Exhibit 10.49

                         CONSENT AGREEMENT AND AMENDMENT

      This Agreement (the "Agreement") dated February 25, 2004 (the "Effective
Date") is made by and among Wyeth Holdings Corporation (formerly known as
"American Cyanamid Company"), 5 Giralda Farms, Madison, New Jersey 07940
("Wyeth"), Neurocrine Biosciences, Inc., 10555 Science Center Drive, San Diego,
California 92121 ("Neurocrine"), and DOV Pharmaceutical, Inc., 433 Hackensack
Avenue, Hackensack, New Jersey 07601 ("DOV"). Wyeth, Neurocrine and DOV may each
be referred to herein individually as a "Party" and collectively as the
"Parties".

      WHEREAS, DOV and Wyeth entered into that certain License Agreement dated
May 29, 1998 (as amended from time to time, including, without limitation, by
the 2002 Consent Agreement, the "Original License Agreement") pursuant to which
DOV was granted an exclusive license from Wyeth to the compound designated as CL
285,489 (the "Compound");

      WHEREAS, DOV and Neurocrine entered into that certain Sublicense and
Development Agreement dated June 30, 1998 (as amended from time to time,
including, without limitation, by this Agreement and by the 2002 Consent
Agreement, the "Sublicense Agreement") pursuant to which DOV sublicensed to
Neurocrine its rights under the Original License Agreement in the Patent Rights
and Know-How (each as defined in the Sublicense Agreement) to, among other
things, make and sell the Licensed Product (as defined in the Sublicense
Agreement);

      WHEREAS, DOV, Neurocrine and Wyeth entered into that certain Consent and
Agreement dated December 13, 2002 (the "2002 Consent Agreement"), pursuant to
which Wyeth and DOV, inter alia, provided their consent for Neurocrine to
further sublicense to an Approved Sublicensee (as defined therein), including
Pfizer, Inc., the rights granted to it under the Sublicense Agreement;

      WHEREAS, DOV and Wyeth desire to enter into prior to or upon the Closing
(as defined below) (i) an Amended and Restated License Agreement, pursuant to
which the Original License Agreement will be amended to delete therefrom all
rights and obligations of each of Wyeth and DOV insofar as they relate to the
Compound, and (ii) the Compound License Agreement (as defined below), setting
forth the rights and obligations of each of Wyeth and DOV solely as they relate
to the Compound; and

      WHEREAS, Neurocrine desires to obtain from Wyeth and Wyeth desires to
grant to Neurocrine an assignment of (i) all of Wyeth's rights and obligations
under each of the Compound License Agreement, (ii) Wyeth's rights and
obligations under the 2002 Consent Agreement the extent such rights and
obligations relate to the Compound or the Compound Patent, and (iii) all of
Wyeth's right, title and interest in and to the Compound Patent (as defined
below), in each case subject to the rights and licenses granted to DOV pursuant
to the Compound License Agreement and the rights and licenses granted to DOV and
Neurocrine under the 2002 Consent Agreement.


                                       1


      NOW THEREFORE, in consideration of the foregoing premises and the
promises, mutual covenants and obligations set forth below, and other good and
valuable consideration, the Parties agree as follows.

1.    DEFINITIONS.

      1.1   Incorporation by Reference. All capitalized terms not otherwise
            defined herein shall have the meanings assigned to such terms in the
            Original License Agreement or the Sublicense Agreement, as
            applicable.

      1.2   "Closing" shall mean the date and time on which Wyeth assigns to
            Neurocrine and Neurocrine assumes from Wyeth, all of Wyeth's rights
            and obligations under the Compound License Agreement.

      1.3   "Compound License Agreement" shall mean the license agreement
            relating solely to the Compound, which license agreement is to be
            entered into by and between Wyeth and DOV simultaneously with their
            amendment and restatement of the Original License Agreement as
            described above in the preamble of this Agreement. The Compound
            License Agreement shall be in the form attached hereto as Exhibit
            y1.3.

