AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 16, 2001
                             REGISTRATION NO. 333-

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                    FORM S-8
                             REGISTRATION STATEMENT

                                     UNDER
                           THE SECURITIES ACT OF 1933

                          NEUROCRINE BIOSCIENCES, INC.
              ----------------------------------------------------
             (Exact name of Registrant as specified in its charter)

             DELAWARE                         33-0525145
       ----------------------       ----------------------------------
      (State of incorporation)      (I.R.S. Employer Identification No.)

                           10555 SCIENCE CENTER DRIVE
                          SAN DIEGO, CALIFORNIA 92121
          -----------------------------------------------------------
         (Address, including zip code, of principal executive offices)

       NEUROCRINE BIOSCIENCES, INC. 1992 INCENTIVE STOCK PLAN, AS AMENDED
   NEUROCRINE BIOSCIENCES, INC. 1996 EMPLOYEE STOCK PURCHASE PLAN, AS AMENDED
   --------------------------------------------------------------------------
                            (Full title of the plan)

                                 GARY A. LYONS
                       PRESIDENT, CHIEF EXECUTIVE OFFICER
                                  AND DIRECTOR
                           10555 SCIENCE CENTER DRIVE
                          SAN DIEGO, CALIFORNIA 92121
                                 (858) 658-7600
- -------------------------------------------------------------------------------
(Name, address, and telephone number, including area code, of agent for service)

                                   COPIES TO:

                              SCOTT N. WOLFE, ESQ.
                                LATHAM & WATKINS
                       12636 HIGH BLUFF DRIVE, SUITE 300
                              SAN DIEGO, CA 92130
                                 (858) 523-5400

                         CALCULATION OF REGISTRATION FEE

================================================================================
                                      PROPOSED        PROPOSED
                                      MAXIMUM         MAXIMUM
       TITLE           AMOUNT         OFFERING       AGGREGATE       AMOUNT OF
OF SECURITIES TO        TO BE          PRICE          OFFERING     REGISTRATION
 BE REGISTERED       REGISTERED(1)   PER SHARE(2)      PRICE            FEE
- ------------------- -------------- -------------- --------------- --------------
Common Stock
$0.001 par value        850,000    $ 35.14-36.13   $ 30,482,800      $ 7,621
=================== ============== ============== =============== ==============

(1)  A maximum of 6,800,000  shares of common  stock were  reserved for issuance
     under the Neurocrine Biosciences, Inc. 1992 Incentive Stock Plan (the "1992
     Plan"),  6,050,000  shares of which were  previously  registered  under the
     Securities  Act of 1933,  as amended (the  "Securities  Act"),  pursuant to
     Registration  Statements  on Forms S-8  (File  Nos.  333-14589,  333-31791,
     333-57875,  333-87127 and 333-44012). A maximum of 525,000 shares of common
     stock were reserved for issuance  under the  Neurocrine  Biosciences,  Inc.
     1996 Employee  Stock  Purchase Plan (the "1996  Plan"),  425,000  shares of
     which were  previously  registered  under the Securities  Act,  pursuant to
     Registration  Statements on Forms S-8 (File Nos.  333-14589 and 333-44012).
     All shares reserved for issuance under the 1992 Plan and the 1996 Plan that
     were not previously registered are being registered hereunder.  Pursuant to
     Rule 416(a),  this  Registration  Statement shall also cover any additional
     shares of the  Registrant's  common  stock that become  issuable  under the
     plans by reason of any stock  dividend,  stock split,  recapitalization  or
     other similar  transaction  effected without receipt of consideration  that
     increases  the  number  of the  Registrant's  outstanding  shares of common
     stock.

(2)  This  estimate  is made  pursuant  to Rule  457(h)  solely for  purposes of
     calculating  the  registration  fee,  and is  determined  according  to the
     following offering price information: Of the 850,000 shares of common stock
     being registered hereunder,  (i) 230,000 shares of common stock are subject
     to outstanding  options with an exercise price of $35.14 per share and (ii)
     620,000  shares of common stock are reserved for issuance  upon exercise of
     options to be granted  in the  future.  Pursuant  to Rule  457(h),  for all
     shares of common stock being  registered  hereunder  with an exercise price
     which cannot be presently  determined (620,000 shares of common stock), the
     Proposed  Maximum  Offering Price Per Share, is $36.13 per share,  which is
     the  average of the high and low sales  prices of the  Registrant's  common
     stock as reported on the Nasdaq National Market on July 13, 2001.


PART I INFORMATION REQUIRED IN THE SECTION 10 (A) PROSPECTUS ITEM 1. PLAN INFORMATION. Not required to be filed with this Registration Statement. ITEM 2. REGISTRANT INFORMATION AND EMPLOYEE PLAN ANNUAL INFORMATION. Not required to be filed with this Registration Statement. PART II INFORMATION REQUIRED IN THE REGISTRATION STATEMENT ITEM 3. INCORPORATION OF DOCUMENTS BY REFERENCE. The following documents filed with the Securities and Exchange Commission (the "SEC") by Neurocrine Biosciences, Inc. (the "Company"), are incorporated by reference in this Registration Statement. (a) The Company's Annual Report on Form 10-K for the year ended December 31, 2000, filed March 30, 2001; (b) The Company's Quarterly Report on Form 10-Q for the three months ended March 31, 2001, filed May 4, 2001; (c) All other reports filed by the Company with the SEC since December 31, 2000 pursuant to Sections 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"); (d) The Company's definitive proxy statement dated April 12, 2001 filed in connection with its May 24, 2001 Annual Meeting of Stockholders; and (e) The description of the Company's Common Stock contained the Registration Statement on Form 8-A filed on June 16, 1997. All documents filed by the Company pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this Registration Statement and prior to the filing of a post-effective amendment which indicates that all securities offered have been sold or which deregisters all securities then remaining unsold, are incorporated by reference in this Registration Statement and are a part hereof from the date of filing such documents. Any statement contained in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement. ITEM 4. DESCRIPTION OF SECURITIES. Not applicable. ITEM 5. INTERESTS OF NAMED EXPERTS AND COUNSEL. Not applicable. ITEM 6. INDEMNIFICATION OF DIRECTORS AND OFFICERS. Section 145 of the Delaware General Corporation Law generally allows the Company to indemnify directors and officers for all expenses, judgments, fines and amounts in settlement actually paid and reasonably incurred in connection with any proceedings so long as such party acted in good faith and in a manner reasonably believed to be in or not opposed to the Company's best interests and, with respect to any criminal proceedings, if such party had no reasonable cause to believe his or her conduct to be unlawful. Indemnification may only be made by the Company if the applicable standard of conduct set forth in Section 145 has been met by the indemnified party upon a determination made (i) by the Board of Directors by a majority vote of the directors who are not parties to such proceedings, even though less than a quorum, (ii) if there are no such directors, or if such directors so direct, by independent legal counsel in a written opinion or (iii) by the stockholders. Article VII of the Company's Certificate of Incorporation and Article VI, Sections 6.1, 6.2 and 6.3 of the Company's Bylaws provide for indemnification of its directors and officers, and permit indemnification of employees and other agents to the maximum extent permitted by the Delaware General Corporation Law. In addition, the Company has entered into indemnification agreements with its officers and directors. ITEM 7. EXEMPTION FROM REGISTRATION CLAIMED. Not applicable. ITEM 8. EXHIBITS. The following is a list of exhibits filed as part of this Registration Statement, which are incorporated herein: Exhibit Number Document 4.1(1) Form of Common Stock Certificate 4.2* Neurocrine Biosciences, Inc. 1992 Incentive Stock Option Plan, as amended 4.3* Neurocrine Biosciences, Inc. 1996 Employee Stock Purchase Plan, as amended 5.1* Opinion of Latham & Watkins 23.1* Consent of Ernst & Young LLP, Independent Auditors 23.2* Consent of Latham & Watkins (contained in Exhibit 5.1) 24.1* Power of Attorney (included in the signature page of this Registration Statement) - ----------- * Filed herewith. (1) Incorporated by reference to the Company's Registration Statement filed on April 3, 1996 on Form S-1, as amended (File No. 333-03172). ITEM 9. UNDERTAKINGS. (a) The undersigned Registrant hereby undertakes: (1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement; (i) To include any prospectus required by Section 10(a)(3) of the Securities Act; (ii) To reflect in the prospectus any facts or events arising after the effective date of this Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high and of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20 percent change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective Registration Statement; (iii)To include any material information with respect to the plan of distribution not previously disclosed in this Registration Statement or any material change to such information in this Registration Statement; provided, however, that the undertakings set forth in paragraphs (a)(1)(i) and (a)(1)(ii) above do not apply if the Registration Statement is on Form S-3, Form S-8 or Form F-3, and the information required to be included in a post-effective amendment by those paragraphs is contained in periodic reports filed with or furnished to the SEC by the Registrant pursuant to Section 13 or 15(d) of the Exchange Act that are incorporated by reference in this Registration Statement. (2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. (3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering. (b) The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant's annual report pursuant to Section 13(a) or 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in this Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. (c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue. SIGNATURES Pursuant to the requirements of the Securities Act, the Company certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of San Diego, State of California, on this 16 day of July 2001. NEUROCRINE BIOSCIENCES, INC. By: /s/ Gary A. Lyons ------------------------------------ Gary A. Lyons President and Chief Executive Officer

POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, that each such person whose signature appears below constitutes and appoints, jointly and severally, Gary A. Lyons and Paul W. Hawran his attorneys-in-fact, each with the power of substitution, for him in any and all capacities, to sign any amendments to this Registration Statement on Form S-8 (including post-effective amendments), and to file the same, with all exhibits thereto, and other documents in connection therewith, with the SEC, hereby ratifying and confirming all that each of said attorneys-in-fact, or his substitute or substitutes, may do or cause to be done by virtue hereof. PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT, THIS REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE CAPACITIES AND ON THE DATES INDICATED.

