EXHIBIT 10.66



THIS WARRANT AND THE  SECURITIES  ISSUABLE  UPON  EXERCISE  HEREOF HAVE NOT BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY APPLICABLE STATE
LAWS,  AND NO INTEREST  THEREIN  MAY BE SOLD,  DISTRIBUTED,  ASSIGNED,  OFFERED,
PLEDGED OR  OTHERWISE  TRANSFERRED  UNLESS  THERE IS AN  EFFECTIVE  REGISTRATION
STATEMENT UNDER SUCH ACT AND APPLICABLE  STATE SECURITIES LAWS COVERING ANY SUCH
TRANSACTION OR SUCH TRANSACTION IS EXEMPT FROM THE REGISTRATION  REQUIREMENTS OF
SUCH ACT AND LAWS,  SUCH  COMPLIANCE,  AT THE OPTION OF THE  CORPORATION,  TO BE
EVIDENCED BY AN OPINION OF  WARRANTHOLDER'S  COUNSEL,  IN FORM ACCEPTABLE TO THE
CORPORATION, THAT NO VIOLATION OF SUCH REGISTRATION PROVISIONS WOULD RESULT FROM
ANY PROPOSED TRANSFER OR ASSIGNMENT.


                    SERIES "P" COMMON STOCK PURCHASE WARRANT

                        Bioject Medical Technologies Inc.


     THIS  CERTIFIES  that for good and valuable  consideration  received,  Elan
International Services, Ltd., or registered assigns, is entitled, upon the terms
and subject to the  conditions  hereinafter  set forth,  to acquire from Bioject
Medical  Technologies  Inc., an Oregon  corporation  (the  "Corporation")  up to
3,790,000  fully paid and  nonassessable  shares of common  stock,  without  par
value, of the Corporation  ("Warrant  Stock") at a purchase price per share (the
"Exercise Price") of $1.50.

1.   Term of Warrant

     Subject to the terms and conditions set forth herein, this Warrant shall be
exercisable,  in whole or from  time to time  part,  at any time on or after the
date hereof and at or prior to 11:59 p.m.,  Pacific  Standard  Time, on June 30,
2006 (the "Expiration Time").

2.   Exercise of Warrant

     The purchase  rights  represented  by this Warrant are  exercisable  by the
registered holder hereof, in whole or in part, at any time and from time to time
at or prior to the  Expiration  Time by the  surrender  of this  Warrant and the
Notice of  Exercise  form  attached  hereto  duly  executed to the office of the
Corporation at 7620 S.W. Bridgeport Road, Portland,  Oregon 97224 (or such other
office or agency of the  Corporation as it may designate by notice in writing to
the  registered  holder  hereof at the address of such holder  appearing  on the
books of the Corporation), and upon payment of the Exercise Price for the shares
thereby purchased (by cash or by check or bank draft payable to the order of the
Corporation or by  cancellation of indebtedness of the Corporation to the holder
hereof, if any, at the time of exercise in an amount equal to the purchase price
of the shares thereby purchased);  whereupon the holder of this Warrant shall be
entitled to receive  from the  Corporation  a stock  certificate  in proper form
representing the number of shares of Warrant Stock so purchased.

3.   Issuance of Shares; No Fractional Shares of Scrip

     Certificates  for shares  purchased  hereunder  shall be  delivered  to the
holder hereof by the Corporation's  transfer agent at the Corporation's  expense
within a reasonable  time after the date on which this  Warrant  shall have been
exercised in accordance  with the terms hereof.  Each  certificate  so delivered
shall be in such  denominations  as may be  requested  by the holder  hereof and
shall be registered in the name of such holder or,  subject to applicable  laws,
other name as shall be  requested  by such  holder.  If,  upon  exercise of this
Warrant, fewer than all of the shares of Warrant Stock evidenced by this Warrant
are  purchased  prior  to  the  Expiration   Time,  one  or  more  new  warrants
substantially  in the form of, and on the terms in, this  Warrant will be issued
for the remaining  number of shares of Warrant Stock not purchased upon exercise
of this Warrant.  The Corporation hereby represents and warrants that all shares
of Warrant  Stock which may be issued upon the  exercise of this  Warrant  will,
upon such exercise, be duly




