder
                  may be limited by United States federal or state securities
                  laws or principles of public policy. The Shares, when issued
                  as contemplated hereby, will be validly issued and



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                  outstanding, fully paid and non-assessable and not subject to
                  pre-emptive or any other similar rights of the Stockholders or
                  others.

         3.1.4    NO CONFLICTS: The execution, delivery and performance by Newco
                  of this Agreement, the issuance, sale and delivery of the
                  Shares, and compliance with the provisions hereof by Newco,
                  will not:

                  (i)      violate any provision of applicable law, statute,
                           rule or regulation applicable to Newco or any ruling,
                           writ, injunction, order, judgment or decree of any
                           court, arbitrator, administrative agency or other
                           governmental body applicable to Newco or any of its
                           properties or assets;

                  (ii)     conflict with or result in any breach of any of the
                           terms, conditions or provisions of, or constitute
                           (with notice or lapse of time or both) a default (or
                           give rise to any right of termination, cancellation
                           or acceleration) under its charter or organizational
                           documents or any material contract to which Newco is
                           a party, except where such violation, conflict or
                           breach would not, individually or in the aggregate,
                           have a material adverse effect on Newco; or

                  (iii)    result in the creation of, any Encumbrance upon any
                           of the properties or assets of Newco.

         3.1.5    APPROVALS: As of the Closing Date, no permit, authorization,
                  consent or approval of or by, or any notification of or filing
                  with, any Person is required in connection with the execution,
                  delivery or performance of this Agreement by Newco. Newco has
                  full authority to conduct its business as contemplated in the
                  Business Plan and the Definitive Documents.

         3.1.6    DISCLOSURE: This Agreement does not contain any untrue
                  statement of a material fact or omit to state any material
                  fact necessary to make the statements contained herein not
                  misleading. Newco is not aware of any material contingency,
                  event or circumstance relating to its business or prospects,
                  which could have a material adverse effect thereon, in order
                  for the disclosure herein relating to Newco not to be
                  misleading in any material respect.

         3.1.7    NO BUSINESS; NO LIABILITIES: Newco has not conducted any
                  business or incurred any liabilities or obligations prior to
                  the Closing Date, except solely in connection with its
                  organization and formation.



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3.2      REPRESENTATIONS AND WARRANTIES OF THE STOCKHOLDERS: Each of the
         Stockholders hereby severally represents and warrants to Newco as
         follows as of the Closing Date:

         3.2.1    ORGANIZATION: Such Stockholder is a corporation duly organized
                  and validly existing under the laws of its jurisdiction of
                  organization and has all the requisite corporate power and
                  authority to own and lease its respective properties, to carry
                  on its respective business as presently conducted and as
                  proposed to be conducted and to carry out the transactions
                  contemplated hereby.

         3.2.2    AUTHORITY: Such Stockholder has full legal right, power and
                  authority to enter into this Agreement and to perform its
                  obligations hereunder, which have been duly authorized by all
                  requisite corporate action. This Agreement is the valid and
                  binding obligation of such Stockholder, enforceable against it
                  in accordance with its terms except as limited by applicable
                  bankruptcy, insolvency, reorganization, moratorium and other
                  laws of general application affecting the enforcement of
                  creditors' rights generally, and except as enforcement of
                  rights to indemnity and contribution hereunder may be limited
                  by United States federal or state securities laws or
                  principles of public policy.

         3.2.3    NO CONFLICTS: The execution, delivery and performance by such
                  Stockholder of this Agreement, purchase of the Shares, and
                  compliance with the provisions hereof by such Stockholder will
                  not:

                  (i)     violate any provision of applicable law, statute,
                          rule or regulation known by and applicable to such
                          Stockholder or any ruling, writ, injunction, order,
                          judgment or decree of any court, arbitrator,
                          administrative agency or other governmental body
                          applicable to such Stockholder or any of its
                          properties or assets;

                  (ii)    conflict with or result in any breach of any of the
                          terms, conditions or provisions of, or constitute
                          (with notice or lapse of time or both) a default (or
                          give rise to any right of termination, cancellation or
                          acceleration) under the charter or organizational
                          documents of such Stockholder or any material contract
                          to which such Stockholder is a party, except where
                          such violation, conflict or breach would not,
                          individually or in the aggregate, have a material
                          adverse effect on such Stockholder; or

                  (iii)   except as contemplated by the Definitive Documents,
                          result in the creation of, any Encumbrance upon any of
                          the properties or assets of such Stockholder.



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         3.2.4    APPROVALS: As of the Closing Date, no permit, authorization,
                  consent or approval of or by, or any notification of or filing
                  with, any Person is required in connection with the execution,
                  delivery or performance of this Agreement by such Stockholder
                  except for filings required under the Securities Act or the
                  Exchange Act, under the rules of NASDAQ or under the Delaware
                  General Corporation Law.

         3.2.5    INVESTMENT REPRESENTATIONS: Such Stockholder is sophisticated
                  in transactions of this type and capable of evaluating the
                  merits and risks of its investment in Newco. Such Stockholder
                  has not been formed solely for the purpose of making this
                  investment and such Stockholder is acquiring the Common Stock
                  and Preferred Stock for investment for its own account, not as
                  a nominee or agent, and not with the view to, or for resale in
                  connection with, any distribution of any part thereof. Such
                  Stockholder understands that the Shares have not been
                  registered under the Securities Act or applicable state and
                  foreign securities laws by reason of a specific exemption from
                  the registration provisions of the Securities Act and
                  applicable state and foreign securities laws, the availability
                  of which depends upon, among other things, the bona fide
                  nature of the investment intent and the accuracy of such
                  Stockholders' representations as expressed herein. Such
                  Stockholder understands that no public market now exists for
                  any of the Shares and that there is no assurance that a public
                  market will ever exist for such Shares.

                                    CLAUSE 4

                            AUTHORIZATION AND CLOSING

4.1      Newco has authorized the issuance to (i) EIS of 2,388 shares of
         Preferred Stock and (ii) Atrix of 6,000 shares of Common Stock and
         3,612 shares of Preferred Stock, issuable as provided in Clause 4.4
         hereof.

4.2      Atrix and EIS hereby subscribe for the number of Shares set forth in
         Clause 4.1 and shall pay to Newco in consideration therefore, by wire
         transfer of immediately available funds (to a bank account established
         by Newco in connection with the Closing) the subscription amounts each
         as provided in Clause 4.4.1.

4.3      The closing (the "CLOSING") shall take place at the offices of Brock
         Silverstein LLC at 800 Third Avenue, New York, New York 10022 on the
         Closing Date or such other places if any, as the Parties may agree and
         shall occur contemporaneously with the closing under the Atrix
         Securities Purchase Agreement.



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4.4      At the Closing, each of the Stockholders shall take or (to the extent
         within its powers) cause to be taken the following steps at Directors
         and shareholder meetings of Newco, or such other meetings, as
         appropriate:

         4.4.1    Newco shall issue and sell to EIS, and EIS shall purchase from
                  Newco, upon the terms and subject to the conditions set forth
                  herein, 2,388 shares of Preferred Stock for an aggregate
                  purchase price of $2,985,000;

                  Newco shall issue and sell to Atrix, and Atrix shall purchase
                  from Newco, upon the terms and conditions set forth herein,
                  (i) 6,000 shares of Common Stock for an aggregate purchase
                  price of $7,500,000 and (ii) 3,612 shares of Preferred Stock
                  for an aggregate purchase price of $4,515,000;

         4.4.2    the Parties shall execute and deliver to each other, as
                  applicable, certificates in respect of the Common Stock and
                  Preferred Stock described above and any other certificates,
                  resolutions or documents which the Parties shall reasonably
                  require;

         4.4.3    the adoption by Newco of Newco Bye-Laws;

         4.4.4    the appointment of Kevin Insley, Brian G. Richmond, David R.
                  Bethune, Dawn Griffiths and Stephen J. Rossiter as Directors
                  of Newco;

         4.4.5    the resignation of all directors and the secretary of Newco
                  holding office prior to the execution of this Agreement and
                  delivery of written confirmation under seal by each Person so
                  resigning that he has no claim or right of action against
                  Newco and that Newco is not in any way obligated or indebted
                  to him; and

         4.4.6    the transfer to Newco of the share register.

4.5      EXEMPTION FROM REGISTRATION:

         The Shares will be issued under an exemption or exemptions from
         registration under the Securities Act. Accordingly, the certificates
         evidencing the Shares shall, upon issuance, contain the following
         legend:

         THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE
         SECURITIES ACT OF 1933, AS AMENDED, OR ANY SECURITIES LAWS OF A STATE
         OR OTHER JURISDICTION AND MAY NOT UNDER ANY CIRCUMSTANCES BE SOLD,
         TRANSFERRED, OR OTHERWISE DISPOSED OF (OTHER THAN TO AN AFFILIATE OF
         THE ORIGINAL



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         HOLDER OR AS OTHERWISE PERMITTED IN THE AGREEMENT PURSUANT TO WHICH
         THEY WERE ISSUED) EXCEPT PURSUANT TO (i) AN EFFECTIVE REGISTRATION
         STATEMENT UNDER THE SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES
         OR BLUE SKY LAWS, OR (ii) TO THE EXTENT APPLICABLE, RULE 144 UNDER THE
         SECURITIES ACT (OR ANY SIMILAR RULE UNDER THE SECURITIES ACT RELATING
         TO THE DISPOSITION OF SECURITIES) TOGETHER WITH AN OPINION OF COUNSEL
         REASONABLY SATISFACTORY TO THE CORPORATION THAT REGISTRATION IS NOT
         REQUIRED UNDER SUCH ACT OR APPLICABLE STATE SECURITIES LAWS.