SIGNATURE TITLE DATE /s/ Gary A. Lyons President, Chief Executive Officer July 16, 2001 - ------------------------ and Director (Principal Executive Officer) Gary A. Lyons /s/ Paul W. Hawran Chief Financial Officer (Principal July 16, 2001 - ------------------------ Financing and Accounting Officer) Paul W. Hawran /s/ Joseph A. Mollica Chairman of the Board of Directors July 16, 2001 - ------------------------ Joseph A. Mollica /s/ Richard F. Pops Director July 16, 2001 - ------------------------ Richard F. Pops /s/ Stephen A. Sherwin Director July 16, 2001 - ------------------------ Stephen A. Sherwin /s/ Lawrence J. Steinman Director July 16, 2001 - ------------------------ Lawrence J. Steinman /s/ Wylie W. Vale Director July 16, 2001 - ------------------------ Wylie W. Vale

INDEX TO EXHIBITS Exhibit Number Document 4.1(1) Form of Common Stock Certificate 4.2* Neurocrine Biosciences, Inc. 1992 Incentive Stock Option Plan, as amended 4.3* Neurocrine Biosciences, Inc. 1996 Employee Stock Purchase Plan, as amended 5.1* Opinion of Latham & Watkins 23.1* Consent of Ernst & Young LLP, Independent Auditors 23.2* Consent of Latham & Watkins (contained in Exhibit 5.1) 24.1* Power of Attorney (included in the signature page of this Registration Statement) - ---------- * Filed herewith. (1) Incorporated by reference to the Company's Registration Statement filed on April 3, 1996 on Form S-1, as amended (File No. 333-03172).

                                                                     Exhibit 4.2

                          NEUROCRINE BIOSCIENCES, INC.
                        AMENDED 1992 INCENTIVE STOCK PLAN

                     (as amended May 27, 1997, May 27, 1998,
                  May 21, 1999, May 24, 2000 and May 24, 2001)

1.   Purpose  of the Plan.  The  purposes  of this  Incentive  Stock Plan are to
     attract  and retain the best  available  personnel,  to provide  additional
     incentive to the employees of Neurocrine Biosciences,  Inc. (the "Company")
     and to promote the success of the Company's business.

          Options  granted  hereunder may be either  Incentive  Stock Options or
     Nonstatutory Stock Options, at the discretion of the Board and as reflected
     in the  terms of the  written  option  agreement.  The  Board  also has the
     discretion to grant Stock Purchase Rights.

2.   Definitions.

     (a)  "Board" shall mean the Committee,  if one has been  appointed,  or the
          Board of Directors of the Company, if no Committee is appointed.

     (b)  "Code" shall mean the Internal Revenue Code of 1986, as amended.

     (c)  "Committee"  shall  mean  the  Committee  appointed  by the  Board  of
          Directors  in  accordance  with  Section  4(a) of the Plan,  if one is
          appointed.

     (d)  "Common Stock" shall mean the Common Stock of the Company.

     (e)  "Company" shall mean Neurocrine Biosciences, Inc.

     (f)  "Consultant"  shall mean any  person who is engaged by the  Company or
          any  Parent  or  Subsidiary  to  render  consulting  services  and  is
          compensated  for such  consulting  services,  and any  director of the
          Company whether compensated for such services or not.

     (g)  "Continuous  Status  as an  Employee  or  Consultant"  shall  mean the
          absence of any  interruption  or termination of service as an Employee
          or  Consultant,  as  applicable.  Continuous  Status as an Employee or
          Consultant  shall not be  considered  interrupted  in the case of sick
          leave,  military leave, or any other leave of absence  approved by the
          Board;  provided  that such  leave is for a period of not more than 90
          days or  reemployment  upon the expiration of such leave is guaranteed
          by contract or statute.

     (h)  "Employee" shall mean any persons,  including  officers and directors,
          employed by the Company or any Parent or  Subsidiary  of the  Company.
          The payment of a director's fee by the Company shall not be sufficient
          to constitute "employment" by the Company.

     (i)  "Incentive  Stock Option" shall mean an Option  intended to qualify as
          an  incentive  stock  option  within the meaning of Section 422 of the
          Code.

     (j)  "Nonstatutory  Stock  Option"  shall  mean an Option not  intended  to
          qualify as an Incentive Stock Option.

     (k)  "Option" shall mean a stock option granted pursuant to the Plan.

     (l)  "Optioned  Stock" shall mean the Common Stock  subject to an Option or
          Stock Purchase Right.

     (m)  "Optionee"  shall mean an  Employee  or  Consultant  who  receives  an
          Option.

     (n)  "Parent" shall mean a "parent  corporation,"  whether now or hereafter
          existing, as defined in Section 424(e) of the Code.

     (o)  "Plan" shall mean this 1992 Incentive Stock Plan.

     (p)  "Purchaser" shall mean an Employee or Consultant who exercises a Stock
          Purchase Right.

     (q)  "Share"  shall  mean a share  of the  Common  Stock,  as  adjusted  in
          accordance with Section 11 of the Plan.

     (r)  "Stock  Purchase  Right"  shall mean a right to purchase  Common Stock
          pursuant  to the Plan or the right to receive a bonus of Common  Stock
          for past services.

     (s)  "Subsidiary"  shall mean a  "subsidiary  corporation,"  whether now or
          hereafter existing, as defined in Section 424(f) of the Code.

3.   Stock Subject to the Plan.  Subject to the  provisions of Section 11 of the
     Plan,  the maximum  aggregate  number of shares under the Plan is 6,800,000
     shares of Common  Stock.  The Shares may be  authorized  but  unissued,  or
     reacquired Common Stock.

          If  an  Option  or  Stock  Purchase  Right  should  expire  or  become
     unexercisable  for any reason without  having been exercised in full,  then
     the unpurchased  Shares which were subject  thereto shall,  unless the Plan
     shall have been terminated, become available for future grant or sale under
     the Plan.  Notwithstanding  any other provision of the Plan,  shares issued
     under the Plan and  later  repurchased  by the  Company  shall  not  become
     available for future grant or sale under the Plan.

4.   Administration of the Plan.

     (a)  Procedure.

          (i)  Multiple  Administrative  Bodies. The Plan may be administered by
               different   Committees  with  respect  to  different   groups  of
               Employees and  Consultants.  (ii) Section  162(m).  To the extent
               that the  Administrator  determines it to be desirable to qualify
               Options  granted  hereunder as  "performance-based  compensation"
               within the meaning of Section  162(m) of the Code, the Plan shall
               be administered by a Committee of two or more "outside directors"
               within the meaning of Section 162(m) of the Code.

          (iii)Rule  16b-3.  To the extent  desirable  to  qualify  transactions
               hereunder   as  exempt   under  Rule  16b-3,   the   transactions
               contemplated   hereunder  shall  be  structured  to  satisfy  the
               requirements for exemption under Rule 16b-3.

          (iv) Other  Administration.  Other than as  provided  above,  the Plan
               shall be administered by (A) the Board or (B) a Committee,  which
               committee shall be constituted to satisfy applicable laws.

     (b)  Powers of the Board.  Subject to the provisions of the Plan, the Board
          shall have the authority, in its discretion:

          (i)  to grant Incentive Stock Options,  Nonstatutory  Stock Options or
               Stock Purchase Rights;

          (ii) to  determine,   upon  review  of  relevant  information  and  in
               accordance  with Section 7 of the Plan,  the fair market value of
               the Common Stock;

          (iii)to  determine  the  exercise  price per share of Options or Stock
               Purchase  Rights,  to be granted,  which  exercise price shall be
               determined in accordance with Section 7 of the Plan;

          (iv) to determine the Employees or  Consultants  to whom, and the time
               or times at which,  Options  or Stock  Purchase  Rights  shall be
               granted and the number of shares to be represented by each Option
               or Stock Purchase Right;

          (v)  to interpret the Plan;

          (vi) to prescribe, amend and rescind rules and regulations relating to
               the Plan;

          (vii)to determine  the terms and  provisions  of each Option and Stock
               Purchase  Right granted  (which need not be identical)  and, with
               the consent of the holder thereof, modify or amend any provisions
               (including  provisions  relating to exercise price) of any Option
               or Stock Purchase Right;

          (viii) to  accelerate  or defer (with the consent of the Optionee) the
               exercise date of any Option,  consistent  with the  provisions of
               Section 5 of the Plan;

          (ix) to  authorize  any person to execute on behalf of the Company any
               instrument required to effectuate the grant of an Option or Stock
               Purchase Right previously granted by the Board;

          (x)  to allow  Optionees to satisfy  withholding  tax  obligations  by
               electing  to have the  Company  withhold  from the  Shares  to be
               issued upon  exercise of an Option or Stock  Purchase  Right that
               number of Shares  having a Fair Market  Value equal to the amount
               required to be  withheld.  The Fair Market Value of the Shares to
               be withheld  shall be  determined  on the date that the amount of
               tax to be  withheld  is to be  determined.  All  elections  by an
               Optionee to have Shares  withheld for this purpose  shall be made
               in such form and under such conditions as the  Administrator  may
               deem necessary or advisable; and

          (xi) to make all other  determinations  deemed  necessary or advisable
               for the administration of the Plan.

     (c)  Effect  of  Board's  Decision.   All  decisions,   determinations  and
          interpretations  of the  Board  shall  be  final  and  binding  on all
          Optionees,  Purchasers  and any other  holders of any Options or Stock
          Purchase Rights granted under the Plan.

5.   Eligibility.

     (a)  Options  and Stock  Purchase  Rights may be granted to  Employees  and
          Consultants, provided that Incentive Stock Options may only be granted
          to Employees. An Employee or Consultant who has been granted an Option
          or Stock  Purchase  Right  may,  if such  Employee  or  Consultant  is
          otherwise eligible,  be granted additional Option(s) or Stock Purchase
          Right(s).