      1.4   "Compound Patent" shall mean United States Patent 6,399,621 granted
            on June 4, 2002.

2.    CONSENTS.

      2.1   Consent to Amend the License Agreement. Neurocrine hereby
            acknowledges that Wyeth and DOV will, and Wyeth and DOV each agree
            that they shall, on or before the Closing, (i) amend and restate the
            Original License Agreement so as to delete therefrom all rights and
            obligations of each of Wyeth and DOV insofar as they relate to the
            Compound, and (ii) simultaneously enter into the Compound License
            Agreement. Neurocrine hereby provides its consent for Wyeth and DOV
            to so amend the Original License Agreement and enter into the
            Compound License Agreement.

      2.2   Consent to Assign the Compound License Agreement. Subject to the
            terms and conditions of this Agreement (including, without
            limitation, the entry into each of the Compound License Agreement
            and the Amended and Restated License Agreement by Wyeth and DOV) and
            in partial consideration for the amendments to be made to the
            Sublicense Agreement as set forth in Article y4 below, DOV hereby
            irrevocably provides its consent to each of Wyeth and Neurocrine for
            Wyeth to assign to Neurocrine and for Neurocrine to assume all of
            Wyeth's rights and obligations under the Compound License Agreement.
            The rights to be so assigned to Neurocrine (i) shall be subject to
            the rights and licenses granted to DOV under the Compound License
            Agreement, and (ii) shall not reduce the exclusivity enjoyed by DOV
            under the Wyeth Patents and Wyeth Know-How (each as defined in the
            Compound License Agreement) pursuant to the Compound License
            Agreement beyond that which such exclusivity with respect to such
            Wyeth Patents and Wyeth Know-How with respect to the Compound was
            reduced by DOV's grant of rights to Neurocrine under the Sublicense
            Agreement.


                                       2


      2.3   Consent to Assign Compound Patent. Subject to the terms and
            conditions of this Agreement (including, without limitation, the
            entry into each of the Compound License Agreement and the Amended
            and Restated License Agreement by Wyeth and DOV) and in partial
            consideration for the amendments to be made to the Sublicense
            Agreement as set forth in Article y4 below, DOV hereby irrevocably
            provides its consent to each of Wyeth and Neurocrine for Wyeth to
            assign to Neurocrine and for Neurocrine to assume all of Wyeth's
            right, title and interest in and to the Compound Patent. The right,
            title and interest in and to the Compound Patent to be so assigned
            to Neurocrine (i) shall be subject to the rights and licenses
            granted to DOV under the Compound License Agreement, and (ii) shall
            not reduce the exclusivity enjoyed by DOV under the Wyeth Patents
            and Wyeth Know-How (each as defined in the Compound License
            Agreement) pursuant to the Compound License Agreement beyond that
            which such exclusivity with respect to such Wyeth Patents and Wyeth
            Know-How with respect to the Compound was reduced by DOV's grant of
            rights to Neurocrine under the Sublicense Agreement.

      2.4   Consent to Assign 2002 Consent Agreement. Subject to the terms and
            conditions of this Agreement (including, without limitation, the
            entry into each of the Compound License Agreement and the Amended
            and Restated License Agreement by Wyeth and DOV) and in partial
            consideration for the amendments to be made to the Sublicense
            Agreement as set forth in Article y4 below, DOV hereby irrevocably
            provides its consent to each of Wyeth and Neurocrine for Wyeth to
            assign to Neurocrine and for Neurocrine to assume, subject to the
            obligations assumed by Neurocrine under the Compound License
            Agreement, all of Wyeth's rights and obligations under the 2002
            Consent Agreement insofar as such rights and obligations relate to
            the Compound and/or the Compound Patent, it being understood and
            agreed that Wyeth will at all times remain obligated under the 2002
            Consent Agreement as and to the extent that Wyeth is the owner or
            licensor of the ACY Know-How and the ACY Patents (as such terms are
            defined in the Original License Agreement, but not including the
            Compound Patent).