                                      -1-



and validly  authorized and issued,  fully paid and  nonassessable and free from
all taxes,  liens and  charges in respect of the  issuance  thereof  (other than
liens or charges  created by or imposed  upon the holder of the Warrant  Stock).
The  Corporation  agrees that the shares so issued  shall be and be deemed to be
issued to such  holder  as the  record  owner of such  shares as of the close of
business  on the date on which  this  Warrant  shall have been  surrendered  for
exercise in  accordance  with the terms hereof.  No  fractional  shares or scrip
representing  fractional  shares  shall  be  issued  upon the  exercise  of this
Warrant. With respect to any fraction of a share called for upon the exercise of
this Warrant,  an amount equal to such  fraction  multiplied by the then current
price at which each share may be  purchased  hereunder  shall be paid in cash to
the holder of this Warrant.

4.   Charges, Taxes and Expenses

     Issuance of  certificates  for shares of Warrant Stock upon the exercise of
this Warrant shall be made without  charge to the holder hereof for any issue or
transfer  tax or other  incidental  expense in respect of the  issuance  of such
certificate,  all of which taxes and expenses shall be paid by the  Corporation,
and such certificates  shall be issued in the name of the holder of this Warrant
or in such  name or names as may be  directed  by the  holder  of this  Warrant;
provided,  however,  that in the event  certificates for shares of Warrant Stock
are to be issued in a name other  than the name of the  holder of this  Warrant,
this  Warrant  when  surrendered  for  exercise  shall  be  accompanied  by  the
Assignment Form attached hereto duly executed by the holder hereof.

5.   No Rights as Shareholders

     This  Warrant  does not entitle the holder  hereof to any voting  rights or
other rights as a shareholder of the Corporation prior to the exercise hereof.

6.   Redemption Right

     In the event  that the holder  provides  notice to the  Corporation  of its
intention to exercise all or any part of this Warrant pursuant to the provisions
of Section 2, the Corporation shall have the right, within 90 days of receipt of
such notice and upon five  business  days' notice to the holder,  to cause to be
redeemed  for cash this  Warrant,  subject to such  notice,  at a price equal to
$2.015  million  plus  accrued  interest  at a  rate  equal  to 15%  per  annum,
compounded  semi-annually,  from  June 30,  1999  until the date  redeemed  (the
"Redemption  Price"). In the event that such cash amount is not paid within such
90-day period,  such redemption right shall lapse and be of no further force and
effect,  and the holder  shall  thereupon  have the right once again to exercise
this Warrant.  During such 90-day (or shorter, if redeemed,  as set forth above)
period,  the holder  shall not  exercise  all or part of this  Warrant  into the
Corporation's Common Stock,  whether or not the Corporation  exercises its right
of redemption.  The corporation's right to redeem expires at 11:59 p.m., Pacific
Standard  Time, on June 30, 2004 unless a notice of exercise has been  delivered
to the corporation  within the prior 90 days, in which case the redemption right
expires  immediately  following  the end of the 90-day  period to the extent not
utilized.  If the holder provides notice that it intends to exercise only a part
of this Warrant,  the Corporation has the right to redeem the entire Warrant for
the  Redemption  Price,  or only that  portion of the  Warrant  which the holder
intends to exercise. In the case of a partial redemption,  the corporation shall
pay that  percentage of the  Redemption  Price that equals the percentage of the
Warrant to the exercised by the holder.  A partial  redemption  shall not effect
the right of the  corporation  to redeem the  remainder  of this  Warrant in the
future, subject to this Section 6.

7.   Exchange and Registry of Warrant

     This Warrant is  exchangeable,  upon the surrender hereof by the registered
holder at the  above-mentioned  office or agency of the  Corporation,  for a new
Warrant  of like  tenor and dated as of such  exchange.  The  Corporation  shall
maintain at the above-mentioned office or agency a registry showing the name and
address  of  the  registered  holder  of  this  Warrant.  This  Warrant  may  be
surrendered for exchange, transfer or exercise, in accordance with its terms, at
such office or agency of the Corporation,  and the Corporation shall be entitled
to rely in all  respects,  prior to written  notice to the  contrary,  upon such
registry.