     (b)  Each Option shall be  designated  in the written  option  agreement as
          either an  Incentive  Stock  Option or a  Nonstatutory  Stock  Option.
          However,  notwithstanding  such  designation,  to the extent  that the
          aggregate  fair  market  value of the  Shares  with  respect  to which
          Options  designated as Incentive Stock Options are exercisable for the
          first time by any Optionee  during any calendar  year (under all plans
          of the Company)  exceeds  $100,000,  such Options  shall be treated as
          Nonstatutory Stock Options.

     (c)  For purposes of Section  5(b),  Options shall be taken into account in
          the order in which they were granted, and the fair market value of the
          Shares shall be  determined  as of the time the Option with respect to
          such Shares is granted.

     (d)  The Plan  shall  not  confer  upon any  Optionee  or holder of a Stock
          Purchase Right any right with respect to continuation of employment by
          or the rendition of consulting  services to the Company,  nor shall it
          interfere in any way with his or her right or the  Company's  right to
          terminate  his or her  employment  or  services  at any time,  with or
          without cause.

     (e)  The  following  limitations  shall  apply  to  grants  of  Options  to
          Employees:

          (i)  No Employee shall be granted,  in any fiscal year of the Company,
               Options to purchase more than 250,000 Shares.

          (ii) In connection with his or her initial employment, an Employee may
               be granted Options to purchase up to an additional 250,000 Shares
               which shall not count  against the limit set forth in  subsection
               (i) above.


          (iii)The foregoing  limitations shall be adjusted  proportionately  in
               connection  with any change in the  Company's  capitalization  as
               described in Section 11.

          (iv) If an Option is  canceled  in the same fiscal year of the Company
               in  which  it  was  granted  (other  than  in  connection  with a
               transaction  described in Section 12), the canceled  Option shall
               be counted  against the limit set forth in subsection  (i) above.
               For this purpose,  if the exercise price of an Option is reduced,
               such reduction  will be treated as a  cancellation  of the Option
               and the grant of a new Option.

6.   Term of Plan. The Plan shall become  effective upon the earlier to occur of
     its  adoption by the Board of  Directors or its approval by vote of holders
     of a majority of the outstanding  shares of the Company entitled to vote on
     the  adoption  of the Plan.  It shall  continue in effect for a term of ten
     (10) years unless sooner terminated under Section 13 of the Plan.

7.   Exercise Price and Consideration.

     (a)  The per Share exercise  price for the Shares to be issued  pursuant to
          exercise of an Option or Stock  Purchase  Right shall be such price as
          is determined by the Board, but shall be subject to the following:

          (i)  In the case of an  Incentive  Stock  Option;  (A)  granted  to an
               Employee  who,  at the  time of  grant  of such  Incentive  Stock
               Option,  owns stock  representing  more than ten percent (10%) of
               the voting  power of all  classes of stock of the  Company or any
               Parent or  Subsidiary,  the per Share  exercise price shall be no
               less than 110% of the fair market  value per Share on the date of
               grant. (B) granted to any other Employee,  the per Share exercise
               price  shall be no less  than 100% of the fair  market  value per
               Share on the date of grant.

          (ii) In the case of a  Nonstatutory  Stock Option or a Stock  Purchase
               Right,  the per Share exercise price shall be no less than 85% of
               the fair market value per Share on the date of grant. In the case
               of  a   Nonstatutory   Stock   Option   intended  to  qualify  as
               "performance-based  compensation"  within the  meaning of Section
               162(m) of the Code, the per Share exercise price shall be no less
               than  100% of the  Fair  Market  Value  per  Share on the date of
               grant.

          (iii)Notwithstanding the foregoing,  Options may be granted with a per
               Share  exercise  price of less than 100% of the Fair Market Value
               per  Share  on the date of grant  pursuant  to a merger  or other
               corporate transaction.

               For purposes of this Section 7(a), in the event that an Option or
          Stock Purchase Right is amended to reduce the exercise price, the date
          of grant of such Option or Stock  Purchase  Right shall  thereafter be
          considered to be the date of such amendment.

     (b)  The  fair  market  value  shall  be  determined  by the  Board  in its
          discretion; provided, however, that where there is a public market for
          the Common Stock, the fair market value per Share shall be the mean of
          the bid and asked prices (or the closing price per share if the Common
          Stock is listed on the  National  Association  of  Securities  Dealers
          Automated  Quotation  ("NASDAQ") National Market System) of the Common
          Stock for the date of grant,  as reported  in the Wall Street  Journal
          (or, if not so reported,  as otherwise  reported by the NASDAQ System)
          or, in the event the Common Stock is listed on a stock  exchange,  the
          fair  market  value  per  Share  shall  be the  closing  price on such
          exchange on the date of grant of the Option or Stock  Purchase  Right,
          as reported in the Wall Street Journal.

     (c)  The consideration to be paid for the Shares to be issued upon exercise
          of an Option or Stock Purchase Right, including the method of payment,
          shall be  determined  by the  Board  (and in the case of an  Incentive
          Stock  Option,  shall  be  determined  at the time of  grant)  and may
          consist  entirely of cash,  check,  promissory  note,  other Shares of
          Common Stock which

          (i)  either  have  been  owned by the  Optionee  for more than six (6)
               months on the date of surrender or were not acquired  directly or
               indirectly, from the Company, and

          (ii) have a fair market  value on the date of  surrender  equal to the
               aggregate  exercise  price of the Shares as to which said  Option
               shall  be  exercised,  or any  combination  of  such  methods  of
               payment,  or such other  consideration  and method of payment for
               the issuance of Shares to the extent permitted under Sections 408
               and 409 of the California General  Corporation Law. In making its
               determination  as to the type of  consideration  to  accept,  the
               Board shall consider if acceptance of such  consideration  may be
               reasonably expected to benefit the Company (Section 315(b) of the
               California General Corporation Law).

8.   Options.

     (a)  Term of Option.  The term of each  Option  shall be the term stated in
          the Option  Agreement;  provided,  however,  that the term shall be no
          more than ten (10) years from the date of grant  thereof.  In the case
          of an Incentive  Stock Option  granted to an Optionee who, at the time
          the Option is granted,  owns stock  representing more than ten percent
          (10%) of the voting  power of all  classes of stock of the  Company or
          any Parent or  Subsidiary,  the term of the  Option  shall be five (5)
          years from the date of grant  thereof or such  shorter  term as may be
          provided in the Option Agreement.

     (b)  Exercise of Option.

          (i)  Procedure  for  Exercise;  Rights as a  Shareholder.  Any  Option
               granted  hereunder  shall be  exercisable at such times and under
               such conditions as determined by the Board, including performance
               criteria with respect to the Company and/or the Optionee,  and as
               shall be permissible  under the terms of the Plan, but in no case
               at a rate of less than 20% per year over five (5) years  from the
               date the Option is granted.

               An Option may not be exercised for a fraction of a Share.

                    An  Option  shall be  deemed to be  exercised  when  written
               notice  of  such  exercise  has  been  given  to the  Company  in
               accordance with the terms of the Option by the person entitled to
               exercise  the Option and full payment for the Shares with respect
               to  which  the  Option  is  exercised  has been  received  by the
               Company. Full payment may, as authorized by the Board, consist of
               any consideration and method of payment allowable under Section 7
               of, the Plan. Until the issuance (as evidenced by the appropriate
               entry  on the  books  of  the  Company  or of a  duly  authorized
               transfer   agent  of  the  Company)  of  the  stock   certificate
               evidencing  such Shares no right to vote or receive  dividends or
               any other rights as a shareholder shall exist with respect to the
               Optioned Sock,  notwithstanding  the exercise of the Option.  The
               Company   shall  issue  (or  cause  to  be  issued)   such  stock
               certificate  promptly upon  exercise of the Option.  In the event
               that the  exercise of a  Nonstatutory  Stock  Option  pursuant to
               Section  5(b),   the  Company   shall  issue  a  separate   stock
               certificate  evidencing  the  Shares  treated  as  acquired  upon
               exercise  of an  Incentive  Stock  Option  and a  separate  stock
               certificate  evidencing  the  Shares  treated  as  acquired  upon
               exercise of a  Nonstatutory  Stock Option and shall identify each
               such certificate  accordingly in its stock transfer  records.  No
               adjustment  will be made for a dividend  or other right for which
               the  record  date is prior to the date the stock  certificate  is
               issued, except as provided in Section 11 of the Plan.

                    Exercise  of an  Option  in any  manner  shall  result  in a
               decrease  in  the  number  of  Shares  which  thereafter  may  be
               available,  both for  purposes of the Plan and for sale under the
               Option,  by the  number  of  Shares  as to which  the  Option  is
               exercised.

          (ii) Termination of Status as an Employee or Consultant.  In the event
               of termination of an Optionee's  Continuous Status as an Employee
               or  Consultant  (as the case may be), such Optionee may, but only
               within such period of time as is  determined  by the Board,  with
               such  determination  in the case of an Incentive Stock Option not
               exceeding three (3) months and in the case of Nonstatutory  Stock
               Option  not   exceeding   six  (6)  months   after  the  date  of
               termination,  with such determination in the case of an Incentive
               Stock  Option  being  made at the time of  grant  of the  Option,
               exercise  the  Option  to  the  extent  that  such   Employee  or
               Consultant  was  entitled  to  exercise  it at the  date  of such
               termination (but in no event later than the date of expiration of
               the term of such Option as set forth in the Option Agreement). To
               the extent that such Employee or  Consultant  was not entitled to
               exercise the Option at the date of such  termination,  or if such
               Employee or Consultant  does not exercise such Option (which such
               Employee or Consultant was entitled to exercise)  within the time
               specified herein, the Option shall terminate.