      2.5   Consent to Grant License to Neurocrine. Subject to the terms and
            conditions of this Agreement (including, without limitation, the
            entry into each of the Compound License Agreement and the Amended
            and Restated License Agreement by Wyeth and DOV) and in partial
            consideration for the amendments to be made to the Sublicense
            Agreement as set forth in Article y4 below, DOV hereby irrevocably
            provides its consent to each of Wyeth and Neurocrine for Wyeth to
            grant to Neurocrine an exclusive license, with the right to
            sublicense, under the ACY Know-How and the ACY Patents (as such
            terms is defined in the Original License Agreement and which terms
            will be referred to as the "Wyeth Know" and the "Wyeth Patents",
            respectively, in the Compound License Agreement), with the exception
            of the Compound Patent, solely for Neurocrine to make, have made,
            use, import, offer for sale and/or sell pharmaceutical products
            containing the Compound in the Territory (as such term is defined in
            the Compound License Agreement). The rights to be so licensed to
            Neurocrine (i) shall be subject and subordinate to the rights and
            licenses granted to DOV under the Compound License Agreement, (ii)
            shall not reduce the exclusivity enjoyed by DOV under the Wyeth
            Patents and Wyeth Know-How pursuant to the Compound License
            Agreement beyond that which such exclusivity with respect to such
            Wyeth Patents and Wyeth Know-How with respect to the Compound was
            reduced by DOV's grant of rights to Neurocrine under the Sublicense
            Agreement, and (iii) are to be granted to Neurocrine for purposes of
            allowing Neurocrine to assume Wyeth's role as licensor of the Wyeth
            Patents and the Wyeth Know-How and maintaining continuity in the
            chain of title with respect to the licenses granted thereunder. For
            the sake of clarity, for so long as the Sublicense Agreement or any
            license granted under the 2002 Consent Agreement is in effect,
            Neurocrine's or its Approved Sublicensee's use of the Wyeth Know-How
            and practice of the Wyeth Patents shall be accomplished through the
            rights and licenses granted to Neurocrine under the Sublicense
            Agreement or the 2002 Consent Agreement, respectively.


                                       3


3.    THE COMPOUND LICENSE AGREEMENT.

      3.1   Waiver of Certain Rights. DOV and Neurocrine hereby agree that,
            effective immediately after the assignment of the Compound License
            Agreement by Wyeth to Neurocrine and for so long thereafter as the
            Sublicense Agreement remains in effect, Neurocrine hereby
            irrevocably waives its rights under, and DOV shall have no further
            obligations under, Articles 3.0, 8.0 and 10.0 and Sections 6.5, 9.2,
            14.1, 14.2 and 14.3 of the Compound License Agreement. In the event
            that the Sublicense Agreement is terminated for any reason, such
            waiver shall no longer be in effect with respect to any activities
            occurring after the effective date of such termination.

      3.2   Right of First Refusal. DOV and Neurocrine hereby agree that,
            effective immediately after the assignment of the Compound License
            Agreement by Wyeth to Neurocrine, the Compound License Agreement is
            hereby amended to delete therefrom Article 4.0 in its entirety.

      3.3   Payments. DOV and Neurocrine hereby agree that effective immediately
            after the assignment of the Compound License Agreement by Wyeth to
            Neurocrine and for so long thereafter as the Sublicense Agreement
            remains in effect or any license granted by Wyeth or DOV to
            Neurocrine or any sublicensee of Neurocrine remains in effect, the
            Compound License Agreement is hereby amended by deleting Sections
            6.2, 6.3 and 6.4 therefrom in their entirety and inserting in their
            place, the following:


                                       4


            "6.2  DOV shall pay to Wyeth each of the following Scheduled
                  Payments within thirty (30) days after the occurrence of the
                  event specified below for such Scheduled Payment:

                  --------------------------------------------------------------
                                   Event                       Scheduled Payment
                  --------------------------------------------------------------
                  First to occur of the  filing  of an NDA         $1,000,000
                  for the Marketed Product in either the
                  United States, Japan or within the
                  European Union
                  --------------------------------------------------------------
                  Regulatory  approval  for the  marketing         $1,500,000
                  of the Marketed Product within either
                  the United States, Japan or within the
                  European Union
                  --------------------------------------------------------------

            6.3   In consideration of the rights and licenses granted to DOV
                  under Article 2.0 hereof, DOV shall pay to Wyeth during the
                  term of this Agreement, on a country-by-country basis,
                  royalties consisting of two and one-half percent (2 1/2 %) of
                  Net Sales of Marketed Product."