4.6      Newco shall use reasonable efforts to file any documents that require
         filing with the Registrar of Companies in Bermuda within the prescribed
         time limits. EIS and Atrix shall provide all reasonable co-operation to
         Newco in relation to the matters set forth in this Clause 4.6.

4.7      In the event that EIS validly exercises the Exchange Right, Newco
         shall, immediately upon such exercise, take all necessary steps to
         ensure that EIS is duly and validly issued and has full legal right,
         title and interest in and to the shares of Preferred Stock covered
         thereby.

         The Parties acknowledge that such Shares have been pledged to EIS
         pursuant to the Atrix Securities Purchase Agreement and that EIS has
         physical possession of such Shares; upon such exercise, EIS shall be
         entitled to keep and retain such shares, which shall be owned by EIS as
         provided above. In connection with the foregoing, Newco and the
         Participants shall take all necessary or appropriate steps to ensure
         such ownership by EIS.

                                    CLAUSE 5

                    DIRECTORS; MANAGEMENT AND R&D COMMITTEES

5.1.     DIRECTORS:

         5.1.1    Prior to the exercise of the Exchange Right, the Board shall
                  be composed of five Directors.

                  Atrix shall have the right to nominate four directors of
                  Newco, ("ATRIX DIRECTORS") and EIS shall have the right to
                  nominate one Director of Newco ("EIS DIRECTOR") which
                  Director, save as further provided herein, shall only be
                  entitled to 15% of the votes of the Board. To the extent
                  required by applicable Bermuda law, in the event that the EIS
                  Director is



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                  not a resident of Bermuda, at least one Atrix Director shall
                  be a resident of Bermuda.

                  In the event that the Exchange Right is exercised by EIS
                  within 2 years following the Closing Date, the EIS Director
                  shall only be entitled to 15% of the votes of the Board until
                  the expiry of 2 years from the Closing Date.

                  In the event that the Exchange Right is exercised by EIS at
                  any time after two years following the Closing Date or upon
                  the expiry of 2 years following the Closing Date where the
                  Exchange Right has been exercised by EIS within 2 years
                  following the Closing Date, each of Atrix, and EIS shall cause
                  the Board to be reconfigured so that an equal number of
                  Directors are designated by EIS and Atrix and that each of the
                  Directors has equal voting power.

         5.1.2    If EIS removes the EIS Director, or Atrix removes any of the
                  Atrix Directors, EIS or Atrix, as the case may be, shall
                  indemnify the other Stockholder against any claim by such
                  removed Director arising from such removal.

         5.1.3    The Directors shall meet not less than three times in each
                  Financial Year and all Board meetings shall be held in Bermuda
                  to the extent required pursuant to the laws of Bermuda or to
                  ensure the sole residence of Newco in Bermuda.

         5.1.4    At any such meeting, the presence of the EIS Director and at
                  least two of the Atrix Directors shall be required to
                  constitute a quorum and, subject to Clause 17 hereof, the
                  affirmative vote of a majority of the Directors present at a
                  meeting (in person or by telephone) at which such a quorum is
                  present shall constitute an action of the Directors. In the
                  event of any meeting being inquorate, the meeting shall be
                  adjourned for a period of seven days. A notice shall be sent
                  to the EIS Director and the Atrix Directors specifying the
                  date, time and place where such adjourned meeting is to be
                  held and reconvened.

         5.1.5    On the Closing Date, Atrix may appoint one of the Atrix
                  Directors to be the chairman of Newco. The chairman of Newco
                  shall hold office until:

                  (i)      the first meeting of the Board following the exercise
                           by EIS of the Exchange Right, where the Exchange
                           Right has been exercised by EIS after two years
                           following the Closing Date; or

                  (ii)     the first meeting of the Board following the expiry
                           of 2 years following the Closing Date where the
                           Exchange Right has been exercised by EIS within 2
                           years following the Closing Date



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                  (in each case the "CHAIRMAN STATUS BOARD MEETING"),

                  After the Chairman Status Board Meeting, each of EIS and
                  Atrix, beginning with EIS at the Chairman Status Board
                  Meeting, shall have the right, exercisable alternatively, of
                  nominating one Director to be chairman of Newco for a term of
                  one year.

                  If the chairman is unable to attend any meeting of the Board
                  held prior to the Chairman Status Board Meeting, the Atrix
                  Directors shall be entitled to appoint another Atrix Director
                  to act as chairman in his place at the meeting.

                  If the chairman of Newco is unable to attend any meeting of
                  the Board held after the Chairman Status Board Meeting, the
                  Directors shall be entitled to appoint another Director to act
                  as chairman of Newco in his place at the meeting.

         5.1.6    In case of an equality of votes at a meeting of the Board, the
                  chairman of Newco shall not be entitled to a second or casting
                  vote. In the event of continued deadlock, the Board shall
                  resolve the deadlock pursuant to the provisions set forth in
                  Clause 18.

5.2      MANAGEMENT AND R&D COMMITTEES:

         5.2.1    Newco's board of directors shall appoint a management
                  committee (the "MANAGEMENT COMMITTEE") to consist initially of
                  four members, two of whom shall be nominated by Elan and two
                  of whom shall be nominated by Atrix, and each of whom shall be
                  entitled to one vote, whether or not present at any Management
                  Committee meeting. Decisions of the Management Committee shall
                  require approval of at least one Elan nominee on the
                  Management Committee and one Atrix nominee on the Management
                  Committee.

         5.2.2    Each of Elan and Atrix shall be entitled to remove any of its
                  nominees to the Management Committee and appoint a replacement
                  in place of any nominees so removed. The number of members of
                  the Management Committee may be altered if agreed to by a
                  majority of the directors of Newco; provided that, each of
                  Elan and Atrix shall be entitled to appoint an equal number of
                  members to the Management Committee. The Management Committee
                  shall be responsible for, inter alia, devising, implementing
                  and reviewing strategy for the Project.

         5.2.3    The Management Committee shall appoint a research and
                  development committee (the "R&D COMMITTEE"), which shall
                  initially be comprised of four members, two of whom



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                  shall be nominated by Elan and two of whom shall be nominated
                  by Atrix, and each of whom shall have one vote, whether or not
                  present at an R&D Committee meeting. Decisions of the R&D
                  Committee shall require approval of at least one Elan nominee
                  on the R&D Committee and one Atrix nominee on the R&D
                  Committee.

         5.2.4    Each of Elan and Atrix shall be entitled to remove any of its
                  nominees to the R&D Committee and appoint a replacement in
                  place of any nominee so removed. The number of members of the
                  R&D Committee may be altered if agreed to by a majority of the
                  directors of Newco provided that each of Elan and Atrix shall
                  be entitled to appoint an equal number of members to the R&D
                  Committee.

         5.2.5    The R&D Committee shall be responsible for:-

                  5.2.5.1  designing that portion of the Business Plan that
                           relates to the Project for consideration by the
                           Management Committee;

                  5.2.5.2  establishing a joint Project team consisting of an
                           equal number of team members from Elan and Atrix,
                           including one Project leader from each of Elan and
                           Atrix; and

                  5.2.5.3  implementing such portion of the Business Plan that
                           relates to the Project, as approved by the Management
                           Committee.

         5.2.6    In the event of any dispute amongst the R&D Committee, the R&D
                  Committee shall refer such dispute to the Management Committee
                  whose decision on the dispute shall be binding on the R&D
                  Committee.

                  If the Management Committee cannot resolve the matter after 15
                  days or such other period as may be agreed by the Management
                  Committee, the dispute will be referred to a designated senior
                  officer of each of Elan and Atrix, and thereafter, in the
                  event of continued deadlock, pursuant to the deadlock
                  provisions to be set forth in Clause 18, involving inter alia,
                  the referral of the dispute to an expert, whose decision,
                  however, will ultimately be non-binding on the Participants.
                  This process shall also apply to any dispute within the
                  Management Committee.

                                    CLAUSE 6

                          THE BUSINESS PLAN AND REVIEWS

6.1      The Directors shall meet together as soon as reasonably practicable
         after the Closing Date and shall agree upon and approve the Business
         Plan for the current Financial Year within 60 days of the Closing Date.



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6.2      The Business Plan shall be subject to ongoing review by the Directors
         and the approval of the EIS Director and the Atrix Directors on a
         quarterly basis.

6.3      Neither Participant shall be obliged to provide development funding
         ("DEVELOPMENT FUNDING") to Newco in the absence of quarterly approval
         of the Business Plan and a determination by each Participant, in its
         sole discretion, that Development Funding shall be provided for the
         development of the Products.

                                    CLAUSE 7

                          RESEARCH AND DEVELOPMENT WORK

7.1      Subject to the provisions of Clause 6.3, Atrix and Elan, at Newco's
         request, shall provide at their respective discretion such research and
         development services as is requested by Newco in accordance with the
         provisions in the License Agreements and as articulated in the Business
         Plan. Newco shall pay Atrix and Elan for any research and development
         work carried out by them on behalf of Newco at the end of each month
         during the Research and Development Program, subject to the proper
         vouching of research and development work and expenses. An invoice
         shall be issued to Newco by Atrix or Elan, as applicable, by the 15th
         day of the month following the month in which work was performed.

         The cost of any research and development work undertaken by Atrix or
         Elan shall be calculated based on a rate of $[**] per FTE (Full Time
         Equivalent Employee Rate) per year in respect thereof (an FTE being the
         equivalent of [**] hours per year per employee). This FTE rate will be
         reviewed by Elan and Atrix on an annual basis. Research and development
         work that is sub-contracted by Elan or Atrix and to third party
         providers shall be charged by Elan or Atrix to Newco [**].

