NEUROCRINE BIOSCIENCES INC
S-3, 2000-01-20
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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    As filed with the Securities and Exchange Commission on January 19, 2000
                              Registration No. 333-

================================================================================

                       SECURITIES AND EXCHANGE COMMISSION

                                    FORM S-3
             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
                                 (858) 658-7600
    (Address, including zip code, and telephone number, including area code,
                  of registrant's principal executive offices)

                                  Gary A. Lyons
                 President, Chief Executive Officer and Director
                          Neurocrine Biosciences, Inc.
                           10555 Science Center Drive
                           San Diego, California 92121
                                 (858) 658-7600

 (Name, address, including zip code, and telephone number, including area code,
                               of agent for service)

                                   Copies to:
                                 John M. Newell
                                Latham & Watkins
                        633 West Fifth Street, Suite 4000
                          Los Angeles, California 90071
                                 (213) 485-1234

     Approximate date of commencement of proposed sale to the public:  From time
to time after the effective date of this Registration Statement.

     If the only  securities  being  registered  on this Form are to be  offered
pursuant to dividend or interest  reinvestment plans, please check the following
box.
     If any of the securities being registered on this Form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, as amended (the "Securities  Act"),  other than securities offered only in
connection  with dividend or interest  reinvestment  plans,  check the following
box.
     If this Form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering.

     If this Form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration  statement number of the earlier effective  registration  statement
for the same offering.
     If delivery of the  prospectus is expected to be made pursuant to Rule 434,
please check the following box.
<TABLE>
<CAPTION>

                         CALCULATION OF REGISTRATION FEE
======================================================================================================================
                                                           Proposed Maximum    Proposed Maximum
         Title of Each Class of            Amount to be   Offering Price Per  Aggregate Offering       Amount of
      Securities to be Registered           Registered         Share (1)           Price (1)        Registration Fee
- ----------------------------------------- --------------- ----------------- --------------------- -------------------
<S>                                          <C>                <C>              <C>                    <C>
Common Stock, par value $0.001 per share     2,327,777          $28.50           $66,341,645            $18,443
========================================= =============== ================= ====================== ==================
<FN>
(1)  Estimated solely for the purpose of computing the registration fee required
     by Section 6(b) of the Securities Act and computed  pursuant to Rule 457(c)
     under the  Securities Act based upon the average of the high and low prices
     of the Common Stock on January 14, 2000, as reported on the Nasdaq National
     Market.
</FN>
</TABLE>

   The  Registrant  hereby  amends this  Registration  Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further  amendment  which  specifically  states  that  this  Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the Securities Act or until the Registration Statement shall become effective on
such date as the Securities  and Exchange  Commission,  acting  pursuant to said
Section 8(a), may determine.



<PAGE>


           The information  contained in this prospectus is not complete and may
be changed. These securities may not be sold until the registration statement
filed with the Securities and Exchange Commission is effective.  This prospectus
is not an offer to sell nor does it seek an offer to buy these securities in any
jurisdiction where the offer or sale is not permitted.

PROSPECTUS
(Subject to completion, dated January 19, 2000)


                          NEUROCRINE BIOSCIENCES, INC.

                        2,327,777 Shares of Common Stock

The selling shareholders  identified in this prospectus may sell up to 2,327,777
shares of common stock of Neurocrine Biosciences,  Inc., a Delaware corporation.
The selling  shareholders  may offer and sell their  shares of common stock from
time to time: on terms to be  determined at the time of a sale; in  transactions
on the Nasdaq National Market;  in privately  negotiated  transactions;  or in a
combination of these methods of sale.

Neurocrine's  Common  Stock is listed on the Nasdaq  National  Market  under the
symbol  "NBIX." On January 14, 2000 the average of the high and low price of the
Common Stock was $28.50 per share.

The shares offered in this Prospectus  involve a high degree of risk. You should
carefully  consider  certain "Risk  Factors" in  determining  whether to buy any
Neurocrine Common Stock. See page 7.

NEITHER  THE  SECURITIES  AND  EXCHANGE  COMMISSION  NOR  ANY  STATE  SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED THESE  SECURITIES,  OR DETERMINED IF THIS
PROSPECTUS  IS TRUTHFUL OR  COMPLETE.  ANY  REPRESENTATION  TO THE CONTRARY IS A
CRIMINAL OFFENSE.