            In the event that the Sublicense Agreement ceases to be in effect
            for any reason and the licenses granted by Wyeth or DOV to
            Neurocrine or any sublicensee of Neurocrine pursuant to the 2002
            Consent Agreement cease to be in effect, the amendment set forth in
            this Section y3.3 shall no longer be of any force or effect and the
            Sections 6.2, 6.3 and 6.4 of the Compound License Agreement as they
            exist prior to the amendment thereto pursuant to this Section y3.3
            shall again become effective as of such time.

      3.4   Patent Enforcement. DOV and Neurocrine hereby agree that effective
            immediately after the assignment of the Compound License Agreement
            by Wyeth to Neurocrine and for so long thereafter as the Sublicense
            Agreement remains in effect or any license granted by Wyeth or DOV
            to Neurocrine or Neurocrine's Approved Sublicensee under the 2002
            Consent Agreement remains in effect, DOV's and Neurocrine's (or
            Neurocrine's Approved Sublicensee's) rights and obligations with
            respect to the enforcement of any patent included within the Wyeth
            Patents (as such term is defined in the Compound License Agreement)
            shall be governed by the terms and conditions of the Sublicense
            Agreement (as amended hereby) and that Section 12.3 of the Compound
            License Agreement shall have no effect. In the event that the
            Sublicense Agreement is terminated for any reason and the licenses
            granted by ACY or DOV to Neurocrine or Neurocrine's Approved
            Sublicensee pursuant to the 2002 Consent Agreement cease to be in
            effect, the rights and obligations of each of DOV and Neurocrine
            with respect to the enforcement of any patent included within the
            Wyeth Patents shall thereafter be governed by Section 12.3 of the
            Compound License Agreement.


                                       5


      3.5   Term of Agreement. DOV and Neurocrine hereby agree that, effective
            immediately after the assignment of the Compound License Agreement
            to Neurocrine, the term of the Compound License Agreement shall be,
            and, subject to Section y5.6 of this Agreement, DOV's payment
            obligations to Neurocrine as Wyeth's assignee thereunder shall
            continue in full force and effect, in each country of the Territory
            until the later of (a) the final expiration in such country of each
            patent, including, without limitation, any patent included in the
            Wyeth Patents and any patent owned or controlled by Neurocrine
            (including, without limitation, U.S. Patent 6,544,999) which patent
            would be practiced by the manufacture, use or sale of the Compound
            or (b) ten (10) years following the first sale of the Licensed
            Product by DOV or its sublicensee in such country.

4.    AMENDMENTS TO SUBLICENSE AGREEMENT.

      4.1   Patent Enforcement. In partial consideration for DOV's agreement to
            provide the consents set forth in Sections y2.2 through y2.5 above,
            Neurocrine and DOV hereby agree to amend Section 8.2 of the
            Sublicense Agreement by deleting Section 8.2 in its entirety and
            replacing it with the following:

            "8.2  Each of DOV and Neurocrine shall promptly inform the other
                  party of any suspected infringement by a third party of any
                  patent included within the Patent Rights and provide such
                  other party with any available evidence of such suspected
                  infringement.

                  Neurocrine, either directly or through its sublicensee, shall
                  have the right but not the obligation to institute or initiate
                  any claim, suit or proceeding against an infringer or a
                  presumed infringer of any patent included within the Patent
                  Rights. Neurocrine, either directly or through its
                  sublicensee, shall control the prosecution of any such suit,
                  claim or proceeding, including, without limitation, the choice
                  of counsel and any settlement of any such suit or claim,
                  provided, however, Neurocrine shall not admit the invalidity
                  of any patent included within the Patent Rights pursuant to
                  any such settlement, without DOV's prior written consent. DOV
                  shall provide Neurocrine with all reasonable assistance (other
                  than financial) required to institute and maintain such
                  proceedings.