7.2      Elan and Atrix shall permit Newco or its duly authorized representative
         on reasonable notice and at any reasonable time during normal business
         hours to have access to inspect and audit the accounts and records of
         Elan or Atrix and any other book, record, voucher, receipt or invoice
         relating to the calculation or the cost of the Research and Development
         Program and to the accuracy of the reports which accompanied them. Any
         such inspection of Elan's or Atrix's records, as the case may be, shall
         be at the expense of Newco, except that if such inspection reveals an
         overpayment in the amount paid to Elan or Atrix, as the case may be,
         for the Research and Development Program hereunder in any Financial
         Year of 5% or more of the amount due to Elan or Atrix, as the case may
         be, then the expense of such inspection shall be borne solely by Elan
         or Atrix, as the case may be, instead of by Newco. Any surplus over the
         sum properly payable by Newco to Elan or Atrix, as the case may be,
         shall be paid promptly by Elan or Atrix, as the case may be, to Newco.
         If such inspection reveals a deficit in the amount of



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         the sum properly payable to Elan or Atrix, as the case may be, by
         Newco, Newco shall pay the deficit to Elan or Atrix, as the case may
         be.

                                    CLAUSE 8

                                COMMERCIALIZATION

8.1      Newco shall diligently pursue the research, development, prosecution
         and commercialization of the Products as provided in the Business Plan.

8.2      At such time as Newco notifies Elan in writing that Newco in good faith
         intends to commercialize a Product, Elan Corporation, Plc or any
         Affiliate shall have a right of first negotiation to negotiate the
         terms of any agreement for the commercialization of such Product, which
         right of first negotiation shall be exercised within [**] of Elan's
         receipt of such written notification from Newco (the "ELAN/NEWCO RIGHT
         OF FIRST NEGOTIATION"). If Elan Corporation, Plc or any Affiliate
         elects to enter into such negotiations, the Parties shall negotiate in
         good faith the terms of the agreement for the commercialization of such
         Product by Elan Corporation, Plc or the relevant Affiliate.

         If, despite good faith negotiations, Elan Corporation, Plc or the
         relevant Affiliate and Newco do not reach agreement within [**] from
         Elan's exercise of the Elan/Newco Right of First Negotiation, then
         Newco shall be free for a period of [**] thereafter to enter into
         negotiations with a third party (other than a Technological Competitor
         Of Elan) to agree to terms upon which the third party would
         commercialize the relevant Product in the Territory, which terms when
         taken as a whole, are not more favorable to the third party than the
         principal terms of the last written proposal offered by Newco to Elan
         Corporation, Plc or the relevant Affiliate or by Elan Corporation, Plc
         or the relevant Affiliate to Newco, as the case may be.

         Prior to entering into any agreement with a third party for any Product
         that relates to therapeutic areas of strategic interest to the
         Affiliates of Elan carrying on business as Elan Pharmaceuticals, Newco
         shall promptly notify Elan Corporation, Plc in writing of the principal
         terms of such proposed agreement (except for the identity of the third
         party with whom Newco intends to contract). Elan Corporation, Plc or
         the relevant Affiliate shall have the right, within 10 days of receipt
         of such notice, to elect to enter into an agreement with Newco upon the
         same terms and conditions contained in Newco's notice to Elan
         Corporation, Plc.

         If Newco has not entered into an agreement with a third party within
         the [**] period described above, the Elan/Newco Right of First
         Negotiation shall be deemed to have re-commenced upon the same terms as
         set forth herein.



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                                    CLAUSE 9

                    OWNERSHIP OF INTELLECTUAL PROPERTY RIGHTS

9.1      The Parties acknowledge and agree to be bound by the provisions of
         Clause 3.1 of the Elan License Agreement and Clause 3.1 of the Atrix
         License Agreement which set forth the agreement between the Parties in
         relation to the ownership of the Elan Intellectual Property, the Atrix
         Intellectual Property and the Newco Intellectual Property respectively.

                                    CLAUSE 10

                          INTELLECTUAL PROPERTY RIGHTS

10.1     Elan shall remain the owner of the Elan Intellectual Property.

10.2     Atrix shall remain the owner of the Atrix Intellectual Property.

10.3     Newco shall remain the owner of the Newco Intellectual Property.

10.4     Elan, at its expense and sole discretion may (i) secure the grant of
         any patent applications within the Elan Patents that relate to the
         Field; (ii) file and prosecute patent applications on patentable
         inventions and discoveries within the Elan Improvements that relate to
         the Field; (iii) defend all such applications against third party
         oppositions; and (iv) maintain in force any issued letters patent
         within the Elan Patents that relate to the Field (including any letters
         patent that may issue covering any such Elan Improvements that relate
         to the Field). Elan shall have the right in its sole discretion to
         control such filing, prosecution, defense and maintenance provided that
         Newco and Atrix at their request shall be provided with copies of all
         documents relating to such filing, prosecution, defense and maintenance
         in sufficient time to review such documents and comment thereon prior
         to filing.

10.5     Atrix, at its expense and sole discretion, may (i) secure the grant of
         any patent applications within the Atrix Patents that relate to the
         Field; (ii) file and prosecute patent applications on patentable
         inventions and discoveries within the Atrix Improvements that relate to
         the Field; (iii) defend all such applications against third party
         oppositions; and (iv) maintain in force any issued letters patent
         within the Atrix Patents that relate to the Field (including any
         letters patent that may issue covering any such Atrix Improvements that
         relate to the Field). Atrix shall have the right in its sole discretion
         to control such filing, prosecution, defense and maintenance provided
         that Elan and Newco at their request shall be provided with copies of
         all documents relating to such filing, prosecution, defense and
         maintenance in sufficient time to review such documents and comment
         thereon prior to filing.



                                       23
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10.6     In the event that Elan does not intend to file for patent protection on
         patentable inventions or discoveries within the Elan Intellectual
         Property that relates to the Field in one or more countries in the
         Territory after providing written notice to Newco and Atrix, Newco
         shall have the option at Newco's expense, upon the prior written
         approval of Elan which approval shall not be unreasonably withheld, to
         request Elan to file and prosecute such patent application(s). Upon
         such written request from Newco, Elan shall be responsible for
         preparing and prosecuting and otherwise seeking patent protection for
         such Elan Intellectual Property described in this Clause 10.6 at
         Newco's expense. Any such Elan Intellectual Property shall be owned by
         Elan but Elan shall grant a royalty free exclusive license to Newco of
         such Elan Intellectual Property in the Field. The Parties shall have
         the right to remove their confidential information from any such patent
         application.

10.7     In the event that Atrix does not intend to file for patent protection
         on patentable inventions or discoveries within the Atrix Intellectual
         Property that relates to the Field in one or more countries in the
         Territory after providing written notice to Newco and Elan, Newco shall
         have the option at Newco's expense, upon the prior written approval of
         Atrix which approval shall not be unreasonably withheld, to request
         Atrix to file and prosecute such patent application(s). Upon such
         written request from Newco, Atrix shall be responsible for preparing
         and prosecuting and otherwise seeking patent protection for such Atrix
         Intellectual Property described in this Clause 10.7 at Newco's expense.
         Any such Atrix Intellectual Property shall be owned by Atrix but Atrix
         shall grant a royalty free exclusive license to Newco of such Atrix
         Intellectual Property in the Field. The Parties shall have the right to
         remove their confidential information from any such patent application.

10.8     Newco at its expense shall have the right but shall not be obligated
         (i) to file and prosecute patent applications on patentable inventions
         and discoveries within the Newco Intellectual Property; (ii) to defend
         all such applications against third party oppositions; and (iii) to
         maintain in force any issued letters patent within the Newco Patents
         (including any patents that issue on patentable inventions and
         discoveries within the Newco Intellectual Property). Newco shall have
         the right to control such filing, prosecution, defense and maintenance
         provided that the other Parties shall be provided with copies of all
         documents relating to such filing, prosecution, defense, and
         maintenance in sufficient time to review such documents and comment
         thereon prior to filing. The Parties shall have the right to remove
         their confidential information from any such patent application.

10.9     In the event that Newco informs both Elan and Atrix that it does not
         intend to file an application on the Newco Intellectual Property in or
         outside the Field, Elan shall have the right to file and prosecute such
         patent applications on inventions that Elan invents solely or which
         relate predominantly to the Elan Intellectual Property, and Atrix shall
         have the right to file and prosecute such patent applications on
         inventions which Atrix invents solely or which relate predominantly to
         the Atrix Intellectual Property, and Elan and Atrix agree to



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         negotiate in good faith on the course of action to be taken with
         respect to Newco inventions that relate to both the Elan Intellectual
         Property and Atrix Intellectual Property. The Parties shall have the
         right to remove their confidential information from any such patent
         application.

10.10    The Parties shall promptly inform each other in writing of any actual
         or alleged unauthorized use of any Elan Intellectual Property, the
         Atrix Intellectual Property or the Newco Intellectual Property by a
         third party of which it becomes aware and provide the others with any
         available evidence of such unauthorized use.