                                  The date of this Prospectus is January__, 2000


                                      -1-

<PAGE>


                                TABLE OF CONTENTS
                                                                           Page
Summary ...............................................................       3
Risk Factors ..........................................................       7
Business ..............................................................      15
Use of Proceeds .......................................................      15
Selling Stockholders ..................................................      15
Plan of Distribution ..................................................      16
Legal Matters .........................................................      17
Experts................................................................      17
Where You Can Find More Information ...................................      17
Information Incorporated by Reference .................................      18




                                      -2-
<PAGE>

                                     SUMMARY

         Neurocrine is a leading  neuroscience  company focused on the discovery
and development of novel  therapeutics for  neuropsychiatric,  neuroinflammatory
and neurodegenerative  diseases and disorders.  Our neuroscience,  endocrine and
immunology  disciplines  provide  us a unique  biological  understanding  of the
molecular interaction between central nervous,  immune and endocrine systems for
the development of therapeutic interventions for anxiety/ depression,  insomnia,
glioblastoma, diabetes, multiple sclerosis, endometriosis,  Alzheimer's disease,
Stroke and Obesity.

Strategic Alliances

         We  leverage  our  resources  through  strategic  alliances  and  other
financing mechanisms to build internal product development and commercialization
capabilities. We currently have three strategic alliances:

     o    Janssen  Pharmaceutica,  N.V.  ("Janssen"),  a subsidiary of Johnson &
          Johnson Development  Corporation,  focused on corticotropin  releasing
          factor receptor  antagonists for the treatment of anxiety,  depression
          and substance abuse.

     o    American  Home  Products  acting  through  Wyeth-Ayerst   Laboratories
          Division  ("Wyeth-Ayerst")  focused on modulation of excitatory  amino
          acid  transporters   ("EAATs")  for  neurodegenerative   diseases  and
          psychiatric  disorders.

     o    Eli Lilly and Co. ("Lilly") focused on corticotropin  releasing factor
          binding protein  antagonists and agonists of  corticotropin  releasing
          factor  receptor  2  for  the  treatment  of  central  nervous  system
          disorders including obesity and dementias such as Alzheimer's Disease.

 Clinical Development

     The  following   table   summarizes   Neurocrine's   products  in  clinical
development.

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

Program                       Indication          Status      Commercial Rights
- --------------------------------------------------------------------------------
CRF Receptor Antagonist       Anxiety/Depression  Phase II    Janssen/Neurocrine
GABA Receptor Subtype Agonist Insomnia            Phase II    Neurocrine
IL-4 Fusion Toxin             Glioblastoma        Phase I/II  Neurocrine
Altered Peptide Ligand        Multiple Sclerosis  Phase II    Neurocrine
Altered Peptide Ligand        Type I Diabetes     Phase I     Neurocrine
- --------------------------------------------------------------------------------


        "Phase I" indicates  that  Neurocrine  or its  collaborative  partner is
    conducting clinical trials to determine safety, the maximally tolerated dose
    and pharmacokinetics of the compound in human volunteers.

        "Phase II" indicates that the Company or its  collaborative  partner are
    conducting  clinical  trials to evaluate  one of the  Company's  products in
    humans to determine safety and efficacy in an expanded patient population.

                  Corticotropin   releasing   factor   ("CRF")  is  the  central
regulator of the body's overall  response to stress.  Neurocrine is developing a
new class of therapeutics  that target  stress-induced  anxiety by acting as CRF
receptor antagonists.  Our CRF receptor antagonist project is currently in Phase
II  clinical   development  with  our  partner,   Janssen   Pharmaceutica,   for
anxiety/depression.

                  According  to a  Gallup  Survey  conducted  on  behalf  of the
National Sleep Foundation,  49% of all Americans say they have trouble sleeping.
In the recent past the majority of patients  treated for insomnia  have utilized
non-benzodiazepine  compounds which,  while preferable in side effect profile to
the  benzodiazepine  class  compounds,  still exhibit certain  unfavorable  side
effects. We have completed a Phase II clinical trial in insomnia with NBI-34060,
a GABA receptor subtype agonist, NBI-34060. A preliminary analysis of the safety
data indicates that NBI-34060 is well tolerated, and has an incidence of adverse
effects similar to placebo group.  Statistical  significance was reached for the
primary clinical endpoint (Latency to Persistent  Sleep). We are completing data
analysis and we have planned additional Phase II studies.