          (iii)Disability  of  Optionee.   Notwithstanding   the  provisions  of
               Section  8(b)(ii)  above,  in  the  event  of  termination  of an
               Optionee's  Continuous  Status as an Employee or  Consultant as a
               result of such  Employee's  or  Consultant's  total and permanent
               disability  (as defined in Section  22(e)(3)  of the Code),  such
               Employee or  Consultant  may,  but only within six (6) months (or
               such other period of time not exceeding  twelve (12) months as in
               determined by the Board,  with such  determination in the case of
               an  Incentive  Stock Option being made at the time of gant of the
               Option) from the date of such  termination (but in no event later
               than the date of  expiration  of the term of such  Option  as set
               forth in the Option Agreement), exercise the Option to the extent
               such  Employee or  Consultant  was entitled to exercise it at the
               date of such  termination.  To the extent  that such  Employee or
               Consultant was not entitled to exercise the Option at the date of
               termination,  or if such Employee or Consultant does not exercise
               such Option (which such  Employee or  Consultant  was entitled to
               exercise)  within the time  specified  herein,  the Option  shall
               terminate.

          (iv) Death of Optionee. In the event of the death of an Optionee:

               (A)  during  the term of the  Option who is at the time of his or
                    her death an Employee or  Consultant  of the Company and who
                    shall  have  been in  Continuous  Status as an  Employee  or
                    Consultant since the date of grant of the Option, the Option
                    may be exercised,  at any time within six (6) months (but in
                    no event  later than the date of  expiration  of the term of
                    such  Option as set forth in the Option  Agreement),  by the
                    Optionee's  estate or by a person who  acquired the right to
                    exercise the Option by bequest or  inheritance,  but only to
                    the extent that the right to exercise would have accrued had
                    the Optionee  continued  living and  remained in  Continuous
                    Status as an Employee or Consultant  six (6) months (or such
                    other  period of time as in  determined  by the Board at the
                    time of grant of the Option) after the date of death; or

               (B)  within  thirty  (30) days (or such other  period of time not
                    exceeding  three (3) months as is  determined  by the Board,
                    with such  determination  in the case of an Incentive  Stock
                    Option being made at the time of grant of the Option)  after
                    the  termination  of  Continuous  Status as an  Employee  or
                    Consultant,  the Option may be exercised, at any time within
                    six  (6)  months  (or  such  other  period  of  time  as  is
                    determined  by the Board at the time of grant of the Option)
                    following  the date of death (but in no event later than the
                    date of  expiration  of the term of such Option as set forth
                    in the Option  Agreement),  by the Optionee's estate or by a
                    person  who  acquired  the right to  exercise  the Option by
                    bequest or inheritance,  but only to the extent of the right
                    to exercise that had accrued at the date of termination.

9.   Stock Purchase Rights.

     (a)  Rights to Purchase.  After the Board of Directors  determines  that it
          will offer an Employee or Consultant a Stock Purchase  Right, it shall
          deliver  to the  offeree a stock  purchase  agreement  or stock  bonus
          agreement, as the case may be, setting forth the terms, conditions and
          restrictions  relating  to the offer,  including  the number of Shares
          which such person shall be entitled to  purchase,  and the time within
          which such person  must  accept  such  offer,  which shall in no event
          exceed six (6) months from the date upon which the Board of  Directors
          or its Committee  made the  determination  to grant the Stock Purchase
          Right.  The offer shall be accepted by execution  of a stock  purchase
          agreement or stock bonus agreement in the from determined by the Board
          of Directors.

     (b)  Issuance  of Shares.  Forthwith  after  payment  therefor,  the Shares
          purchased shall be duly issued; provided,  however, that the Board may
          require that the Purchaser make adequate provision for any Federal and
          State  withholding  obligations  of the Company as a condition  to the
          Purchaser purchasing such Shares.

     (c)  Repurchase Option.  Unless the Board determines  otherwise,  the stock
          purchase  agreement or stock bonus agreement shall grant the Company a
          repurchase  option  exercisable  upon  the  voluntary  or  involuntary
          termination  of the  Purchaser's  employment  with the Company for any
          reason  (including  death or disability).  If the Board so determines,
          the purchase price for shares  repurchased may be paid by cancellation
          of any  indebtedness  of the Purchaser to the Company.  The repurchase
          option shall lapse at such rate as the Board may determine.

     (d)  Other  Provisions.   The  stock  purchase  agreement  or  stock  bonus
          agreement  shall contain such other terms,  provisions  and conditions
          not  inconsistent  with the Plan as may be  determined by the Board of
          Directors.

10.  Non-Transferability of Options and Stock Purchase Rights. Unless determined
     otherwise by the  Administrator,  an Option or Stock Purchase Right may not
     be sold, pledged, assigned,  hypothecated,  transferred,  or disposed of in
     any manner other than by will or by the laws of descent or distribution and
     may be  exercised,  during  the  lifetime  of  the  Optionee,  only  by the
     Optionee.  If the  Administrator  makes an Option or Stock  Purchase  Right
     transferable,  such  Option or Stock  Purchase  Right  shall  contain  such
     additional terms and conditions as the Administrator deems appropriate.

11.  Adjustments upon Changes in Capitalization or Merger.

     (a)  Changes  in  Capitalization.  Subject  to any  required  action by the
          shareholders  of the  Company,  the  number of shares of Common  Stock
          covered by each  outstanding  Option or Stock Purchase Right,  and the
          number of  shares  of Common  Stock  which  have been  authorized  for
          issuance  under the Plan but as to which no Options or Stock  Purchase
          Rights have yet been  granted or which have been  returned to the Plan
          upon  cancellation or expiration of an Option or Stock Purchase Right,
          as well as the price per share of Common  Stock  covered  by each such
          outstanding  Option or Stock Purchase Right,  shall be proportionately
          adjusted for any  increase or decrease in the number of issued  shares
          of Common Stock  resulting  from a stock split,  reverse  stock split,
          stock dividend,  combination or  reclassification of the Common Stock,
          or any other  increase or  decrease in the number of issued  shares of
          Common Stock effected without receipt of consideration by the Company.
          The conversion of any convertible  securities of the Company shall not
          be deemed to have been "effected  without  receipt of  consideration."
          Such adjustment  shall be made by the Board,  whose  determination  in
          that  respect  shall be  final,  binding  and  conclusive.  Except  as
          expressly  provided  herein,  no  issuance by the Company of shares of
          stock of any class, or securities  convertible into shares of stock of
          any class,  shall affect, and no adjustment by reason thereof shall be
          made with  respect  to, the number or price of shares of Common  Stock
          subject to an Option or Stock Purchase Right.

     (b)  Dissolution or Liquidation.  In the event of the proposed  dissolution
          or  liquidation  of the Company,  the  Administrator  shall notify the
          Optionee  or  Purchaser  at  least  fifteen  (15)  days  prior to such
          proposed action.  To the extent it has not been previously  exercised,
          the Option or Stock Purchase Right shall terminate  immediately  prior
          to the consummation of such proposed action.

     (c)  Merger  or  Asset  Sale.  In the  event  of a  merger,  sale of all or
          substantially all of the assets of the Company,  tender offer or other
          transaction or series of related transactions resulting in a change of
          ownership  of more than 50% of the voting  securities  of the  Company
          ("Change in Control"),  approved by the majority of the members of the
          Board  on the  Board  prior  to the  commencement  of such  Change  in
          Control,  each  outstanding  Option shall be assumed or an  equivalent
          option or right  substituted by the successor  corporation or a Parent
          or Subsidiary of the successor  corporation;  provided however, in the
          event that within one year of the date of the completion of the Change
          in Control, the successor corporation or a Parent or Subsidiary of the
          successor corporation terminates the employment of an Optionee without
          Cause (as defined  below),  such Optionee shall fully vest in and have
          the right to  exercise  the  options  assumed or  substituted  for the
          Option as to all of the Optioned Stock,  including  Shares as to which
          it would not otherwise be exercisable. In the event that the successor
          corporation  refuses  to  assume or  substitute  for the  Option,  the
          Optionee shall fully vest in and have the right to exercise the Option
          as to all of the Optioned Stock, including Shares as to which it would
          not otherwise be  exercisable.  If an Option  becomes fully vested and
          exercisable  in lieu of assumption or  substitution  in the event of a
          Change of Control,  the  Administrator  shall  notify the  Optionee in
          writing or  electronically  that the Option  shall be fully vested and
          exercisable  for a period of  fifteen  (15) days from the date of such
          notice,  and the Option shall  terminate  upon the  expiration of such
          period.  For the  purposes  of this  paragraph,  the  Option  shall be
          considered  assumed if,  following  the Change of Control,  the option
          confers  the  right to  purchase,  for each  Share of  Optioned  Stock
          subject to the Option immediately prior to the Change in Control,  the
          consideration  (whether stock,  cash, or other securities or property)
          received in the Change of Control by holders of Common  Stock for each
          Share held on the effective  date of the  transaction  (and if holders
          were  offered a choice  of  consideration,  the type of  consideration
          chosen  by the  holders  of a  majority  of the  outstanding  Shares);
          provided,  however, that if such consideration  received in the Change
          of Control is not solely common stock of the successor  corporation or
          its Parent,  the Administrator  may, with the consent of the successor
          corporation,  provide for the  consideration  to be received  upon the
          exercise of the Option,  for each Share of Optioned  Stock  subject to
          the Option, to be solely common stock of the successor  corporation or
          its Parent equal in fair market  value to the per share  consideration
          received  by holders of Common  Stock in the  Change of  Control.  For
          purposes of this  paragraph,  termination  shall be for "Cause" in the
          event of the occurrence of any of the following:  (a) any  intentional
          action or  intentional  failure to act by employee which was performed
          in  bad  faith  and  to  the  material   detriment  of  the  successor
          corporation  or its Parent or Subsidiary;  (b) employee  willfully and
          habitually  neglects  the duties of  employment;  or (c)  employee  is
          convicted of a felony crime involving moral  turpitude,  provided that
          in the event  that any of the  foregoing  events is  capable  of being
          cured,  the successor  corporation  or its Parent or Subsidiary  shall
          provide  written notice to the employee  describing the nature of such
          event and the employee shall thereafter have five (5) business days to
          cure such event.

               In the event of a Change in Control  which is not approved by the
          majority  of the  members  of the  Board  on the  Board  prior  to the
          commencement of a Change in Control, each Optionee shall fully vest in
          and have the right to exercise  all  outstanding  Options as to all of
          the  Optioned  Stock,  including  Shares  as to  which  it  would  not
          otherwise be exercisable.