10.11    At its option, as the case may be, Elan or Atrix shall have the first
         option to enforce at its own expense and for its own benefit any
         unauthorized use of its respective Intellectual Property (the Elan
         Intellectual Property or the Atrix Intellectual Property as the case
         may be) in the Field. At the enforcing party's request, the other
         Parties shall cooperate with such action. Should Elan or Atrix decide
         not to enforce the Elan Intellectual Property or the Atrix Intellectual
         Property respectively, against such unauthorized use in the Field,
         within a reasonable period but in any event within twenty (20) days
         after receiving written notice of such actual or alleged unauthorized
         use, Newco may in its discretion initiate such proceedings in its own
         name, at its expense and for its own benefit, and at such Party's
         request, Elan and Atrix shall cooperate with such action. Any recovery
         remaining after the deduction by Newco of the reasonable expenses
         (including attorney's fees and expenses) incurred in relation to such
         enforcement proceeding shall belong to Newco. Alternatively, the
         Parties may agree to institute such proceedings in their joint names
         and shall reach agreement as to the proportion in which they shall
         share the proceeds of any such proceedings, and the expense of any
         costs not recovered, or the costs or damages payable to the third
         party. If the enforcement of the Elan Intellectual Property or the
         Atrix Intellectual Property affects both the Field as well as other
         products being developed or commercialized by Atrix or Elan or its
         commercial partners outside the Field, Atrix or Elan shall endeavour to
         agree as to the manner in which the proceedings should be instituted
         and as to the proportion in which they shall share the proceeds of any
         such proceedings, and the expense of any costs not recovered, or the
         costs or damages payable to the third party.

10.12    Newco shall have the first right but not the obligation to bring suit
         or otherwise take action against any unauthorized use of the Newco
         Intellectual Property. If any such alleged use occurs that gives rise
         to a cause of action both inside and outside the Field, Newco, in
         consultation with the other Parties, shall determine the course of
         action to be taken. In the event that Newco takes such action, Newco
         shall do so at its own cost and expense and all damages and monetary
         award recovered in or with respect to such action shall be the property
         of Newco. Newco shall keep Elan and Atrix informed of any action in a
         timely manner so as to enable Atrix and Elan to provide input in any
         such action and Newco shall reasonably take into consideration any such
         input. At Newco's request, the Parties shall cooperate with any such
         action at Newco's cost and expense.



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10.13    In the event that Newco does not bring suit or otherwise take action
         against any unauthorized use of the Newco Intellectual Property (i) if
         only one Party determines to pursue such suit or take such action at
         its own cost and expense, it shall be entitled to all damages and
         monetary award recovered in or with respect to such action and (ii) if
         the other Parties pursue such suit or action outside of Newco, they
         shall negotiate in good faith an appropriate allocation of costs,
         expenses and recovery amounts. At the Party's request, Newco shall
         cooperate with any such action at the Party's cost and expense.

10.14    In the event that a claim or proceeding is brought against Newco by a
         third party alleging that the sale, distribution or use of a Product in
         the Territory constitutes the unauthorized use of the intellectual
         property rights of such Party, Newco shall promptly advise the other
         Parties of such threat or suit.

10.15    Save where Elan is in breach of a representation or warranty under
         Clause 7 of the Elan License Agreement or Atrix is in breach of a
         representation or warranty under Clause 7 of the Atrix License
         Agreement, Newco shall indemnify, defend and hold harmless Elan or
         Atrix, as the case may be, against all actions, losses, claims,
         demands, damages, costs and liabilities (including reasonable attorneys
         fees) relating directly or indirectly to all such claims or proceedings
         referred to in Clause 10.14, provided that Elan or Atrix, as the case
         may be, shall not acknowledge to the third party or to any other person
         the validity of any claims of such a third party, and shall not
         compromise or settle any claim or proceedings relating thereto without
         the prior written consent of Newco, not to be unreasonably withheld or
         delayed. At its option, Elan or Atrix, as the case may be, may elect to
         take over the conduct of such proceedings from Newco provided that
         Newco's indemnification obligations shall continue; the costs of
         defending such claim shall be borne by Elan or Atrix, as the case may
         be and such Party shall not compromise or settle any such claim or
         proceeding without the prior written consent of Newco, such consent not
         to be unreasonably withheld, conditioned or delayed.

                                    CLAUSE 11

           CROSS LICENSING/EXPLOITATION OF PRODUCTS OUTSIDE THE FIELD

11.1     Solely for the purpose of and insofar as is necessary, in each case,
         for Elan to conduct research and development work on behalf of Newco,
         Newco shall grant to Elan a non-exclusive, worldwide, royalty-free,
         fully paid-up license for the term of the Licenses:

         11.1.1   to use the Newco Intellectual Property in the Field, and



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         11.1.2   subject to the terms and conditions of the Atrix License
                  Agreement, a sublicense to use the Atrix Intellectual Property
                  in the Field.

11.2     Solely for the purpose of and insofar as is necessary, in each case,
         for Atrix to conduct research and development work on behalf of Newco,
         Newco shall grant to Atrix a non-exclusive, worldwide, royalty-free,
         fully paid-up license for the term of the Licenses:

         11.2.1   to use the Newco Intellectual Property in the Field, and

         11.2.2   subject to the terms and conditions of the Elan License
                  Agreement, a sublicense to use the Elan Intellectual Property
                  in the Field.

11.3     Subject to the provisions of this Clause 8, Newco hereby grants to each
         of Elan and Atrix a license to the Newco Intellectual Property as
         follows:

         11.3.1   In circumstances where the Newco Intellectual Property [**],
                  Newco hereby grants to Elan a worldwide, perpetual, fully-paid
                  and royalty-free license, with the right to sublicense, to the
                  Newco Intellectual Property for use outside the Field.

         11.3.2   In circumstances where the Newco Intellectual Property [**],
                  Newco hereby grants to Atrix a worldwide, perpetual,
                  fully-paid and royalty-free license, with the right to
                  sublicense, to the Newco Intellectual Property for use outside
                  the Field.

         11.3.3   Any license granted hereunder shall be on an as-is basis
                  without recourse, representation or warranty whether express
                  or implied, including warranties of merchantability or fitness
                  for a particular purpose, or infringement of third party
                  rights, and all such warranties are expressly disclaimed.

11.4     Elan and Atrix shall be entitled to exploit the Newco Intellectual
         Property [**] outside the Field subject to the Parties negotiating a
         license agreement in good faith (including all material provisions
         thereof, including as to whether the license should be exclusive or
         non-exclusive), pursuant to which Newco will grant Elan or Atrix, as
         the case may be, a license under the Newco Intellectual Property
         outside the Field. The financial terms of the said license agreement
         shall have regard, inter alia, to:

         11.4.1   the amount of monies expended by Newco in developing the Newco
                  Intellectual Property;

         11.4.2   the materiality of the contribution of the Newco Intellectual
                  Property by comparison to the further research and development
                  work to be conducted, and of the Elan Intellectual Property
                  and the Atrix Intellectual Property;



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         11.4.3   the financial return likely to be earned by Elan or Atrix, as
                  the case may be, from the proposed exploitation outside the
                  Field; and

         11.4.4   the impact of the proposed exploitation of the Newco
                  Intellectual Property outside the Field on the exploitation of
                  the Newco Intellectual Property within the Field.

                                    CLAUSE 12

                                   REGULATORY

12.1     Newco shall keep the other Parties promptly and fully advised of
         Newco's regulatory activities, progress and procedures. Newco shall
         inform the other Parties of any dealings it shall have with an RHA, and
         shall furnish the other Parties with copies of all correspondence
         relating to the Products. The Parties shall collaborate to obtain any
         required Regulatory Approval of the RHA to market the Products.

12.2     Newco shall, at its own cost, file, prosecute and maintain any and all
         Regulatory Applications for the Products in the Territory in accordance
         with the Business Plan.

12.3     Subject to Clause 12.5 and any determination by Newco that one or more
         regulatory approvals should be held in the name of Newco's commercial
         partner such as a sub-licensee, any and all Regulatory Approvals
         obtained hereunder for any Product shall remain the property of Newco,
         provided that Newco shall allow Elan and Atrix access thereto to enable
         Elan and Atrix to fulfill their respective obligations and exercise
         their respective rights under this Agreement. Newco shall maintain such
         Regulatory Approvals at its own cost.

12.4     It is hereby acknowledged that there are inherent uncertainties
         involved in the registration of pharmaceutical products with the RHA's
         insofar as obtaining approval is concerned and such uncertainties form
         part of the business risk involved in undertaking the form of
         commercial collaboration as set forth in this Agreement.

12.5     All regulatory approvals and the DMF (Drug Master File) relating
         predominately to the Elan Intellectual Property shall be processed by
         and be the property of Elan and at all times held in Elan's sole name.
         All regulatory approvals and the DMF relating predominately to the
         Atrigel(R) Intellectual Property shall be processed by and be the
         property of Atrix and at all times held in Atrix's sole name. Elan and
         Atrix will authorize Newco to reference such DMF, as described herein,
         with the FDA to the extent necessary for Newco's regulatory purposes.



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                                    CLAUSE 13

                                  MANUFACTURING

13.1     It is the expectation of the Parties that Newco shall enter into a
         supply agreement with Elan or Atrix, as the case may be, to allow for
         the commercial production of such Product on behalf of Newco. In
         determining which of Elan or Atrix shall provide such services, the
         Management Committee shall, in good faith, consider the respective
         infrastructure and experience of the respective Parties; provided
         however that Elan shall have the first right to manufacture and supply,
         and/or subcontract the manufacture and supply, of the NanoCrystal(TM)
         Technology formulations which may be incorporated in the Products and
         Atrix shall have the first right to manufacture and supply, and/or
         subcontract the manufacture and supply, of the Atrigel(R) Technology
         and/or the BEMA(TM) Technology.

13.2     Any such supply agreement shall be negotiated and agreed by Newco and
         Elan or Atrix, as the case may be not later than the date of completion
         of Phase III (as such term is commonly used in connection with FDA
         applications) of the R&D Plan. The terms of the said supply agreement
         shall be negotiated in good faith on standard industry and commercial
         terms.