                                      -2-



8.   Loss, Theft, Destruction or Mutilation of Warrant

     Upon receipt by the Corporation of evidence  reasonably  satisfactory to it
of the loss,  theft,  destruction or mutilation of this Warrant,  and in case of
loss, theft or destruction of indemnity or security  reasonably  satisfactory to
it,  and  upon  reimbursement  to the  Corporation  of all  reasonable  expenses
incidental  thereto,  and upon surrender and  cancellation  of this Warrant,  if
mutilated, the Corporation will make and deliver a new Warrant of like tenor and
dated as of such cancellation, in lieu of this Warrant.

9.   Saturdays, Sundays and Holidays

     If the last or appointed day for the taking of any action or the expiration
of any right required or granted herein shall be a Saturday or a Sunday or shall
be a legal holiday, then such action may be taken or such right may be exercised
on the next succeeding day not a Saturday, Sunday or legal holiday.

10.  Merger, Sale of Assets, Etc.

     If at any time the  Corporation  proposes to merge or  consolidate  with or
into any other corporation, effect any reorganization,  or sell or convey all or
substantially  all of its assets to any other  entity,  then,  as a condition of
such reorganization,  consolidation, merger, sale or conveyance, the Corporation
or its successor,  as the case may be, shall enter into a supplemental agreement
to make lawful and adequate provision whereby the holder shall have the right to
receive,  upon exercise of the Warrant, the kind and amount of equity securities
which would have been received upon such reorganization,  consolidation, merger,
sale or  conveyance  by a holder of a number of shares of common  stock equal to
the number of shares issuable upon exercise of the Warrant  immediately prior to
such reorganization,  consolidation, merger, sale or conveyance. If the property
to  be  received  upon  such  reorganization,  consolidation,  merger,  sale  or
conveyance is not equity  securities,  the Corporation  shall give the holder of
this  Warrant  ten (10)  business  days  prior  written  notice of the  proposed
effective date of such  transaction,  and if this Warrant has not been exercised
by or on the effective date of such transaction, it shall terminate.

11.  Subdivision, Combination, Reclassification, Conversion, Etc.

     If  the  Corporation  at  any  time  shall,  by  subdivision,  combination,
reclassification  of securities or otherwise,  change the Warrant Stock into the
same or a different  number of securities of any class or classes,  this Warrant
shall  thereafter  entitle  the  holder  to  acquire  such  number  and  kind of
securities as would have been issuable in respect of the Warrant Stock (or other
securities  which  were  subject  to the  purchase  rights  under  this  Warrant
immediately prior to such subdivision,  combination,  reclassification  or other
change) as the result of such change if this Warrant had been  exercised in full
for cash immediately prior to such change. The Exercise Price hereunder shall be
adjusted if and to the extent  necessary to reflect such change.  If the Warrant
Stock or other  securities  issuable  upon  exercise  hereof are  subdivided  or
combined into a greater or smaller number of shares of such security, the number
of shares issuable hereunder shall be proportionately increased or decreased, as
the case may be, and the  Exercise  Price  shall be  proportionately  reduced or
increased,  as the case may be, in both cases  according  to the ratio which the
total number of shares of such security to be outstanding immediately after such
even  bears  to  the  total  number  of  shares  of  such  security  outstanding
immediately  prior to such event.  The Corporation  shall give the holder prompt
written notice of any change in the type of securities issuable  hereunder,  any
adjustment of the Exercise Price for the securities issuable hereunder,  and any
increase or decrease in the number of shares issuable hereunder.




                                      -3-



12.  Transferability; Compliance with Securities Laws

     (a) This  Warrant  may not be  transferred  or assigned in whole or in part
without  compliance with all applicable federal and state securities laws by the
transferor and transferee  (including the delivery of investment  representation
letters  and legal  opinions  reasonably  satisfactory  to the  Corporation,  if
requested  by  the  Corporation).   Subject  such  restrictions,  prior  to  the
Expiration  Time, this Warrant and all rights  hereunder are transferable by the
holder hereof,  in whole or in part, at the office or agency of the  Corporation
referred to in Section 1 hereof. Any such transfer shall be made in person or by
the holder's duly authorized  attorney,  upon surrender of this Warrant together
with the Assignment Form attached hereto properly endorsed.