                                       6


                  In the event that a claim, suit or other proceeding against an
                  infringer or a presumed infringer of any patent included
                  within the Patent Rights is not instituted or initiated by
                  either Neurocrine or its sublicensee within six (6) months
                  after DOV has requested Neurocrine to do so, DOV, after good
                  faith consultation with Neurocrine regarding the reasons for
                  electing not to initiate or institute such claim, suit or
                  other proceeding, and subject to Neurocrine's consent, such
                  consent not to be unreasonably withheld, shall have the right
                  to institute a claim, suit or proceeding against such
                  infringer or presumed infringer. In such event DOV shall
                  control the prosecution of any such suit, claim or proceeding,
                  including, without limitation, the choice of counsel and any
                  settlement of any such suit or claim, provided, however, that
                  DOV shall not admit the invalidity of any patent included
                  within the Patent Rights pursuant to any such settlement
                  without Neurocrine's prior written consent. Neurocrine shall
                  provide, and shall cause its sublicensee to provide, DOV with
                  all reasonable assistance (other than financial) required to
                  institute and maintain such proceedings.

                  Any proceeds from any proceeding brought by or on behalf of
                  Neurocrine or Neurocrine's sublicensee against an infringer or
                  presumed infringer as provided in this Section 8.2 shall first
                  be allocated to reimburse each of DOV, Neurocrine and
                  Neurocrine's sublicensee for the costs incurred by such party
                  in connection with such proceedings. DOV shall be entitled to
                  receive ten percent (10%) of any amount remaining from such
                  proceeds and Neurocrine, subject to Neurocrine's obligations
                  under any agreement between Neurocrine and its sublicensee
                  with respect to such proceeds, shall be entitled to retain the
                  remaining amount of such proceeds. Any remaining proceeds from
                  any proceeding brought by or on behalf of DOV against an
                  infringer or presumed infringer as provided in this Section
                  8.2 shall first be allocated to reimburse each of DOV and
                  Neurocrine for the costs incurred by such party in connection
                  with such proceedings. DOV shall be entitled to retain ninety
                  percent (90%) of any amount remaining from such proceeds and,
                  subject to Neurocrine's obligations under any agreement
                  between Neurocrine and its sublicensee with respect to such
                  proceeds, the remainder shall be distributed to Neurocrine."


                                       7


      4.2   Term. In partial consideration for DOV's agreement to provide the
            consents set forth in Sections y2.2 through y2.5 above, Neurocrine
            and DOV hereby agree to amend Section 15.1 of the Sublicense
            Agreement by deleting Section 15.1 in its entirety and replacing it
            with the following:

            "15.1 This Agreement and Neurocrine's payment obligations hereunder
                  shall continue in full force and effect in each country of the
                  Territory until the later of (a) the final expiration in such
                  country of each patent, including, without limitation, any
                  patent included in the Patent Rights and any patent owned or
                  controlled by Neurocrine (including, without limitation, U.S.
                  Patent 6,544,999) which patent would be practiced by the
                  manufacture, use or sale of the Compound or (b) ten (10) years
                  following the first sale of the Licensed Product by Neurocrine
                  or its sublicensee in such country."

      4.3   Governing Law. Neurocrine and DOV hereby agree to amend Article 13
            of the Sublicense Agreement by replacing in the second line thereof
            "Delaware" with "New York".