                                    CLAUSE 14

                        TECHNICAL SERVICES AND ASSISTANCE

14.1     Whenever commercially and technically feasible, Newco shall contract
         with Atrix or Elan, as the case may be, to perform such other services
         as Newco may require, other than those specifically dealt with
         hereunder or in the License Agreements. In determining which Party
         should provide such services, the Management Committee shall take into
         account the respective infrastructure, capabilities and experience of
         Elan and Atrix. There shall be no obligation upon either of Atrix or
         Elan to perform such services.

14.2     Newco shall, if the Participants so agree, conclude an administrative
         support agreement with Elan and/or Atrix on such terms as the Parties
         thereto shall in good faith negotiate. The administrative services
         shall include one or more of the following administrative services as
         requested by Newco:

         14.2.1   accounting, financial and other services;

         14.2.2   tax services;

         14.2.3   insurance services;



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         14.2.4   human resources services;

         14.2.5   legal and company secretarial services;

         14.2.6   patent and related intellectual property services; and

         14.2.7   all such other services consistent with and of the same type
                  as those services to be provided pursuant to this Agreement,
                  as may be required.

         The foregoing list of services shall not be deemed exhaustive and may
         be changed from time to time upon written request by Newco.

14.3     The Parties agree that each Party shall effect and maintain
         comprehensive general liability insurance in respect of all clinical
         trials and other activities performed by them on behalf of Newco. The
         Participants and Newco shall ensure that the industry standard
         insurance policies shall be in place for all activities to be carried
         out by Newco.

14.4     If Elan or Atrix so requires, Atrix or Elan, as the case may be, shall
         receive, at times and for periods mutually acceptable to the Parties,
         employees of the other Party (such employees to be acceptable to the
         receiving Party in the matter of qualification and competence) for
         instruction in respect of the Elan Intellectual Property or the Atrix
         Intellectual Property, as the case may be, as necessary to further the
         Project.

14.5     The employees received by Elan or Atrix, as the case may be, shall be
         subject to obligations of confidentiality no less stringent than those
         set out in Clause 21 and such employees shall observe the rules,
         regulations and systems adopted by the Party receiving the said
         employees for its own employees or visitors.

                                    CLAUSE 15

             AUDITORS, BANKERS, ACCOUNTING REFERENCE DATE; SECRETARY

Unless otherwise agreed by the Participants and save as may be provided to the
contrary herein:

15.1     the auditors of Newco shall be KMPG Peat Marwick of Vallis Building,
         Hamilton, Bermuda;

15.2     the bankers of Newco shall be Bank of Bermuda or such other bank as may
         be mutually agreed from time to time;

15.3     the accounting reference date of Newco shall be December 31st in each
         Financial Year; and



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15.4     the secretary of Newco shall be I.S. Outerbridge or such other Person
         as may be appointed by the Directors from time to time.

                                    CLAUSE 16

                              TRANSFERS OF SHARES;
                     RIGHT OF FIRST OFFER; TAG ALONG RIGHTS

GENERAL:

16.1     Until such time as the Common Stock shall be registered pursuant to the
         Exchange Act and be publicly traded in an established securities
         market, no Stockholder shall, directly or indirectly, sell or otherwise
         transfer (each, a "TRANSFER") any Shares held by it except in as
         expressly permitted by and accordance with the terms of this Agreement.
         Newco shall not, and shall not permit any transfer agent or registrar
         for any Shares to, transfer upon the books of Newco any Shares from any
         Stockholder to any transferee, in any manner, except in accordance with
         this Agreement, and any purported transfer not in compliance with this
         Agreement shall be void.

         During the Research and Development Term, no Stockholder shall,
         directly or indirectly, sell or otherwise Transfer any of its legal
         and/or beneficial interest in the Shares held by it to any other
         Person. After completion of the Research and Development Term, a
         Stockholder may Transfer Shares provided such Stockholder complies with
         the provisions of Clauses 16.2 and 16.3.

         Notwithstanding anything contained herein to the contrary, at all
         times, EIS and/or Atrix shall have the right to Transfer any Shares to
         their Affiliates provided, however, that such assignment does not
         result in adverse tax consequences for any other Parties. EIS shall
         have the right to Transfer any Shares to a special purpose financing or
         similar entity established by Elan or EIS; provided, that such
         Affiliates or other Permitted Transferee to which such legal and/or
         beneficial interest in the Shares have been transferred shall agree to
         be expressly subject to and bound by all the limitations and provisions
         which are embodied in this Agreement.

16.2     No Stockholder shall, except with the prior written consent of the
         other Stockholder, create or permit to subsist any pledge, lien or
         charge over, or grant any option or other rights in all or any of the
         Shares held by it (other than by a Transfer of such Shares in
         accordance with the provisions of this Agreement).



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16.3     RIGHTS OF FIRST OFFER:

         If at any time after the end of the Research and Development Term a
         Stockholder shall desire to Transfer any Shares owned by it (a "SELLING
         STOCKHOLDER"), in any transaction or series of related transactions
         other than a Transfer to an Affiliate or subsidiary or in the case of
         EIS to a special purpose financing or similar entity established by
         EIS, then such Selling Stockholder shall deliver prior written notice
         of its desire to Transfer (a "NOTICE OF INTENTION") (i) to Newco and
         (ii) to the Stockholders who are not the Selling Stockholder (and any
         transferee thereof permitted hereunder, if any), as applicable, setting
         forth such Selling Stockholder's desire to make such Transfer, the
         number of Shares proposed to be transferred (the "OFFERED SHARES") and
         the proposed form of transaction (the "TRANSACTION PROPOSAL"), together
         with any available documentation relating thereto, if any, and the
         price at which such Selling Stockholder proposes to Transfer the
         Offered Shares (the "OFFER PRICE"). The "Right of First Offer" provided
         for in this Clause 16 shall be subject to any "Tag Along Right"
         benefiting a Stockholder which may be provided for by Clause 16,
         subject to the exceptions set forth therein.

         Upon receipt of the Notice of Intention, the Stockholders who are not
         the Selling Stockholder shall have the right to purchase at the Offer
         Price the Offered Shares, exercisable by the delivery of notice to the
         Selling Stockholder (the "NOTICE OF EXERCISE"), with a copy to Newco,
         within 10 business days from the date of receipt of the Notice of
         Intention. If no such Notice of Exercise has been delivered by the
         Stockholders who are not the Selling Stockholder within such
         10-business day period, or such Notice of Exercise does not relate to
         all of the Offered Shares covered by the Notice of Intention, then the
         Selling Stockholder shall be entitled to Transfer all of the Offered
         Shares to the intended transferee. In the event that all of the Offered
         Shares are not purchased by the non-selling Stockholders, the Selling
         Stockholder shall sell the available Offered Shares within 30 days
         after the delivery of such Notice of Intention on terms no more
         favorable to a third party than those presented to the non-selling
         Stockholders. If such sale does not occur, the Offered Shares shall
         again be subject to the Right of First Offer set forth in Clause 16.3.

         In the event that any of the Stockholders who are not the Selling
         Stockholder exercises their right to purchase all of the Offered Shares
         (in accordance with this Clause 16), then the Selling Stockholder shall
         sell all of the Offered Shares to such Stockholder(s), in the amounts
         set forth in the Notice of Intention, after not less than 10 business
         days and not more than 25 business days from the date of the delivery
         of the Notice of Exercise. In the event that more than one of the
         Stockholders who are not the Selling Stockholders wish to purchase the
         Offered Shares, the Offered Shares shall be allocated to such
         Stockholders on the basis of their pro rata equity interests in Newco.



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         The rights and obligations of each of the Stockholders pursuant to the
         Right of First Offer provided herein shall terminate upon the date that
         the Common Stock is registered under Section 12(b) or 12(g) of the
         Exchange Act.

         At the closing of the purchase of all of the Offered Shares by the
         Stockholders who are not the Selling Stockholder (scheduled in
         accordance with Clause 16), the Selling Stockholder shall deliver
         certificates evidencing the Offered Shares being sold, duly endorsed,
         or accompanied by written instruments of transfer in form reasonably
         satisfactory to the Stockholders who are not the Selling Stockholder,
         duly executed by the Selling Stockholder, free and clear of any adverse
         claims, against payment of the purchase price therefor in cash, and
         such other customary documents as shall be necessary in connection
         therewith.

16.4     TAG ALONG RIGHTS:

         Subject to Clause 16.3, a Stockholder (the "TRANSFERRING STOCKHOLDER")
         shall not Transfer (either directly or indirectly), in any one
         transaction or series of related transactions, to any Person or group
         of Persons, any Shares, unless the terms and conditions of such
         Transfer shall include an offer to the other Stockholders (the
         "REMAINING STOCKHOLDERS"), to sell Shares at the same price and on the
         same terms and conditions as the Transferring Stockholder has agreed to
         sell its Shares (the "TAG ALONG RIGHT").

         In the event a Transferring Stockholder proposes to Transfer any Shares
         in a transaction subject to this Clause 16.4, it shall notify, or cause
         to be notified, the Remaining Stockholders in writing of each such
         proposed Transfer. Such notice shall set forth: (i) the name of the
         transferee and the amount of Shares proposed to be transferred, (ii)
         the proposed amount and form of consideration and terms and conditions
         of payment offered by the transferee (the "TRANSFEREE TERMS") and (iii)
         that the transferee has been informed of the Tag Along Right provided
         for in this Clause 16, if such right is applicable, and the total
         number of Shares the transferee has agreed to purchase from the
         Stockholders in accordance with the terms hereof.