     (b) The Holder of this Warrant,  by acceptance  hereof,  acknowledges  that
this  Warrant and the Warrant  Stock  issuable  upon  exercise  hereof are being
acquired  solely for the holder's own account and not as a nominee for any other
party, and for investment, and that the holder will not offer, sell or otherwise
dispose  of this  Warrant  or any  shares of  Warrant  Stock to be  issued  upon
exercise hereof except under  circumstances  that will not result in a violation
of the Securities Act of 1933, as amended,  or any state  securities  laws. Upon
exercise of this  Warrant,  the holder shall,  if requested by the  Corporation,
confirm in writing,  in a form satisfactory to the Corporation,  that the shares
of Warrant Stock so purchased are being acquired solely for holder's own account
and not as a nominee for any other party,  for  investment,  and not with a view
toward distribution or resale.

     (c) The  Warrant  Stock has not been and will not be  registered  under the
Securities Act of 1933, as amended, and this Warrant may not be exercised except
by (i) the original  purchaser of this Warrant from the  Corporation  or (ii) an
"accredited  investor"  as defined in Rule 501(a)  under the  Securities  Act of
1933,  as amended.  Each  certificate  representing  the Warrant  Stock or other
securities  issued in respect of the Warrant  Stock upon any stock split,  stock
dividend,  recapitalization,  merger,  consolidation or similar event,  shall be
stamped or otherwise imprinted with a legend substantially in the following form
(in addition to any legend required under applicable securities laws):

     THE SECURITIES  REPRESENTED  HEREBY HAVE NOT BEEN  REGISTERED  UNDER UNITED
STATES FEDERAL OR STATE SECURITIES LAWS AND MAY NOT BE OFFERED FOR SALE, SOLD OR
OTHERWISE TRANSFERRED OR ASSIGNED FOR VALUE, DIRECTLY OR INDIRECTLY, NOR MAY THE
SECURITIES BE TRANSFERRED ON THE BOOKS OF THE CORPORATION,  WITHOUT REGISTRATION
OF  SUCH  SECURITIES  UNDER  ALL  APPLICABLE  UNITED  STATES  FEDERAL  OR  STATE
SECURITIES  LAWS OR COMPLIANCE  WITH AN  APPLICABLE  EXEMPTION  THEREFROM,  SUCH
COMPLIANCE,  AT THE OPTION OF THE CORPORATION,  TO BE EVIDENCED BY AN OPINION OF
SHAREHOLDER'S COUNSEL, IN FORM ACCEPTABLE TO THE CORPORATION,  THAT NO VIOLATION
OF SUCH  REGISTRATION  PROVISIONS  WOULD  RESULT FROM ANY  PROPOSED  TRANSFER OR
ASSIGNMENT.

13.  Representations and Warranties

     The Corporation hereby represents and warrants to the holder hereof that:

     (a) during the period this Warrant is  outstanding,  the  Corporation  will
reserve from its  authorized  and unissued  common stock a sufficient  number of
shares to provide for the  issuance of Warrant  Stock upon the  exercise of this
Warrant;

     (b) the issuance of this Warrant  shall  constitute  full  authority to the
Corporation's  officers  who  are  charged  with  the  duty of  executing  stock
certificates to execute and issue the necessary  certificates  for the shares of
Warrant Stock issuable upon exercise of this Warrant;

     (c) the  Corporation has all requisite legal and corporate power to execute
and deliver this  Warrant,  to sell and issue the Warrant  Stock  hereunder,  to
issue the common stock issuable upon exercise of the Warrant Stock




                                      -4-



and to carry out and perform its obligations under the terms of this Warrant;

     (d) all corporate action on the part of the Corporation,  its directors and
shareholders   necessary  for  the   authorization,   execution,   delivery  and
performance  of  this  Warrant  by the  Corporation,  the  authorization,  sale,
issuance and delivery of the Warrant Stock, the grant of registration  rights as
provided herein and the performance of the Corporation's  obligations  hereunder
has been taken;

     (e) the Warrant  Stock,  when issued in compliance  with the  provisions of
this Warrant and the  Corporation's  Articles of  Incorporation  (as they may be
amended from time to time (the "Articles")),  will be validly issued, fully paid
and nonassessable,  and free of all taxes, liens or encumbrances with respect to
the issue thereof,  and will be issued in compliance with all applicable federal
and state securities laws; and

     (f) the issuance of the Warrant Stock will not be subject to any preemptive
rights, rights of first refusal or similar rights.