12.  Date of Granting Options.  The date of grant of an Option or Stock Purchase
     Right  shall,  for all  purposes,  be the date on which the Board makes the
     determination  granting such Option or stock Purchase Right.  Notice of the
     determination  shall be given to each  Employee  or  Consultant  to whom an
     Option or Stock Purchase Right is so granted within a reasonable time after
     the date of such grant.

13.  Amendment and Termination of the Plan.

     (a)  Amendment and Termination.  The  Administrator  may at any time amend,
          alter, suspend or discontinue the Plan, but no amendment,  alteration,
          suspension  or  discontinuation  shall be made which would  impair the
          rights of any Optionee under any grant theretofore  made,  without his
          or her consent. In addition,  to the extent necessary and desirable to
          comply with Section 422 of the Code (or any other  Applicable  Laws or
          regulation,  the  requirements  of the  NASD or an  established  stock
          exchange),  the Company shall obtain shareholder  approval of any Plan
          amendment in such a manner and to such a degree as required.

     (b)  Effect of Amendment or Termination.  Any such amendment or termination
          of the Plan shall not affect Options or Stock Purchase  Rights already
          granted,  and such Options and Stock  Purchase  Rights shall remain in
          full  force  and  effect  as if this  Plan  had not  been  amended  or
          terminated,  unless mutually agreed otherwise between the Optionee and
          the  Administrator,  which  agreement must be in writing and signed by
          the Optionee and the Company.

14.  Conditions Upon Issuance of Shares.  Shares shall not be issued pursuant to
     the exercise of an Option or Stock  Purchase  Rights unless the exercise of
     such Option or Stock Purchase  Rights and the issuance and delivery of such
     Shares pursuant  thereto shall comply with all relevant  provisions of law,
     including,  without limitation, the Securities Act of 1933, as amended, the
     Exchange Act, the rules and  regulations  promulgated  thereunder,  and the
     requirements  of any  stock  exchange  upon  which the  Shares  may then be
     listed,  and shall be further  subject to the  approval  of counsel for the
     Company with respect to such compliance.

          As a condition to the exercise of an Option or Stock  Purchase  Right,
     the Company may require the person exercising such Option or Stock Purchase
     Right to represent  and warrant at the time of any such  exercise  that the
     Shares are being  purchased  only for  investment  and  without any present
     intention to sell or  distribute  such Shares if, in the opinion of counsel
     for  the  Company,  such  a  representation  is  required  by  any  of  the
     aforementioned relevant provisions of law.

15.  Reservation of Shares.  The Company,  during the term of this Plan, will at
     all times  reserve  and keep  available  such  number of Shares as shall be
     sufficient to satisfy the requirements of the Plan.

          The inability of the Company to obtain  authority  from any regulatory
     body  having  jurisdiction,  which  authority  is deemed  by the  Company's
     counsel  to be  necessary  to the  lawful  issuance  and sale of any Shares
     hereunder,  shall  relieve the Company of any  liability  in respect of the
     failure to issue or sell such Shares as to which such  requisite  authority
     shall not have been obtained.

16.  Option,  Stock  Purchase  and  Stock  Bonus  Agreements.  Options  shall be
     evidenced  by written  option  agreements  in such form as the Board  shall
     approve.  Upon the exercise of Stock Purchase  Rights,  the Purchaser shall
     sign a stock  purchase  agreement or stock bonus  agreement in such form as
     the Board shall approve.

17.  Shareholder Approval.  Continuance of the Plan shall be subject to approval
     by the  shareholders  of the Company  within  twelve (12) months  before or
     after the date the Plan is  adopted.  Such  shareholder  approval  shall be
     obtained in the degree and manner  required under  Applicable  Laws and the
     rules of any stock exchange upon which the Common Stock is listed.

18.  Information to Optionees and Purchasers.  The Company shall provide to each
     Optionee  and  Purchaser,  during the period  for which  such  Optionee  or
     Purchaser has one or more Options to Stock Purchase Rights  outstanding,  a
     balance sheet and an income statement at least annually.  The Company shall
     not be required to provide such  information to key employees  whose duties
     in  connection   with  the  Company   assure  there  access  to  equivalent
     information.





                                                                     Exhibit 4.3

                          NEUROCRINE BIOSCIENCES, INC.

                        1996 EMPLOYEE STOCK PURCHASE PLAN

            (AS AMENDED MAY 24, 2000, MAY 24, 2001 AND JUNE 15, 2001)




     The following constitute the provisions of the 1996 Employee Stock Purchase
Plan of Neurocrine Biosciences, Inc.

1.   Purpose. The purpose of the Plan is to provide employees of the Company and
     its Designated Subsidiaries with an opportunity to purchase Common Stock of
     the Company through accumulated payroll deductions.  It is the intention of
     the Company to have the Plan qualify as an "Employee  Stock  Purchase Plan"
     under  Section 423 of the Internal  Revenue Code of 1986,  as amended.  The
     provisions of the Plan, accordingly, shall be construed so as to extend and
     limit  participation  in a manner  consistent with the requirements of that
     section of the Code.

2.   Definitions.

     (a)  "Board" shall mean the Board of Directors of the Company.

     (b)  "Code" shall mean the Internal Revenue Code of 1986, as amended.

     (c)  "Common Stock" shall mean the Common Stock of the Company.

     (d)  "Company" shall mean Neurocrine  Biosciences,  Inc. and any Designated
          Subsidiary of the Company.

     (e)  "Compensation" shall mean all regular straight time gross earnings but
          shall  exclude  variable   compensation  for  field  sales  personnel,
          incentive bonuses,  overtime,  shift premium,  lead pay and automobile
          allowances and other compensation.

     (f)  "Designated  Subsidiaries" shall mean the Subsidiaries which have been
          designated  by the Board from time to time in its sole  discretion  as
          eligible to participate in the Plan.

     (g)  "Employee" shall mean any individual who is an Employee of the Company
          for tax purposes  whose  customary  employment  with the Company is at
          least  twenty  (20) hours per week and more than five (5)  consecutive
          months in any calendar  year. For purposes of the Plan, the employment
          relationship   shall  be  treated  as  continuing   intact  while  the
          individual is on sick leave or other leave of absence  approved by the
          Company.   Where  the  period  of  leave   exceeds  90  days  and  the
          individual's right to reemployment is not guaranteed either by statute
          or by contract,  the  employment  relationship  will be deemed to have
          terminated on the 91st day of such leave.


     (h)  "Enrollment Date" shall mean the first day of each Offering Period.

     (i)  "Exercise  Date"  shall  mean the last  Trading  Day of each  Purchase
          Period.  The first  Exercise  Date shall be the last Trading Day on or
          before December 31, 1996.

     (j)  "Fair Market  Value" shall mean,  as of any date,  the value of Common
          Stock determined as follows:

     (i)  If the Common Stock is listed on any  established  stock exchange or a
          national  market  system,  including  without  limitation  the  Nasdaq
          National  Market of the National  Association  of Securities  Dealers,
          Inc.  Automated  Quotation  ("NASDAQ")  System,  its Fair Market Value
          shall be the closing  sale price for the Common  Stock (or the mean of
          the  closing  bid and asked  prices,  if no sales were  reported),  as
          quoted on such exchange (or the exchange  with the greatest  volume of
          trading in Common Stock) or system on the date of such  determination,
          as  reported in The Wall  Street  Journal or such other  source as the
          Board deems  reliable,  or; (ii) If the Common  Stock is quoted on the
          NASDAQ System (but not on the National Market thereof) or is regularly
          quoted by a recognized  securities  dealer but selling  prices are not
          reported,  its Fair Market  Value shall be the mean of the closing bid
          and  asked   prices  for  the  Common   Stock  on  the  date  of  such
          determination,  as reported  in The Wall Street  Journal or such other
          source as the Board  deems  reliable,  or;  (iii) In the absence of an
          established market for the Common Stock, the Fair Market Value thereof
          shall be determined  in good faith by the Board.  (iv) For purposes of
          the  Enrollment  Date of the first  Offering  Period,  the Fair Market
          Value of the Common Stock shall be the Price to Public as set forth in
          the final prospectus filed with the Securities and Exchange Commission
          pursuant to Rule 424 under the Securities Act of 1933, as amended.

     (k)  "Offering  Period" shall mean the period of approximately  twelve (12)
          months  during  which an option  granted  pursuant  to the Plan may be
          exercised,  commencing  on the first Trading Day on or after January 1
          and July 1 of each year and terminating on the last Trading Day in the
          periods  ending  up to  one-year  later  (provided  however  that  any
          employee  with an Offering  Period  beginning on or before  January 1,
          2001, shall have an initial  Offering Period of up to two-years).  The
          first day of the first Offering  Period shall be the effective date of
          the  Company's  initial  public  offering of its Common  Stock that is
          registered with the Securities and Exchange  Commission.  The duration
          and timing of Offering Periods may be changed pursuant to Section 4 of
          this Plan.

     (l)  "Plan" shall mean this  Neurocrine  Biosciences,  Inc.  1996  Employee
          Stock Purchase Plan as amended hereby.

     (m)  "Purchase  Price" shall mean an amount equal to 85% of the Fair Market
          Value of a share of  Common  Stock  on the  Enrollment  Date or on the
          Exercise Date, whichever is lower.

     (n)  "Purchase  Period"  shall  mean  the  approximately  six-month  period
          commencing  after one Exercise  Date and ending with the next Exercise
          Date,  except that the first  Purchase  Period of any Offering  Period
          shall  begin on the  Enrollment  Date  and end with the next  Exercise
          Date.  The first Purchase  Period of the first  Offering  Period shall
          begin on the first day of the first  Offering  Period and shall end on
          the first Exercise Date.

     (o)  "Reserves"  shall mean the number of shares of Common Stock covered by
          each option under the Plan which have not yet been  exercised  and the
          number of  shares  of Common  Stock  which  have been  authorized  for
          issuance under the Plan but not yet placed under option.