         The Tag Along Right may be exercised by each of the Remaining
         Stockholders by delivery of a written notice to the Transferring
         Stockholder (the "CO-SALE NOTICE") within 10 business days following
         receipt of the notice specified in the preceding subsection. The
         Co-sale Notice shall state the number of Shares owned by such Remaining
         Stockholder which the Remaining Stockholder wishes to include in such
         Transfer; provided, however, that without the written consent of the
         Transferring Stockholder, the amount of such securities belonging to
         the Remaining Stockholder included in such Transfer may not be greater
         than such



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         Remaining Stockholder's percentage beneficial ownership of Fully
         Diluted Common Stock multiplied by the total number of shares of Fully
         Diluted Common Stock to be sold by both the Transferring Stockholder
         and all Remaining Stockholders. Upon receipt of a Co-sale Notice, the
         Transferring Stockholder shall be obligated to transfer at least the
         entire number of Shares set forth in the Co-sale Notice to the
         transferee on the Transferee Terms; provided, however, that the
         Transferring Stockholder shall not consummate the purchase and sale of
         any Shares hereunder if the transferee does not purchase all such
         Shares specified in all Co-sale Notices. If no Co-sale Notice has been
         delivered to the Transferring Stockholder prior to the expiration of
         the 10 business day period referred to above and if the provisions of
         this Section have been complied with in all respects, the Transferring
         Stockholder shall have the right for a 45 day calendar day period to
         Transfer Shares to the transferee on the Transferee Terms without
         further notice to any other party, but after such 45-day period, no
         such Transfer may be made without again giving notice to the Remaining
         Stockholders of the proposed Transfer and complying with the
         requirements of this Clause 16.

         At the closing of any Transfer of Shares subject to this Clause 16, the
         Transferring Stockholder, and the Remaining Stockholder, in the event
         such Tag Along Right is exercised, shall deliver certificates
         evidencing such securities as have been Transferred by each, duly
         endorsed, or accompanied by written instruments of transfer in form
         reasonably satisfactory to the transferee, free and clear of any
         adverse claim, against payment of the purchase price therefor.

         Notwithstanding the foregoing, this Clause 16 shall not apply to any
         sale of Common Stock pursuant to an effective registration statement
         under the Securities Act in a bona fide public offering.

                                    CLAUSE 17

                    MATTERS REQUIRING STOCKHOLDERS' APPROVAL

17.1     In consideration of Atrix and Elan agreeing to enter into the License
         Agreements, the Parties hereby agree that Newco shall not without the
         prior approval of each of the EIS Director and the Atrix Director:

         17.1.1   make a material Newco determination outside the ordinary
                  course of business, including, among other things,
                  acquisitions or dispositions of intellectual property and
                  licenses or sublicenses, changes in the Business or the Newco
                  budget as they relate to the Licensed Technologies; enter into
                  joint ventures and similar arrangements as they relate to the
                  Licensed Technologies and changes to the Business Plan as they
                  relate to the Licensed Technologies;



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         17.1.2   issue any unissued Shares or unissued Common Stock
                  Equivalents, or create or issue any new shares (including a
                  split of the Shares) or Common Stock Equivalents, except as
                  expressly permitted by the Newco Bye-Laws;

         17.1.3   alter any rights attaching to any class of share in the
                  capital of Newco or alter the Newco Bye-Laws;

         17.1.4   consolidate, sub-divide or convert any of Newco's share
                  capital or in any way alter the rights attaching thereto;

         17.1.5   dispose of all or substantially all of the assets of Newco;

         17.1.6   do or permit to be done any act or thing whereby Newco may be
                  wound up (whether voluntarily or compulsorily), save as
                  otherwise expressly provided for in this Agreement;

         17.1.7   enter into any contract or transaction except in the ordinary
                  and proper course of the Business on arm's length terms;

         17.1.8   subject to Clause 23.13, assign, license or sub-license any of
                  the Elan Intellectual Property, Atrix Intellectual Property or
                  the Newco Intellectual Property;

         17.1.9   amend or vary the terms of the Atrix License Agreement or the
                  Elan License Agreement;

         17.1.10  permit a person other than Newco to own a regulatory approval
                  relating to the Product(s);

         17.1.11  amend or vary the Business Plan or the Newco budget as they
                  relate to the Licensed Technologies;

         17.1.12  alter the number of Directors;

         17.1.13  change the domicile of Newco from, or discontinue Newco out
                  of, Bermuda;

         17.1.14  register any Shares of Newco for public trading with any
                  governmental authority for public trading in any securities
                  market; and

         17.1.15  declare or pay any dividend or make any distribution, directly
                  or indirectly, with respect to its capital stock; or issue,
                  sell, exchange, deliver, redeem, purchase or otherwise acquire
                  or dispose of any shares of its capital stock or other
                  securities.



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                                    CLAUSE 18

                                    DISPUTES

18.1     Should any dispute or difference arise between Elan and Atrix, or
         between Elan or Atrix and Newco, during the period that this Agreement
         is in force, other than a dispute or difference relating to (i) the
         interpretation of any provision of this Agreement, (ii) the
         interpretation or application of law, or (iii) the ownership of any
         intellectual property, then any Party may forthwith give notice to the
         other Parties that it wishes such dispute or difference to be referred
         to a designated senior officer of each of Elan and Atrix.

18.2     In any event of a notice being served in accordance with Clause 18.1,
         each of the Participants shall within 14 days of the service of such
         notice prepare and circulate to the designated senior officer of each
         of Elan and Atrix a memorandum or other form of statement setting out
         its position on the matter in dispute and its reasons for adopting that
         position. Each memorandum or statement shall be considered by the
         designated senior officers of each of Elan and Atrix who shall
         endeavour to resolve the dispute. If designated senior officers of each
         of Elan and Atrix agree upon a resolution or disposition of the matter,
         they shall each sign a statement which sets out the terms of their
         agreement. The Participants agree that they shall exercise the voting
         rights and other powers available to them in relation to Newco to
         procure that the agreed terms are fully and promptly carried into
         effect.

18.3     In the event the designated senior officers of each of Elan and Atrix
         are unable to resolve a dispute or difference when it is referred to
         them under Clause 18.1, the following procedures shall apply:

         18.3.1   If the dispute relates to the interpretation of this Agreement
                  or any other Transaction Document or the compliance of the
                  Parties with their legal obligations thereunder, the
                  provisions of Clause 23.8.2 shall govern.

         18.3.2   If the dispute does not relate to the interpretation of this
                  Agreement or any other Transaction Document or the compliance
                  of the Parties with their legal obligations thereunder, the
                  provisions of Clause 18.4 shall govern.

18.4     The designated senior officers of each of Elan and Atrix shall, if they
         are unable to resolve a dispute or difference when it is referred to
         them under Clause 18.1, within sixty (60) days of such referral, refer
         the matter to an independent expert in pharmaceutical product
         development and marketing (including clinical development and
         regulatory affairs) jointly selected by the designated senior officers
         of each of Elan and Atrix (the "EXPERT").



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         In the event the designated senior officers of each of Elan and Atrix
         cannot agree upon the designation of the Expert, the Participants shall
         request the American Arbitration Association ("AAA"), sitting in the
         City of New York to select the Expert. In each case, the Expert shall
         be selected having regard to his suitability to determine the
         particular dispute or difference on which the Expert is being requested
         to determine. Unless otherwise agreed between the designated senior
         officers of each of Elan and Atrix, the following rules shall apply to
         the appointment of the Expert. The fees of the AAA and the Expert shall
         be shared equally by the Participants. The Expert shall be entitled to
         inspect and examine all documentation and any other material which the
         Expert may consider to be relevant to the dispute. The Expert shall
         afford each Party a reasonable opportunity (in writing or orally) of
         stating reasons in support of such contentions as each Party may wish
         to make relative to the matters under consideration. The Expert shall
         give notice in writing of his determination to the Parties within such
         time as may be stipulated in his terms of appointment or in the absence
         of such stipulation as soon as practicable but in any event within four
         weeks from the reference of the dispute or difference to him.

18.5     Any determination by the Expert of a dispute or difference shall not be
         final and binding on the Parties.

                                    CLAUSE 19

                                   TERMINATION

19.1     This Agreement shall govern the operation and existence of Newco until

         19.1.1   terminated by written agreement of all Parties hereto; or

         19.1.2   otherwise terminated in accordance with this Clause 19.

19.2     For the purpose of this Clause 19, a "RELEVANT EVENT" is committed by a
         Participant if:

         19.2.1   it commits a breach of its material obligations under this
                  Agreement and fails to cure it within 60 days of being
                  specifically required in writing to do so by the other
                  Participant; provided, however, that if the breaching
                  Participant has proposed a course of action to cure the breach
                  and is acting in good faith to cure same but has not cured the
                  breach by the 60th day, such period shall be extended by such
                  period as is reasonably necessary to permit the breach to be
                  cured, provided that such period shall not be extended by more
                  than 90 days, unless otherwise agreed in writing by the
                  Parties; or



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         19.2.2   a distress, execution, sequestration or other process is
                  levied or enforced upon or sued out against a material part of
                  its property which is not discharged or challenged within 30
                  days; or

         19.2.3   it is unable to pay its debts in the normal course of
                  business; or

         19.2.4   it ceases wholly or substantially to carry on its business,
                  otherwise than for the purpose of a reconstruction or
                  amalgamation, without the prior written consent of the other
                  Participant (such consent not to be unreasonably withheld); or

         19.2.5   the appointment of a liquidator, receiver, administrator,
                  examiner, trustee or similar officer of such Participant or
                  over all or substantially all of its assets under the law of
                  any applicable jurisdiction, including without limitation, the
                  United States of America, Bermuda or Ireland; or

         19.2.6   an application or petition for bankruptcy, corporate
                  re-organization, composition, administration, examination,
                  arrangement or any other procedure similar to any of the
                  foregoing under the law of any applicable jurisdiction,
                  including without limitation, the United States of America,
                  Bermuda or Ireland, is filed, and is not discharged within 60
                  days, or a Participant applies for or consents to the
                  appointment of a receiver, administrator, examiner or similar
                  officer of it or of all or a material part of its assets,
                  rights or revenues or the assets and/or the business of a
                  Participant are for any reason seized, confiscated or
                  condemned.