      4.4   Public Communications. In partial consideration for DOV's agreement
            to provide the consents set forth in Sections y2.2 through y2.5
            above, Neurocrine and DOV hereby agree to amend Section 16.9 of the
            Sublicense Agreement by adding the following to the end thereof:

                  "In any annual filing made by Neurocrine under the Securities
                  Act of 1934 or any press release issued by or on behalf of
                  Neurocrine or Neurocrine's Affiliates regarding the Compound,
                  Neurocrine shall use its reasonable best efforts to state that
                  the Compound is being developed and/or commercialized under
                  license from DOV. In any public presentation of regarding the
                  Compound made by any employee or representative of Neurocrine
                  or any of Neurocrine's Affiliates, Neurocrine shall use its
                  reasonable efforts to indicate that the Compound is being
                  developed and/or commercialized under license from DOV.
                  Neurocrine shall use its reasonable efforts to request that
                  its sublicensee undertake similar obligations."


                                       8


5.    OTHER MATTERS.

      5.1   Assumption of Obligations. Each Party agrees that, upon the
            assignment by Wyeth to Neurocrine of Wyeth's rights and obligations
            under the Compound License Agreement, it shall sign and deliver to
            each of the other Parties an assignment and assumption agreement in
            the form attached hereto as Exhibit y5.1 duly executed by an
            authorized officer of such Party.

      5.2   Preservation of Patents. Neurocrine agrees that, upon assignment by
            Wyeth of the Compound Patent to Neurocrine that Neurocrine shall
            not, without DOV's prior written consent, (i) allow the Compound
            Patent to lapse (by reason of failure to pay maintenance fees or
            annuities or to take any other action necessary to maintain the
            Compound Patent in full force and effect) or (ii) admit the
            invalidity of the Compound Patent or take any other action that
            would result in the invalidity of the Compound Patent.

      5.3   Payment of Legal Expenses. Neurocrine agrees that, within five (5)
            business days after the effective date of this Agreement, it shall
            pay to DOV those legal fees incurred by DOV in negotiating and
            entering into the 2002 Consent Agreement, which legal fees amount to
            Thirty Thousand Nine Hundred Ninety Two Dollars and Seventy-Eight
            Cents ($30,992.78).

      5.4   No Further Obligations. Each of DOV and Neurocrine agree that, upon
            the assignment by Wyeth to Neurocrine of Wyeth's rights and
            obligations under the Compound License Agreement and of Wyeth's
            right, title and interest in and to the Compound Patent, that Wyeth
            shall have no further obligations under the Compound License
            Agreement or with respect to the Compound Patent.

      5.5   Exercise of Rights. Each of DOV and Neurocrine shall exercise and
            shall cause their respective Affiliates to exercise any and all
            rights and elections required to preserve the rights granted under
            the Compound License Agreement and the Sublicense Agreement pursuant
            to Section 365(n) of the United States Bankruptcy Code (11 USC
            ss.365(n)).

      5.6   Net Payments. DOV and Neurcrine hereby agree, that upon the
            assignment by Wyeth to Neurocrine of Wyeth's rights and obligations
            under the Compound License Agreement, Neurocrine may subtract from
            each payment to be made by Neurocrine to DOV under the Sublicense
            Agreement an amount equal to that portion of such payment that DOV
            is required to pay to Neurocrine, as Wyeth's assignee, under the
            Compound License Agreement (prior to such subtraction), provided,
            however, that for any amount so subtracted by Neurocrine from
            payments due DOV under the Sublicense Agreement, DOV shall not be
            required to pay such amounts to Neurocrine, as Wyeth's assignee,
            under the Compound License Agreement.


                                       9


6.    MISCELLANEOUS.

      6.1   Amendment. No amendment, modification or supplement of any provision
            of this Agreement shall be valid or effective unless made in writing
            and signed by a duly authorized officer of each of the Parties.

      6.2   Waiver. No provision of the Agreement shall be waived by any act,
            omission or knowledge of a Party or its agents or employees except
            by an instrument in writing expressly waiving such provision and
            signed by a duly authorized officer of the waiving Party. The waiver
            by either of the Parties of any breach of any provision hereof by
            the other Party shall not be construed to be a waiver of any
            succeeding breach of such provision or a waiver of the provision
            itself.