     (p)  "Subsidiary" shall mean a corporation,  domestic or foreign,  of which
          not less than 50% of the voting  shares  are held by the  Company or a
          Subsidiary, whether or not such corporation now exists or is hereafter
          organized  or acquired by the Company or a  Subsidiary.  (q)  "Trading
          Day"  shall  mean a day on  which  national  stock  exchanges  and the
          National   Association  of  Securities  Dealers  Automated   Quotation
          (NASDAQ) System are open for trading.

3.   Eligibility.

     (a)  Any  Employee (as defined in Section  2(g)),  who shall be employed by
          the  Company  on  a  given   Enrollment  Date  shall  be  eligible  to
          participate in the Plan.

     (b)  Any  provisions  of the  Plan  to  the  contrary  notwithstanding,  no
          Employee shall be granted an option under the Plan (i) if, immediately
          after the grant,  such Employee (or any other person whose stock would
          be attributed to such Employee pursuant to Section 424(d) of the Code)
          would own capital stock of the Company and/or hold outstanding options
          to purchase  such stock  possessing  five  percent (5%) or more of the
          total  combined  voting  power or value of all  classes of the capital
          stock of the  Company  or of any  Subsidiary,  or (ii) if such  option
          permits his or her rights to purchase  stock under all employee  stock
          purchase plans of the Company and its subsidiaries to accrue at a rate
          which exceeds  twenty-five  thousand dollars  ($25,000) worth of stock
          (determined  at the fair  market  value of the shares at the time such
          option is  granted)  for each  calendar  year in which such  option is
          outstanding at any time.

4.   Offering Periods. The Plan shall be implemented by consecutive, overlapping
     Offering  Periods with a new Offering Period beginning on the first Trading
     Day on or after July 1 and  January 1 each  year,  or on such other date as
     the Board shall  determine,  and continuing  thereafter until terminated in
     accordance  with  Section  19 hereof.  The first day of the first  Offering
     Period shall be the effective date of the Company's initial public offering
     of its Common Stock that is  registered  with the  Securities  and Exchange
     Commission.  The  Board  shall  have the power to change  the  duration  of
     Offering Periods (including the commencement dates thereof) with respect to
     future offerings without  stockholder  approval if such change is announced
     at least  five  (5) days  prior to the  scheduled  beginning  of the  first
     Offering Period to be affected thereafter.

5.   Participation.

     (a)  An  eligible  Employee  may  become  a  participant  in  the  Plan  by
          completing a subscription  agreement authorizing payroll deductions in
          the form of  Exhibit A to this Plan and  filing it with the  Company's
          payroll office prior to the applicable Enrollment Date.

     (b)  Payroll  deductions  for a  participant  shall  commence  on the first
          payroll date following the  Enrollment  Date and shall end on the last
          payroll date in the  Offering  Period to which such  authorization  is
          applicable, unless sooner terminated by the participant as provided in
          Section 10 hereof.

6.   Payroll Deductions.

     (a)  At the time a participant files his or her subscription  agreement, he
          or she shall  elect to have  payroll  deductions  made on each pay day
          during the Offering Period in an amount not exceeding  fifteen percent
          (15%) of the  Compensation  which he or she  receives  on each pay day
          during  the  Offering  Period,  and  the  aggregate  of  such  payroll
          deductions during the Offering Period shall not exceed fifteen percent
          (15%) of the participant's Compensation during said Offering Period.

     (b)  All payroll deductions made for a participant shall be credited to his
          or  her  account  under  the  Plan  and  will  be  withheld  in  whole
          percentages  only. A participant may not make any additional  payments
          into such account.

     (c)  A participant may discontinue his or her  participation in the Plan as
          provided in Section 10 hereof, or may increase or decrease the rate of
          his or her payroll deductions during the Offering Period by completing
          or filing with the Company a new subscription  agreement authorizing a
          change in payroll  deduction  rate. The Board may, in its  discretion,
          limit the number of  participation  rate  changes  during any Offering
          Period.  The  change in rate  shall be  effective  with the first full
          payroll  period  following  five (5) business days after the Company's
          receipt of the new subscription agreement unless the Company elects to
          process a given change in participation  more quickly. A participant's
          subscription  agreement shall remain in effect for successive Offering
          Periods unless terminated as provided in Section 10 hereof.

     (d)  Notwithstanding the foregoing,  to the extent necessary to comply with
          Section 423(b)(8) of the Code and Section 3(b) hereof, a participant's
          payroll  deductions  may be  decreased  to 0% at such time  during any
          Purchase Period which is scheduled to end during the current  calendar
          year (the "Current Purchase Period") that the aggregate of all payroll
          deductions which were previously used to purchase stock under the Plan
          in a prior Purchase  Period which ended during that calendar year plus
          all  payroll  deductions  accumulated  with  respect  to  the  Current
          Purchase Period equal $21,250.  Payroll deductions shall recommence at
          the rate provided in such participant's  subscription agreement at the
          beginning  of the first  Purchase  Period which is scheduled to end in
          the following  calendar year,  unless terminated by the participant as
          provided in Section 10 hereof.

     (e)  At the time the option is  exercised,  in whole or in part,  or at the
          time some or all of the  Company's  Common Stock issued under the Plan
          is disposed of, the participant  must make adequate  provision for the
          Company's  federal,  state, or other tax withholding  obligations,  if
          any, which arise upon the exercise of the option or the disposition of
          the  Common  Stock.  At any time,  the  Company  may,  but will not be
          obligated to, withhold from the participant's  compensation the amount
          necessary for the Company to meet applicable withholding  obligations,
          including any  withholding  required to make  available to the Company
          any  tax  deductions  or  benefits   attributable  to  sale  or  early
          disposition of Common Stock by the Employee.

7.   Grant of Option.  On the  Enrollment  Date of each  Offering  Period,  each
     eligible Employee participating in such Offering Period shall be granted an
     option to purchase on each Exercise  Date during such  Offering  Period (at
     the  applicable  Purchase  Price) up to a number of shares of the Company's
     Common Stock  determined by dividing  such  Employee's  payroll  deductions
     accumulated  prior to such Exercise Date and retained in the  Participant's
     account as of the Exercise Date by the applicable Purchase Price;  provided
     that in no event  shall an Employee be  permitted  to purchase  during each
     Purchase Period more than a number of Shares determined by dividing $12,500
     by the Fair Market  Value of a share of the  Company's  Common Stock on the
     Enrollment  Date, and provided  further that such purchase shall be subject
     to the  limitations  set forth in Sections 3(b) and 12 hereof.  Exercise of
     the  option  shall  occur as  provided  in  Section  8 hereof,  unless  the
     participant has withdrawn  pursuant to Section 10 hereof,  and shall expire
     on the last day of the Offering Period.

8.   Exercise  of  Option.  Unless  a  participant  withdraws  from  the Plan as
     provided in Section 10 hereof, his or her option for the purchase of shares
     will be  exercised  automatically  on the  Exercise  Date,  and the maximum
     number  of full  shares  subject  to  option  shall be  purchased  for such
     participant at the applicable  Purchase Price with the accumulated  payroll
     deductions in his or her account.  No fractional  shares will be purchased;
     any payroll deductions accumulated in a participant's account which are not
     sufficient to purchase a full share shall be retained in the  participant's
     account for the subsequent  Purchase Period or Offering Period,  subject to
     earlier withdrawal by the participant as provided in Section 10 hereof. Any
     other monies left over in a  participant's  account after the Exercise Date
     shall be returned to the participant.  During a participant's  lifetime,  a
     participant's  option to purchase shares  hereunder is exercisable  only by
     him or her.

9.   Delivery.  As promptly as  practicable  after each Exercise Date on which a
     purchase of shares  occurs,  the Company shall arrange the delivery to each
     participant,  as  appropriate,  of a  certificate  representing  the shares
     purchased upon exercise of his or her option. 10.  Withdrawal;  Termination
     of Employment.


     (a)  A  participant  may  withdraw  all but not less  than all the  payroll
          deductions credited to his or her account and not yet used to exercise
          his or her option under the Plan at any time by giving  written notice
          to the  Company  in the form of  Exhibit  B to this  Plan.  All of the
          participant's  payroll deductions  credited to his or her account will
          be paid to such  participant  promptly  after  receipt  of  notice  of
          withdrawal and such participant's  option for the Offering Period will
          be automatically terminated, and no further payroll deductions for the
          purchase  of  shares  will be made  for  such  Offering  Period.  If a
          participant withdraws from an Offering Period, payroll deductions will
          not resume at the beginning of the succeeding  Offering  Period unless
          the participant delivers to the Company a new subscription agreement.

     (b)  Upon a participant's  ceasing to be an Employee (as defined in Section
          2(g) hereof), for any reason, he or she will be deemed to have elected
          to withdraw from the Plan and the payroll deductions  credited to such
          participant's  account during the Offering  Period but not yet used to
          exercise  the option will be returned to such  participant  or, in the
          case of his or her death,  to the person or persons  entitled  thereto
          under  Section  14  hereof,  and  such  participant's  option  will be
          automatically terminated.  The preceding sentence  notwithstanding,  a
          participant  who receives  payment in lieu of notice of termination of
          employment  shall be treated as  continuing  to be an Employee for the
          participant's  customary number of hours per week of employment during
          the period in which the participant is subject to such payment in lieu
          of notice.

11.  Interest.  No  interest  shall  accrue  on  the  payroll  deductions  of  a
     participant in the Plan.

12.  Stock.

     (a)  The maximum number of shares of the Company's Common Stock which shall
          be made  available  for sale under the Plan shall be five  hundred and
          twenty five thousand (525,000),  subject to adjustment upon changes in
          capitalization of the Company as provided in Section 18 hereof. If, on
          a given  Exercise  Date,  the number of shares  with  respect to which
          options  are  to be  exercised  exceeds  the  number  of  shares  then
          available under the Plan, the Company shall make a pro rata allocation
          of the shares remaining  available for purchase in as uniform a manner
          as shall be practicable and as it shall determine to be equitable.