19.3     If either Participant commits a Relevant Event, the other Participant
         shall be entitled but not required, within three months of the
         occurrence of the Relevant Event, to require the defaulting Participant
         (the "RECIPIENT PARTICIPANT") to sell on reasonable terms of payment to
         the non-defaulting Participant (the "PROPOSING PARTICIPANT") all (but
         not some only) of the Shares, held or beneficially owned by the
         Recipient Participant for an amount equal to [**]% of the fair market
         value of the Shares of the Recipient Participant (the "BUYOUT OPTION").

19.4     The Proposing Participant shall notify the Recipient Participant of the
         exercise of the Buyout Option, no later than 30 business days prior to
         the proposed exercise thereof, by delivering written notice to the
         Recipient Participant stating that the Buyout Option is exercised and
         the price at which the Proposing Participant is willing to purchase the
         Shares of the Recipient Participant.

19.5     In the event that the Participants do not agree upon a purchase price
         for the Shares within five Business Days following the receipt by the
         Recipient Participant of written notice from the Proposing Participant
         pursuant to Clause 19.4 above, the Proposing Participant may contact
         the American Arbitration Association ("AAA"), sitting in New York City
         and request that an independent US-based arbitrator who is
         knowledgeable of the pharmaceutical/biotechnology industry be



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         appointed within 10 Business Days. The AAA shall endeavour to select an
         arbitrator who is technically knowledgeable in the
         pharmaceutical/biotechnology industry (and who directly and through his
         affiliates, has no business relationship with, or shareholding in,
         either the Proposing Participant or the Recipient Participant).
         Promptly upon being notified of the arbitrator's appointment, the
         Proposing Participant and the Recipient Participant shall submit to the
         arbitrator details of their assessment of the fair market value for the
         Shares of the Recipient Participant together with such information as
         they think necessary to validate their assessment. The arbitrator shall
         notify the Recipient Participant of [**]% of the fair market value
         assessed by the Proposing Participant (the "PROPOSING PARTICIPANT
         PRICE") and shall notify the Proposing Participant of [**] the fair
         market value assessed by the Recipient Participant (the "RECIPIENT
         PARTICIPANT PRICE"). The Proposing Participant and the Recipient
         Participant shall then be entitled to make further submissions to the
         arbitrator within five Business Days explaining why the Recipient
         Participant Price or the Proposing Participant Price, as the case may
         be, is unjustified. The arbitrator shall thereafter meet with the
         Proposing Participant and the Recipient Participant and shall
         thereafter choose either the Recipient Participant Price or the
         Proposing Participant Price (but not any other price) as the purchase
         price for the Shares (the "PURCHASE PRICE") on the basis of which price
         the arbitrator determines to be closer to [**] the fair market value
         for the Shares of the Recipient Participant. The arbitrator shall use
         his best efforts to determine the Purchase Price within 30 Business
         Days of his appointment. The Proposing Participant and the Recipient
         Participant shall bear the costs of the arbitrator equally. Any
         decision of the arbitrator shall be final and binding.

19.6     The Proposing Participant shall purchase the Shares of the Recipient
         Participant by delivery of the Purchase Price in cash no later than the
         15th Business Day following determination of the Purchase Price by the
         Expert.

19.7     The Shares of the Recipient Participant so transferred shall be sold by
         the transferor as beneficial owner with effect from the date of such
         transfer free from any lien, charge or encumbrance with all rights and
         restrictions attaching thereto.

19.8     If the Proposing Participant exercises the Buyout Option, both parties
         will negotiate in good faith to agree to additional reasonable
         provisions and/or amendments to the License Agreements to protect the
         intellectual property rights of the Recipient Party.

19.9     If either Participant commits a Relevant Event, the other Stockholder
         shall have in addition to all other legal and equitable rights and
         remedies hereunder, the right to terminate this Agreement upon 30 days'
         written notice.

19.10    In the event of a termination of the Elan License Agreement and/or the
         Atrix License Agreement, both parties will negotiate in good faith to
         determine whether



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         this Agreement should be terminated and if so, which provisions should
         survive termination.

19.11    The provisions of Clauses 3, 9, 10, 16, 17, 18, 19, 21 and 23 shall
         survive the termination of this Agreement under this Clause 19; all
         other terms and provisions of this Agreement shall cease to have effect
         and be null and void upon the termination of this Agreement.

                                    CLAUSE 20

                                  SHARE RIGHTS

The provisions regulating the rights and obligations attaching to the Common
Stock and the Preferred Stock are set out in the Newco Bye-laws.

                                    CLAUSE 21

                                 CONFIDENTIALITY

21.1     The Parties and/or Newco acknowledge and agree that it may be
         necessary, from time to time, to disclose to each other confidential
         and/or proprietary information, including without limitation,
         inventions, works of authorship, trade secrets, specifications,
         designs, data, know-how and other information, relating to the Field,
         the Products, present or future products, the Newco Intellectual
         Property, the Elan Intellectual Property or the Atrix Intellectual
         Property, as the case may be, methods, compounds, research projects,
         work in process, services, sales suppliers, customers, employees and/or
         business of the disclosing Party, whether in oral, written, graphic or
         electronic form (collectively "CONFIDENTIAL INFORMATION").

21.2     Save as otherwise specifically provided herein, any Confidential
         Information revealed by a Party to another Party shall be maintained as
         confidential and shall be used by the receiving Party exclusively for
         the purposes of fulfilling the receiving Party's rights and obligations
         under this Agreement, and for no other purpose. Confidential
         Information shall not include:

         21.2.1   information that is generally available to the public;

         21.2.2   information that is made public by the disclosing Party;



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         21.2.3   information that is independently developed by the receiving
                  Party, as evidenced by such Party's records, without the aid,
                  application or use of the disclosing Party's Confidential
                  Information;

         21.2.4   information that is published or otherwise becomes part of the
                  public domain without any disclosure by the receiving Party,
                  or on the part of the receiving Party's directors, officers,
                  agents, representatives or employees;

         21.2.5   information that becomes available to the receiving Party on a
                  non-confidential basis, whether directly or indirectly, from a
                  source other than the disclosing Party, which source did not
                  acquire this information on a confidential basis; or

         21.2.6   information which was already in the possession of the
                  receiving Party at the time of receiving such information, as
                  evidenced by its records, provided such information was not
                  previously provided to the receiving party from a source which
                  was under an obligation to keep such information confidential;
                  or

         21.2.7   information that is the subject of a written permission to
                  disclose, without restriction or limitation, by the disclosing
                  Party.

21.3     The receiving Party will be entitled to disclose Confidential
         Information which the receiving Party is required to disclose pursuant
         to:

         21.3.1   a valid order of a court or other governmental body or any
                  political subdivision thereof or as otherwise required by law,
                  rule or regulation; or; or

         21.3.2   any other requirement of law;

                  provided, however, that if the receiving Party becomes legally
                  required to disclose any Confidential Information, the
                  receiving Party shall give the disclosing Party prompt notice
                  of such fact so that the disclosing Party may obtain a
                  protective order or confidential treatment or other
                  appropriate remedy concerning any such disclosure. The
                  receiving Party shall fully co-operate with the disclosing
                  Party in connection with the disclosing Party's efforts to
                  obtain any such order or other remedy. If any such order or
                  other remedy does not fully preclude disclosure, the receiving
                  Party shall make such disclosure only to the extent that such
                  disclosure is legally required.

21.4     Save as otherwise specifically provided herein, each Party agrees to
         disclose Confidential Information of another Party only to those
         employees, representatives and agents requiring knowledge thereof in
         connection with their duties directly related to the fulfilling of the
         Party's obligations under this



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         Agreement, so long as such persons are under an obligation of
         confidentiality no less stringent than as set forth herein. Each Party
         further agrees to inform all such employees, representatives and agents
         of the terms and provisions of this Agreement and their duties
         hereunder and to obtain their consent hereto as a condition of
         receiving Confidential Information. Each Party agrees that it will
         exercise the same degree of care and protection to preserve the
         proprietary and confidential nature of the Confidential Information
         disclosed by a Party, as the receiving Party would exercise to preserve
         its own Confidential Information. Each Party agrees that it will, upon
         request of another Party, return all documents and any copies thereof
         containing Confidential Information belonging to or disclosed by such
         other Party. Each Party shall promptly notify the other Parties upon
         discovery of any unauthorized use or disclosure of the other Parties'
         Confidential Information.

21.5     Any breach of this Clause 21 by any employee, representative or agent
         of a Party is considered a breach by the Party itself.

21.6     The provisions relating to confidentiality in this Clause 21 shall
         remain in effect during the Term and for a period of seven years
         following the termination of this Agreement.

21.7     The Parties agree that the obligations of this Clause 21 are necessary
         and reasonable in order to protect the Parties' respective businesses,
         and each Party expressly agrees that monetary damages would be
         inadequate to compensate a Party for any breach by the other Party of
         its covenants and agreements set forth herein. Accordingly, the Parties
         agree and acknowledge that any such violation or threatened violation
         may cause irreparable injury to a Party and that, in addition to any
         other remedies that may be available, in law or in equity or otherwise,
         any Party shall be entitled to seek injunctive relief against the
         threatened breach of the provisions of this Clause 21, or a
         continuation of any such breach by the other Party, specific
         performance and other equitable relief to redress such breach together
         with its damages and reasonable counsel fees and expenses to enforce
         its rights hereunder, without the necessity of proving actual or
         express damages.