14.  Corporation

     The  Corporation  will not,  by  amendment  of its  Articles or through any
reorganization,  recapitalization,  transfer of assets,  consolidation,  merger,
dissolution,  issue or sale of securities or any other action,  avoid or seek to
avoid  the  observance  or  performance  of any of the terms to be  observed  or
performed  hereunder  by the  Corporation,  but will at all times in good  faith
assist in the  carrying  out of all the  provisions  of this  Warrant and in the
taking of all such action as may be necessary or appropriate in order to protect
the rights of the holder of the Warrant against impairment.

15.  Governing Law

     This Warrant shall be governed by and construed in accordance with the laws
of the State of Oregon.


     IN WITNESS WHEREOF,  the Corporation has caused this Warrant to be executed
by its duly authorized officers.

Dated: ---------------------, 1999



BIOJECT MEDICAL TECHNOLOGIES INC.



By: ----------------------------------
Name: Michael Temple
Title: Vice President, Chief Financial Officer & Secretary




                                      -5-



                               NOTICE OF EXERCISE

To:  Bioject Medical Technologies Inc.

     (1) The  undersigned  hereby elects to purchase  ________  shares of common
stock of Bioject Medical Technologies Inc. pursuant to the terms of the attached
Warrant,  and tenders herewith  payment of the purchase price in full,  together
with all applicable transfer taxes, if any.

     (2) In  exercising  this  Warrant,  the  undersigned  hereby  confirms  and
acknowledges  that the shares of common stock to be issued upon exercise  hereof
are being  acquired  solely  for the  account  of the  undersigned  and not as a
nominee for any other party,  and for investment,  and that the undersigned will
not offer,  sell or otherwise  dispose of any such shares of common stock except
under circumstances that will not result in a violation of the Securities Act of
1933, as amended, or any state securities laws.

     (3) Please issue a certificate or certificates  representing said shares of
common  stock  in the  name  of the  undersigned  or in  such  other  name as is
specified below:


                        ------------------------------
                                   (Name)


                        ------------------------------
                                  (Address)

     (3) The  undersigned  represents  that  (a) he,  she or it is the  original
purchaser  from  the  Corporation  of the  attached  Warrant  or an  "accredited
investor" within the meaning of Rule 501(a) under the Securities Act of 1933, as
amended and (b) the aforesaid  shares of common stock are being acquired for the
account of the  undersigned for investment and not with a view to, or for resale
in connection  with, the  distribution  thereof and that the  undersigned has no
present intention of distributing or reselling such shares.


- ---------------------------             ----------------------------------------
(Date)                                  (Signature)




                                      -6-



                                 ASSIGNMENT FORM

(To  assign  the  foregoing  Warrant,  execute  this  form and  supply  required
information. Do not use this form to purchase shares.)



     FOR VALUE RECEIVED, the undersigned registered owner of this Warrant hereby
sells,  assigns and transfers unto the Assignee named below all of the rights of
the undersigned  under the within Warrant,  with respect to the number of shares
of common stock of Bioject Medical Technologies Inc. set forth below:

Name of Assignee                    Address                   No. of Shares
- ----------------                    -------                   -------------




and does hereby irrevocably constitute and appoint Attorney  -------------------
to make  such  transfer  on the  books of  Bioject  Medical  Technologies  Inc.,
maintained for the purpose, with full power of substitution in the premises.

     The undersigned  also represents that, by assignment  hereof,  the Assignee
acknowledges  that  this  Warrant  and the  shares  of stock to be  issued  upon
exercise hereof are being acquired for investment and that the Assignee will not
offer,  sell or  otherwise  dispose of this Warrant or any shares of stock to be
issued upon exercise hereof except under  circumstances which will not result in
a violation of the Securities Act of 1933, as amended,  or any state  securities
laws. Further,  the Assignee shall, if requested by the Corporation,  confirm in
writing, in a form satisfactory to the Corporation,  that the shares of stock so
purchased  are  being  acquired  for  investment  and  not  with a  view  toward
distribution or resale.



                                 Dated: ----------------------------------------

                                 Holder's Signature: ---------------------------

                                 Holder's Address:

                                 -----------------------------------------------

                                 -----------------------------------------------

Guaranteed Signature:

NOTE: The signature to this  Assignment Form must correspond with the name as it
appears on the face of the Warrant,  without  alteration or  enlargement  or any
change whatever, and must be guaranteed by a bank or trust company.  Officers of
corporations  and those action in a fiduciary or other  representative  capacity
should file proper evidence of authority to assign the foregoing Warrant.




                                      -7-