     (b)  The  participant  will  have no  interest  or  voting  right in shares
          covered by his option until such option has been exercised. (c) Shares
          to be delivered to a participant  under the Plan will be registered in
          the name of the  participant or in the name of the participant and his
          or her spouse.


13.  Administration.

     (a)  Administrative  Body. The Plan shall be administered by the Board or a
          committee of members of the Board appointed by the Board. The Board or
          its committee shall have full and exclusive discretionary authority to
          construe,  interpret  and apply the  terms of the Plan,  to  determine
          eligibility  and to  adjudicate  all  disputed  claims filed under the
          Plan. Every finding,  decision and determination  made by the Board or
          its committee shall, to the full extent permitted by law, be final and
          binding upon all parties.

     (b)  Rule 16b-3 Limitations.  Notwithstanding  the provisions of Subsection
          (a) of this Section 13, in the event that Rule 16b-3 promulgated under
          the Securities  Exchange Act of 1934, as amended (the "Exchange Act"),
          or  any  successor   provision   ("Rule  16b-3")   provides   specific
          requirements  for the  administrators  of plans of this type, the Plan
          shall be only  administered  by such a body  and in such a  manner  as
          shall comply with the applicable  requirements  of Rule 16b-3.  Unless
          permitted by Rule 16b-3, no discretion  concerning decisions regarding
          the Plan shall be  afforded  to any  committee  or person  that is not
          "disinterested" as that term is used in Rule 16b-3.

14.  Designation of Beneficiary.

     (a)  A participant  may file a written  designation of a beneficiary who is
          to receive any shares and cash, if any, from the participant's account
          under the Plan in the event of such participant's  death subsequent to
          an  Exercise  Date on which  the  option  is  exercised  but  prior to
          delivery to such  participant of such shares and cash. In addition,  a
          participant may file a written  designation of a beneficiary who is to
          receive any cash from the participant's  account under the Plan in the
          event of such participant's  death prior to exercise of the option. If
          a participant  is married and the  designated  beneficiary  is not the
          spouse,  spousal consent shall be required for such  designation to be
          effective.

     (b)  Such  designation of beneficiary  may be changed by the participant at
          any time by written notice. In the event of the death of a participant
          and in the absence of a beneficiary  validly designated under the Plan
          who is living at the time of such  participant's  death,  the  Company
          shall deliver such shares and/or cash to the executor or administrator
          of  the  estate  of  the  participant,  or  if  no  such  executor  or
          administrator  has been  appointed  (to the knowledge of the Company),
          the Company, in its discretion, may deliver such shares and/or cash to
          the  spouse  or to any  one or more  dependents  or  relatives  of the
          participant,  or if no spouse,  dependent  or relative is known to the
          Company, then to such other person as the Company may designate.

15.  Transferability.  Neither  payroll  deductions  credited to a participant's
     account  nor any  rights  with  regard to the  exercise  of an option or to
     receive  shares  under the Plan may be  assigned,  transferred,  pledged or
     otherwise  disposed of in any way (other than by will,  the laws of descent
     and  distribution or as provided in Section 14 hereof) by the  participant.
     Any such attempt at assignment, transfer, pledge or other disposition shall
     be  without  effect,  except  that the  Company  may  treat  such act as an
     election  to  withdraw  funds from an Offering  Period in  accordance  with
     Section 10 hereof.

16.  Use of Funds. All payroll deductions  received or held by the Company under
     the Plan may be used by the  Company  for any  corporate  purpose,  and the
     Company shall not be obligated to segregate such payroll deductions.

17.  Reports. Individual accounts will be maintained for each participant in the
     Plan.  Statements  of account will be given to  participating  Employees at
     least  annually,  which  statements  will set forth the  amounts of payroll
     deductions,  the Purchase  Price,  the number of shares  purchased  and the
     remaining cash balance, if any.

18.  Adjustments  Upon  Changes  in  Capitalization,  Dissolution,  Liquidation,
     Merger or Asset Sale.

     a)   Changes  in  Capitalization.  Subject  to any  required  action by the
          stockholders  of the  Company,  the  Reserves as well as the price per
          share of Common Stock  covered by each option under the Plan which has
          not yet been  exercised  shall  be  proportionately  adjusted  for any
          increase or decrease  in the number of issued  shares of Common  Stock
          resulting  from a stock split,  reverse stock split,  stock  dividend,
          combination  or  reclassification  of the Common  Stock,  or any other
          increase or decrease in the number of shares of Common Stock  effected
          without receipt of  consideration by the Company;  provided,  however,
          that conversion of any convertible securities of the Company shall not
          be deemed to have been "effected  without  receipt of  consideration".
          Such adjustment  shall be made by the Board,  whose  determination  in
          that  respect  shall be  final,  binding  and  conclusive.  Except  as
          expressly  provided  herein,  no  issuance by the Company of shares of
          stock of any class, or securities  convertible into shares of stock of
          any class,  shall affect, and no adjustment by reason thereof shall be
          made with  respect  to, the number or price of shares of Common  Stock
          subject to an option.

     (b)  Dissolution or Liquidation.  In the event of the proposed  dissolution
          or  liquidation  of the Company,  the Offering  Periods will terminate
          immediately prior to the consummation of such proposed action,  unless
          otherwise provided by the Board.

     (c)  Merger  or  Asset  Sale.  In the  event of a  proposed  sale of all or
          substantially  all of the assets of the Company,  or the merger of the
          Company with or into another  corporation,  each option under the Plan
          shall be assumed or an equivalent  option shall be substituted by such
          successor  corporation  or a parent or  subsidiary  of such  successor
          corporation,  unless the Board determines, in the exercise of its sole
          discretion and in lieu of such assumption or substitution,  to shorten
          the Offering  Periods then in progress by setting a new Exercise  Date
          (the "New Exercise Date").  If the Board shortens the Offering Periods
          then in progress in lieu of assumption or substitution in the event of
          a merger or sale of assets, the Board shall notify each participant in
          writing,  at least ten (10)  business  days prior to the New  Exercise
          Date,  that the  Exercise  Date for his option has been changed to the
          New Exercise Date and that his option will be exercised  automatically
          on the New Exercise  Date,  unless prior to such date he has withdrawn
          from the  Offering  Period as  provided  in  Section  10  hereof.  For
          purposes of this paragraph,  an option granted under the Plan shall be
          deemed to be assumed if,  following the sale of assets or merger,  the
          option  confers the right to purchase,  for each share of option stock
          subject  to the  option  immediately  prior to the sale of  assets  or
          merger, the consideration  (whether stock, cash or other securities or
          property)  received  in the sale of assets or  merger  by  holders  of
          Common Stock for each share of Common Stock held on the effective date
          of the  transaction  (and if such  holders  were  offered  a choice of
          consideration,  the type of  consideration  chosen by the holders of a
          majority  of  the  outstanding  shares  of  Common  Stock);  provided,
          however, that if such consideration  received in the sale of assets or
          merger was not solely common stock of the successor corporation or its
          parent (as defined in Section 424(e) of the Code), the Board may, with
          the   consent  of  the   successor   corporation,   provide   for  the
          consideration  to be received upon exercise of the option to be solely
          common stock of the successor  corporation or its parent equal in fair
          market  value to the per share  consideration  received  by holders of
          Common Stock and the sale of assets or merger.

19.  Amendment or Termination.

     (a)  The  Board of  Directors  of the  Company  may at any time and for any
          reason  terminate or amend the Plan.  Except as provided in Section 18
          hereof,  no such  termination can affect options  previously  granted,
          provided  that an Offering  Period may be  terminated  by the Board of
          Directors  on any  Exercise  Date if the  Board  determines  that  the
          termination  of the Plan is in the best  interests  of the Company and
          its  stockholders.  Except  as  provided  in  Section  18  hereof,  no
          amendment may make any change in any option theretofore  granted which
          adversely  affects  the  rights  of any  participant.  To  the  extent
          necessary  to comply with Rule 16b-3 or under  Section 423 of the Code
          (or any  successor  rule or provision or any other  applicable  law or
          regulation),  the Company shall obtain stockholder  approval in such a
          manner and to such a degree as required.

     (b)  Without   stockholder  consent  and  without  regard  to  whether  any
          participant   rights  may  be  considered  to  have  been   "adversely
          affected,"  the Board (or its  committee)  shall be entitled to change
          the Offering Periods,  limit the frequency and/or number of changes in
          the amount withheld during an Offering Period,  establish the exchange
          ratio  applicable  to amounts  withheld in a currency  other than U.S.
          dollars, permit payroll withholding in excess of the amount designated
          by a  participant  in order to adjust  for delays or  mistakes  in the
          Company's  processing  of properly  completed  withholding  elections,
          establish  reasonable waiting and adjustment periods and/or accounting
          and  crediting  procedures to ensure that amounts  applied  toward the
          purchase of Common Stock for each participant properly correspond with
          amounts withheld from the  participant's  Compensation,  and establish
          such other  limitations  or procedures as the Board (or its committee)
          determines in its sole discretion  advisable which are consistent with
          the Plan.

20.  Notices.  All  notices  or other  communications  by a  participant  to the
     Company under or in  connection  with the Plan shall be deemed to have been
     duly  given  when  received  in the form  specified  by the  Company at the
     location,  or by the  person,  designated  by the  Company  for the receipt
     thereof.

21.  Conditions Upon Issuance of Shares. Shares shall not be issued with respect
     to an option  unless  the  exercise  of such  option and the  issuance  and
     delivery of such shares  pursuant  thereto shall comply with all applicable
     provisions of law, domestic or foreign, including,  without limitation, the
     Securities Act of 1933, as amended, the Securities Exchange Act of 1934, as
     amended,  the  rules  and  regulations  promulgated  thereunder,   and  the
     requirements  of any  stock  exchange  upon  which the  shares  may then be
     listed,  and shall be further  subject to the  approval  of counsel for the
     Company with respect to such compliance.