                                    CLAUSE 22

                                      COSTS

22.1     Each Stockholder shall bear its own legal and other costs incurred in
         relation to preparing and concluding this Agreement and the Definitive
         Documents.

22.2     All other costs, legal fees, registration fees and other expenses
         relating to the transactions contemplated hereby, including the costs
         and expenses incurred in relation to the incorporation of Newco, shall
         be borne by Newco.



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                                    CLAUSE 23

                                     GENERAL

23.1     GOOD FAITH:

         Each of the Parties hereto undertakes with the others to do all things
         reasonably within its power that are necessary or desirable to give
         effect to the spirit and intent of this Agreement.

23.2     FURTHER ASSURANCE:

         At the request of any of the Parties, the other Party or Parties shall
         (and shall use reasonable efforts to procure that any other necessary
         parties shall) execute and perform all such documents, acts and things
         as may reasonably be required subsequent to the signing of this
         Agreement for assuring to or vesting in the requesting Party the full
         benefit of the terms hereof.

23.3     NO REPRESENTATION:

         Each of the Parties hereto hereby acknowledges that in entering into
         this Agreement it has not relied on any representation or warranty
         except as expressly set forth herein or in any document referred to
         herein.

23.4     FORCE MAJEURE:

         Neither Party to this Agreement shall be liable for delay in the
         performance of any of its obligations hereunder if such delay is caused
         by or results from causes beyond its reasonable control, including
         without limitation, acts of God, fires, strikes, acts of war (whether
         war be declared or not), insurrections, riots, civil commotions,
         strikes, lockouts or other labor disturbances or intervention of any
         relevant government authority, provided that the Party whose
         performance is delayed or prevented shall continue to use good faith
         diligent efforts to mitigate, avoid or end such delay or failure in
         performance as soon as practicable.

23.5     RELATIONSHIP OF THE PARTIES:

         Nothing contained in this Agreement is intended or is to be construed
         to constitute Elan/EIS/EPIL and Atrix as partners, or Elan/EIS/EPIL as
         an employee or agent of Atrix, or Atrix as an employee or agent of
         Elan/EIS/EPIL.

         No Party hereto shall have any express or implied right or authority to
         assume or create any obligations on behalf of or in the name of another
         Party or to bind another Party to any contract, agreement or
         undertaking with any third party.



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23.6     COUNTERPARTS:

         This Agreement may be executed in any number of counterparts, each of
         which when so executed shall be deemed to be an original and all of
         which when taken together shall constitute this Agreement.

23.7     NOTICES:

         Any notice to be given under this Agreement shall be sent in writing by
         registered or recorded delivery post or reputable overnight courier
         such as Federal Express or telecopied to:

         Elan at:

         Lincoln House
         Lincoln Place
         Dublin 2
         Ireland
         Attention:        Vice President & General Counsel
                           Elan Pharmaceutical Technologies,
                           a division of Elan Corporation, plc
         Telephone:        353-1-709-4000
         Fax:              353-1-709-4124

         and

         Elan International Services, Ltd.
         102 St. James Court
         Flatts, Smiths FL04
         Bermuda
         Attention:        President
         Telephone:        441-292-9169
         Fax:              441-292-2224

         Atrix at:

         Atrix Laboratories, Inc.
         2579 Midpoint Drive
         Fort Collins, CO 80525-4417
         USA
         Attention:        President
         Telephone:        970-482-5868
         Fax:              970-482-9735



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         with a copy to:

         Morrison & Foerster LLP
         5200 Republic Plaza
         370 17th Street
         Denver, Colorado 80202-5638
         USA
         Attention:        Warren L. Troupe, Esq.
         Telephone:        303-592-2255
         Facsimile:        303-592-1510

         Newco at:

         Clarendon House,
         2 Church St.,
         Hamilton,
         Bermuda
         Attention:        Secretary
         Telephone:        441 292 9169
         Fax:              441 292 2224

         or to such other address(es) as may from time to time be notified by
         any Party to the others hereunder.

         Any notice sent by mail shall be deemed to have been delivered within
         three Business Days after dispatch or delivery to the relevant courier
         and any notice sent by telecopy shall be deemed to have been delivered
         upon confirmation of receipt. Notices of change of address shall be
         effective upon receipt. Notices by telecopy shall also be sent by
         another method permitted hereunder.

23.8     GOVERNING LAW

23.8.1   This Agreement shall be governed by and construed in accordance with
         the laws of the State of New York except that the applicable corporate
         laws of Bermuda shall apply to the issuance of the Shares and to the
         authority and responsibilities of the Directors.

23.8.2   In the event that a dispute regarding the matters described in Clause
         18.3.1 is not resolved pursuant to the provisions of Clause 18.1, the
         Parties agree to consider other dispute resolution mechanisms including
         mediation.

23.8.3   In the event that the Parties fail to agree on a mutually acceptable
         dispute resolution mechanism under Clause 23.8.2 or in the event that
         the dispute is not resolved pursuant to any dispute resolution
         mechanism agreed by the Parties under Clause 23.8.2 within 6 months,
         the dispute shall be finally settled by the courts of



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         competent jurisdiction. For the purposes of this Agreement the parties
         submit to the non-exclusive jurisdiction of the courts of the State of
         New York.

23.9     SEVERABILITY:

         If any provision in this Agreement is agreed by the Parties to be,
         deemed to be or becomes invalid, illegal, void or unenforceable under
         any law that is applicable hereto, such provision will be deemed
         amended to conform to applicable laws so as to be valid and enforceable
         or, if it cannot be so amended without materially altering the
         intention of the Parties, it will be deleted, with effect from the date
         of such agreement or such earlier date as the Parties may agree, and
         the validity, legality and enforceability of the remaining provisions
         of this Agreement shall not be impaired or affected in any way.

23.10    AMENDMENTS:

         No amendment, modification or addition hereto shall be effective or
         binding on any Party unless set forth in writing and executed by a duly
         authorized representative of all Parties.

23.11    WAIVER:

         No waiver of any right under this Agreement shall be deemed effective
         unless contained in a written document signed by the Party charged with
         such waiver, and no waiver of any breach or failure to perform shall be
         deemed to be a waiver of any future breach or failure to perform or of
         any other right arising under this Agreement.

23.12    ASSIGNMENT:

         None of the Parties shall be permitted to assign its rights or
         obligations hereunder without the prior written consent of the other
         Parties except as follows:

         23.12.1   Elan, EIS and/or Atrix shall have the right to assign their
                   rights and obligations hereunder to their Affiliates
                   provided, however, that such assignment does not result in
                   adverse tax consequences for any other Parties.

         23.12.2   Elan and EIS shall have the right to assign their rights and
                   obligations hereunder to a special purpose financing or
                   similar entity established by Elan or EIS.

23.13    ASSIGNMENT OF NEWCO INTELLECTUAL PROPERTY:

         Upon one month's prior notice in writing from Elan to Newco and Atrix,
         Newco shall assign the Newco Intellectual Property from Newco to a
         wholly-owned



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         subsidiary of Newco to be incorporated in Ireland, which company shall
         be newly incorporated to facilitate such assignment.

23.14    WHOLE AGREEMENT/NO EFFECT ON OTHER AGREEMENTS:

         This Agreement (including the Schedules attached hereto) and the
         Definitive Documents set forth all of the agreements and understandings
         between the Parties with respect to the subject matter hereof, and
         supersedes and terminates all prior agreements and understandings
         between the Parties with respect to the subject matter hereof. There
         are no agreements or understandings with respect to the subject matter
         hereof, either oral or written, between the Parties other than as set
         forth in this Agreement and the Definitive Documents.

         In the event of any ambiguity or conflict arising between the terms of
         this Agreement and those of the Newco Bye-Laws, the terms of this
         Agreement shall prevail except with respect to the rights and
         obligations attaching to the Common Stock and the Preferred Stock,
         where the Newco Bye-Laws shall prevail.

         No provision of this Agreement shall be construed so as to negate,
         modify or affect in any way the provisions of any other agreement
         between any of the Parties unless specifically referred to, and solely
         to the extent provided herein. In the event of a conflict between the
         provisions of this Agreement and the provisions of the License
         Agreements, the terms of this Agreement shall prevail unless this
         Agreement specifically provides otherwise.

23.15    SUCCESSORS:

         This Agreement shall be binding upon and inure to the benefit of the
         Parties hereto, their successors and permitted assigns.



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SCHEDULE 1

ELAN LICENSE AGREEMENT



                                       48
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SCHEDULE 2

ATRIX LICENSE AGREEMENT



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IN WITNESS WHEREOF, the Parties hereto have executed this Agreement on the day
first set forth above.

                                       SIGNED

                                       BY: /s/ KEVIN INSLEY
                                          ---------------------
                                          Kevin Insley
                                          Authorized Signatory on behalf of
                                          ELAN PHARMA INTERNATIONAL LIMITED



                                       SIGNED

                                       BY: /s/ KEVIN INSLEY
                                          ---------------------
                                          Kevin Insley
                                          President and Chief Financial Officer
                                          ELAN INTERNATIONAL SERVICES, LTD.



                                       SIGNED

                                       BY: /s/ DAVID R. BETHUNE
                                          ---------------------
                                          David R. Bethune
                                          Chairman and Chief Executive Officer
                                          ATRIX LABORATORIES, INC.



                                       SIGNED

                                       BY: /s/ DAVID R. BETHUNE
                                          ---------------------
                                          David R. Bethune
                                          for and on behalf of
                                          ATRIX NEWCO, LIMITED



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