      6.3   Severability. If any clause or portion thereof in this Agreement is
            for any reason held to be invalid, illegal or unenforceable, the
            same shall not affect any other portion of this Agreement, as it is
            the intent of the Parties that this Agreement shall be construed in
            such fashion as to maintain its existence, validity and
            enforceability to the greatest extent possible. In any such event,
            this Agreement shall be construed as if such clause or portion
            thereof had never been contained in this Agreement, and there shall
            be deemed substituted therefor such provision as will most nearly
            carry out the intent of the Parties as expressed in this Agreement
            to the fullest extent permitted by applicable law.

      6.4   Representation by Legal Counsel. Each Party hereto represents that
            it has been represented by legal counsel in connection with this
            Agreement and acknowledges that it has participated in the drafting
            hereof and that it has not relied on any statement or action made by
            any other Party's legal counsel in the discussions regarding this
            Agreement. In interpreting and applying the terms and provisions of
            this Agreement, the Parties agree that no presumption shall exist or
            be implied against the Party who drafted such terms and provisions.

      6.5   Notices. Any notices required hereunder shall be sent by registered
            or certified mail or by an equivalent service capable of
            verification at the address stated below or such other address as to
            which the parties may provide in the future.


                                       10


            If to Wyeth:

                     Wyeth Pharmaceuticals
                     500 Arcola Road
                     Collegeville, Pennsylvania 19426
                     Attn:  Senior Vice President, Global Business Development

                              With a copy to:

                              Wyeth
                              5 Giralda Farms
                              Madison, New Jersey 07940
                              Attn:  General Counsel

            If to Neurocrine:

                     Neurocrine Biosciences, Inc.
                     10555 Science Center Drive
                     San Diego, California 92121
                     Attn: CEO
                     With copy: General Counsel

            If to DOV:

                     DOV Pharmaceutical, Inc.
                     433 Hackensack Avenue
                     Hackensack, New Jersey 07601
                     Attn: CEO
                     With copy: General Counsel

      6.6   Descriptive Headings. The descriptive headings of this Agreement are
            for convenience only, and shall be of no force or effect in
            construing or interpreting any of the provisions of this Agreement.

      6.7   Governing Law. This Agreement and the 2002 Consent Agreement shall
            be governed by and interpreted in accordance with the substantive
            laws of the State of New York, without regard to conflict of law
            principles thereof.

      6.8   Counterparts. This Agreement may be executed in any number of
            counterparts each of which shall be an original and all originals of
            which shall be deemed a single instrument.

      6.9   Entire Agreement. This Agreement represents the full understanding
            between the Parties with respect to the subject matter hereof and
            cancels and supersedes any and all prior negotiations,
            correspondence, understandings and agreements, whether oral or
            written, among the Parties respecting the subject matter hereof.
            Notwithstanding the foregoing, except as expressly stated herein
            with respect to the amendments to be made to the Compound License
            Agreement, the amendments to be made to the Sublicense Agreement,
            and the rights and obligations of Wyeth under each of the Compound
            License Agreement and the 2002 Consent Agreement, this Agreement
            shall have no effect on the Compound License Agreement, the
            Sublicense Agreement or the 2002 Consent Agreement, which agreements
            shall continue in full force and effect as so amended.


                                       11


      6.10  Independent Contractors. This Agreement shall not constitute any
            Party as the joint venturer, legal representative or agent of any
            other Party hereto and no Party hereto shall have the right or
            authority to assume or create any obligation on the part of any
            other Party hereto.

IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be executed
by their duly authorized representatives.


WYETH HOLDINGS CORPORATION


/s/ Robert A. Dougan
- -----------------------------------
By:  Robert A. Dougan
Title: Senior Vice President


NEUROCRINE BIOSCIENCES, INC.


/s/ Gary A. Lyons
- -----------------------------------
By:    Gary A. Lyons
Title: President and CEO


DOV PHARMACEUTICAL, INC.


/s/ Robert Horton
- -----------------------------------
By:    Robert Horton
Title: Vice President and
        General Counsel


                                       12