     As a condition  to the exercise of an option,  the  Company may require the
     person  exercising  such option to represent and warrant at the time of any
     such exercise that the shares are being  purchased  only for investment and
     without any present  intention to sell or distribute such shares if, in the
     opinion of counsel for the Company,  such a  representation  is required by
     any of the aforementioned applicable provisions of law.

22.  Term of Plan. The Plan shall become  effective upon the earlier to occur of
     its adoption by the Board of Directors or its approval by the  stockholders
     of the  Company.  It shall  continue in effect for a term of ten (10) years
     unless sooner terminated under Section 19 hereof.

23.  Automatic Transfer to Low Price Offering Period. To the extent permitted by
     Rule 16b-3 of the  Exchange  Act,  if the Fair  Market  Value of the Common
     Stock on any  Exercise  Date in an  Offering  Period is lower than the Fair
     Market Value of the Common Stock on the  Enrollment  Date of such  Offering
     Period,   then  all   participants   in  such  Offering   Period  shall  be
     automatically  withdrawn from such Offering  Period  immediately  after the
     exercise  of  their  option  on  such  Exercise   Date  and   automatically
     re-enrolled in the  immediately  following  Offering Period as of the first
     day thereof.

24.  Stockholder Approval.  Continuance of the Plan shall be subject to approval
     by the  stockholders  of the Company  within  twelve (12) months  before or
     after the date the Plan is  adopted.  Such  stockholder  approval  shall be
     obtained  in the degree  and manner  required  under  applicable  state and
     federal law.  25.  Financial  Reports.  The Company  shall  provide to each
     Optionee, not less frequently than annually during the period such Optionee
     has one or more Options outstanding, copies of annual financial statements.
     The  Company  shall not be  required  to  provide  such  statements  to key
     employees  whose duties in connection  with the Company assure their access
     to equivalent information.


EXHIBIT A NEUROCRINE BIOSCIENCES, INC. 1996 EMPLOYEE STOCK PURCHASE PLAN SUBSCRIPTION AGREEMENT _____ Original Application Enrollment Date: ___________ _____ Change in Payroll Deduction Rate _____ Change of Beneficiary(ies) 1. ___________________ hereby elects to participate in the Neurocrine Biosciences, Inc. 1996 Employee Stock Purchase Plan (the "Employee Stock Purchase Plan") and subscribes to purchase shares of the Company's Common Stock in accordance with this Subscription Agreement and the Employee Stock Purchase Plan. 2. I hereby authorize payroll deductions from each paycheck in the amount of ____% of my Compensation on each payday (1-15%) during the Offering Period in accordance with the Employee Stock Purchase Plan. (Please note that no fractional percentages are permitted.) 3. I understand that said payroll deductions shall be accumulated for the purchase of shares of Common Stock at the applicable Purchase Price determined in accordance with the Employee Stock Purchase Plan. I understand that if I do not withdraw from an Offering Period, any accumulated payroll deductions will be used to automatically exercise my option. 4. I have received a copy of the complete "Neurocrine Biosciences, Inc. 1996 Employee Stock Purchase Plan." I understand that my participation in the Employee Stock Purchase Plan is in all respects subject to the terms of the Plan. I understand that my ability to exercise the option under this Subscription Agreement is subject to obtaining stockholder approval of the Employee Stock Purchase Plan. 5. Shares purchased for me under the Employee Stock Purchase Plan should be issued in the name(s) of (Employee or Employee and spouse only): ______________________________. 6. I understand that if I dispose of any shares received by me pursuant to the Plan within 2 years after the Enrollment Date (the first day of the Offering Period during which I purchased such shares) or one year after the Exercise Date, I will be treated for federal income tax purposes as having received ordinary income at the time of such disposition in an amount equal to the excess of the fair market value of the shares at the time such shares were purchased over the price which I paid for the shares. I HEREBY AGREE TO NOTIFY THE COMPANY IN WRITING WITHIN 30 DAYS AFTER THE DATE OF ANY DISPOSITION OF MY SHARES AND I WILL MAKE ADEQUATE PROVISION FOR FEDERAL, STATE OR OTHER TAX WITHHOLDING OBLIGATIONS, IF ANY, WHICH ARISE UPON THE DISPOSITION OF THE COMMON STOCK. The Company may, but will not be obligated to, withhold from my compensation the amount necessary to meet any applicable withholding obligation including any withholding necessary to make available to the Company any tax deductions or benefits attributable to sale or early disposition of Common Stock by me. If I dispose of such shares at any time after the expiration of the 2-year and 1-year holding periods, I understand that I will be treated for federal income tax purposes as having received income only at the time of such disposition, and that such income will be taxed as ordinary income only to the extent of an amount equal to the lesser of (1) the excess of the fair market value of the shares at the time of such disposition over the purchase price which I paid for the shares, or (2) 15% of the fair market value of the shares on the first day of the Offering Period. The remainder of the gain, if any, recognized on such disposition will be taxed as capital gain. 7. I hereby agree to be bound by the terms of the Employee Stock Purchase Plan. The effectiveness of this Subscription Agreement is dependent upon my eligibility to participate in the Employee Stock Purchase Plan. 8. In the event of my death, I hereby designate the following as my beneficiary(ies) to receive all payments and shares due me under the Employee Stock Purchase Plan: NAME: (Please print) ---------------------------------------------- (First) (Middle) (Last) ---------------------------------------------- Relationship ---------------------------------------------- ---------------------------------------------- (Address) Employee's Social ---------------------------------------------- Security Number: ---------------------------------------------- Employee's Address: ---------------------------------------------- ---------------------------------------------- I UNDERSTAND THAT THIS SUBSCRIPTION AGREEMENT SHALL REMAIN IN EFFECT THROUGHOUT SUCCESSIVE OFFERING PERIODS UNLESS TERMINATED BY ME. Dated: ------------------ ---------------------------------------------- Signature of Employee ---------------------------------------------- Spouse's Signature (If beneficiary other than spouse)

EXHIBIT B NEUROCRINE BIOSCIENCES, INC. 1996 EMPLOYEE STOCK PURCHASE PLAN NOTICE OF WITHDRAWAL The undersigned participant in the Offering Period of the Neurocrine Biosciences, Inc. 1996 Employee Stock Purchase Plan which began on ____________, 19____ (the "Enrollment Date") hereby notifies the Company that he or she hereby withdraws from the Offering Period. He or she hereby directs the Company to pay to the undersigned as promptly as practicable all the payroll deductions credited to his or her account with respect to such Offering Period. The undersigned understands and agrees that his or her option for such Offering Period will be automatically terminated. The undersigned understands further that no further payroll deductions will be made for the purchase of shares in the current Offering Period and the undersigned shall be eligible to participate in succeeding Offering Periods only by delivering to the Company a new Subscription Agreement. Name and Address of Participant: ----------------------------------------------- ----------------------------------------------- ----------------------------------------------- ----------------------------------------------- Signature ------------------------------------------------ Date



                                                                     Exhibit 5.1

                                LATHAM & WATKINS

                        12626 HIGH BLUFF DRIVE, SUITE 300

                           SAN DIEGO, CALIFORNIA 92130

                                 (858) 523-5400

July 16, 2001

Neurocrine Biosciences, Inc.
10555 Science Center Drive
San Diego, California 92121

Re:      Form S-8 Registration Statement

Ladies and Gentlemen:

     In connection  with the  registration  by Neurocrine  Biosciences,  Inc., a
Delaware  corporation  (the  "Company"),  and aggregate of of 850,000  shares of
common stock,  par value $0.001 per share (the  "Shares"),  of the Company to be
issued pursuant to the Neurocrine  Biosciences,  Inc. 1992 Incentive Stock Plan,
as amended,  and the Neurocrine  Biosciences,  Inc. 1996 Employee Stock Purchase
Plan, as amended  (collectively the "Plans"),  under the Securities Act of 1933,
as amended (the "Act"),  on a Registration  Statement on Form S-8 filed with the
Securities  and  Exchange  Commission  on July 16, 2001 (as amended from time to
time, the "Registration Statement"), you have requested our opinion with respect
to the matters set forth below.

     In our capacity as your counsel in connection  with such  registration,  we
are familiar with the proceedings  taken and proposed to be taken by the Company
in connection with the  authorization,  issuance and sale of the Shares, and for
the  purposes of this  opinion,  have assumed  such  proceedings  will be timely
completed in the manner presently proposed. In addition, we have made such legal
and factual examinations and inquiries, including an examination of originals or
copies certified or otherwise  identified to our satisfaction of such documents,
corporate  records and  instruments,  as we have deemed necessary or appropriate
for purposes of this opinion.

     In our examination,  we have assumed the genuineness of all signatures, the
authenticity of all documents  submitted to us as originals,  and the conformity
to authentic original documents of all documents submitted to us as copies.

     We are opining herein as to the effect on the subject  transaction  only of
the General Corporation Law of the State of Delaware,  and we express no opinion
with respect to the applicability  thereto,  or the effect thereon, of any other
laws,  or as to any  matters  of  municipal  law or the laws of any other  local
agencies within the state.

     Subject to the foregoing, it is our opinion that as of the date hereof, the
Shares have been duly authorized,  and, upon the issuance of and payment for the
Shares in accordance  with the terms set forth in the Plans,  the Shares will be
validly issued, fully paid and nonassessable.

     We consent to your  filing this  opinion as an exhibit to the  Registration
Statement.

                                          Very truly yours,

                                          /s/ LATHAM & WATKINS




                                                                    Exhibit 23.1

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

     We consent to the incorporation by reference in this Registration Statement
on Form S-8 pertaining to the Neurocrine Biosciences,  Inc. 1992 Incentive Stock
Plan, as amended,  and the  Neurocrine  Biosciences,  Inc.  1996 Employee  Stock
Purchase Plan, as amended, of our report dated January 29, 2001, with respect to
the financial statements of Neurocrine Biosciences,  Inc. included in its Annual
Report Form 10-K for the year ended December 31, 2000, filed with the Securities
and Exchange Commission.



                                               /s/ERNST & YOUNG LLP

San Diego, California
July 13, 2001