As filed with the Securities and Exchange Commission on March 15, 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. 2001 STOCK OPTION PLAN
                            (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   Per Share(1)     Price(1)          Fee
- --------------------- ------------ -------------- ---------------- ------------
Common Stock
   $0.001 par value..   750,000      $ 15.3125      $ 11,484,375    $  2,872
===================== ============ ============== ================ ============

(1)    Estimated  solely for purposes of computing the  registration fee for the
       750,000 shares registered herewith. Pursuant to Rule 457(c), the proposed
       Maximum  Offering  Price Per  Share is based on the high and low  trading
       prices of the Company's  Common Stock as reported on the Nasdaq  National
       Market System on March 14, 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, 1999, filed March 30, 2000, as amended November 30, 2000; (b) The Company's Quarterly Reports on Forms 10-Q for the three months ended March 31, 2000, filed May 15, 2000, for the three months ended June 30, 2000, filed August 11, 2000, and for the three months ended September 30, 2000, filed November 8, 2000; (c) All other reports filed by the Company with the SEC since December 31, 1999 pursuant to Sections 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"); (d) The Current Reports filed pursuant to Sections 13(a) or 15(d) of the Exchange Act on Forms 8-K dated April 6, 2000, December 14, 2000 and December 15, 2000; (e) The Company's definitive proxy statement dated April 27, 2000 filed in connection with its May 24, 2000 Annual Meeting of Stockholders; and (f) 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 Form of Common Stock Certificate (1) 4.2 Neurocrine Biosciences, Inc. 2001 Stock Option Plan 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 (see page II-5) ------------ (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 Ac 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.

(a) 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. (b) 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 15th day of March 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 March 15, 2001 - ---------------------------- Officer and Director Gary A. Lyons (Principal Executive Officer) /s/ Paul W. Hawran Chief Financial Officer March 15, 2001 - ---------------------------- (Principal Financing Paul W. Hawran and Accounting Officer) /s/ Joseph A. Mollica Chairman of the March 15, 2001 - ---------------------------- Board of Directors Joseph A. Mollica /s/ Richard F. Pops Director March 15, 2001 - ---------------------------- Richard F. Pops /s/ Stephen A. Sherwin Director March 15, 2001 - ---------------------------- Stephen A. Sherwin /s/ Lawrence J. Steinman Director March 15, 2001 - ---------------------------- Lawrence J. Steinman /s/ Wylie W. Vale Director March 15, 2001 - ---------------------------- Wylie W. Vale

INDEX TO EXHIBITS Exhibit Number Document - ------- --------------------------------------------------------------------- 4.1 Form of Common Stock Certificate (1) 4.2 Neurocrine Biosciences, Inc. 2001 Stock Option Plan 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 (see page II-5) ------------ (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.
                             2001 STOCK OPTION PLAN

1.   Purpose of the Plan.  The purposes of this Stock Option 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.

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.

     (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
          ninety (90) days or reemployment  upon the expiration of such leave is
          guaranteed by contract or statute.

          (i)  "Employee"  shall  mean  any  employee  who  is  not  a  "covered
               employee"  within the meaning of Section  162(m) of the Code, who
               is not subject to Section 16 of the Act and who is  designated by
               the Committee as eligible to participate in the Plan.

     (h)  "Nonstatutory  Stock  Option"  shall  mean an Option not  intended  to
          qualify as an incentive stock option within the meaning of section 422
          of the Code.

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

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

(k) "Optionee" shall mean an Employee or Consultant who receives an Option. (l) "Parent" shall mean a "parent corporation," whether now or hereafter existing, as defined in Section 424(e) of the Code. (m) "Plan" shall mean this 2001 Stock Option Plan. (n) "Purchaser" shall mean an Employee or Consultant who exercises a Stock Purchase Right. (o) "Share" shall mean a share of the Common Stock, as adjusted in accordance with Section 9 of the Plan. (p) "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. (q) "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 9 of the Plan, the maximum aggregate number of shares under the Plan is seven hundred and fifty thousand (750,000) 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) 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 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. 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 a Nonstatutory Stock Option.

(c) 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. 6. Term of Plan. The Plan shall become effective upon its adoption by the Board of Directors. 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. The per Share exercise price shall be no less than eighty-five percent (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 one hundred percent (100%) of the Fair Market Value per Share on the date of grant. (b) Notwithstanding the foregoing, Options may be granted with a per Share exercise price of less than one hundred percent (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, 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. (i) 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. (ii) 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 may consist entirely of cash, check, promissory note, other Shares of Common Stock which (A) 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 (B) 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. (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 twenty percent (20%) per year over five (5) years from the date the Option is granted. (ii) An Option may not be exercised for a fraction of a Share. (iii)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. 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. (iv) 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. (v) 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 ninety (90) days after the date of termination, 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. (vi) Disability of Optionee. Notwithstanding the provisions of Section 8(b)(v) 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) 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 the right to exercise would have accrued had the Optionee continued Continuous Status as an Employee or Consultant for a period of six (6) months following termination of Continuous Status by reason of disability. To the extent that such Employee or Consultant was not entitled to exercise an Option in this period, 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. (vii) 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 (or at such later time as may be determined by the Board 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) 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) 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 that the right to exercise that had accrued at the date of termination.

(c) Stock Purchase Rights. (i) 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. (ii) 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. (iii)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. 9. 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. (a) 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. (b) Adjustments upon Changes in Capitalization or Merger. (i) 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. (c) 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. (d) 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 fifty percent (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: (i) 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; (ii) employee willfully and habitually neglects the duties of employment; or (iii)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. (e) 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. (f) Amendment and Termination of the Plan. (i) 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 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. (ii) 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.

A. 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. B. 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. C. 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. D. 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 5.1
                                Latham & Watkins
                        12626 High Bluff Drive, Suite 300
                           San Diego, California 92130
                                 (858) 523-5400

March 15, 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"), of 750,000 shares of common stock,
par value $0.001 per share (the "Shares"),  of the Company to be issued pursuant
to the  Neurocrine  Biosciences,  Inc. 2001 Stock Option Plan (the "Plan") 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 March 15, 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 Plan,  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 (Form S-8) pertaining to the 2001 Stock Option Plan of Neurocrine Biosciences, Inc. of our report dated January 27, 2000, with respect to the consolidated financial statements of Neurocrine Biosciences, Inc. included in its Annual Report (Form 10-K) for the year ended December 31, 1999, filed with the Securities and Exchange Commission. ERNST & YOUNG LLP San Diego, California March 15, 2001