                                      -3-

<PAGE>
                  Multiple  sclerosis  is  a  chronic  immune  mediated  disease
characterized  by recurrent  attacks of neurologic  dysfunction due to damage to
the central nervous system. With our partner,  Novartis Pharma A.G.  ("Novartis"
as successor in rights of  Ciba-Geigy,  Limited),  we complete a second Phase II
clinical trial with  NBI-5788/MSP771,  our Altered Peptide Ligand (APL) compound
in patients with multiple  sclerosis.  On July 7, 1999,  Novartis  exercised its
right to terminate our collaboration  effective January 7, 2000. As a result, we
reacquired   the   worldwide   rights  to  our  multiple   sclerosis   compound,
NBI-5788/MSP771.  On July 20, 1999, the Data and Safety Monitoring Board for our
NBI-5788/MSP771  Phase II trials recommended that the administration of the drug
be  stopped  due  to  a  number  of  patients  reporting   hypersensitivity-type
reactions. As defined in the protocol, all patients treated with NBI-5788/MSP771
will be followed to establish a complete safety and efficacy database. We expect
that the  analysis  of the results of the trial will be  completed  in the first
quarter of 2000.

                  Immunotoxins  are a novel form of cancer therapy which combine
a moiety which  targets a cancer cell and a toxin which,  when  delivered to the
cancer  cell,  will lead to cell death.  NBI-3001  is an IL-4 fusion  toxin that
combines an IL-4  moiety  which  targets  IL-4  receptors  highly  expressed  in
malignant  brain tumors with a Pseudomonas  exotoxin.  We are conducting a Phase
I/II trial with for NBI-3001, for glioblastoma  (malignant brain tumors). In the
pre-clinical  setting,  NBI-3001 has been found to be highly  cytotoxic to brain
tumor cell lines and  exhibits  anti-tumor  activity  in in vivo models of brain
cancer.

                  Type  I  Diabetes  is  one  of  the  most  prevalent   chronic
conditions in North America.  We believe that our  proprietary  altered  peptide
ligand  specific for  autoimmune T cells  involved in diabetes may stop or delay
the  destruction of insulin  secreting  cells.  We recently  commenced a Phase I
safety and dose  escalating  clinical study with NBI-6024,  our APL compound for
Type I Diabetic patients.


Research

The following table summarizes our most advanced research programs:
- --------------------------------------------------------------------------------
Program                       Indication             Status        Commercial
                                                                     Rights
- --------------------------------------------------------------------------------
CRF Receptor Antagonist       Anxiety/Depression;
                              Stroke                 Development   Neurocrine
Gonadotropin Releasing
  Hormone Factor              Endometriosis          Development   Neurocrine

Excitatory Amino              Neurodegenerative/
  Acid Transporters           Psychiatric disorder   Research      Wyeth-Ayerst/
                                                                   Neurocrine
Melanocortin Receptor Agonist Obesity                Research      Neurocrine

Orexin Antagonist/ Agonist    Sleep Disorders        Research      Neurocrine

Chemokine Antagonist          Inflammatory Disorders Research      Neurocrine
- --------------------------------------------------------------------------------

    "Research" indicates identification and evaluation of compounds in in vitro
     and animal models.

    "Development"  indicates that lead compounds have been discovered that meets
    certain  in  vitro  and  in  vivo  criteria.  These  compounds  may  undergo
    structural modification and more extensive evaluation prior to selection for
    preclinical development.

                  In addition to our CRF  antagonist  program which is partnered
with Janssen,  we are conducting an independent program directed to the research

and development of novel CRF receptor  antagonist  compounds for use in anxiety/
depression,  stroke and sleep disorder.  Our novel CRF antagonist compounds have
shown efficacy in preliminary experiments in animal models.

         Gonadotrophin-Releasing  Hormone ("GnRH") is a hypothalmic  decapeptide
that stimulates the secretion of the pituitary gonatrophins, luteinizing hormone
and follicle stimulating  hormone.  GnRH receptor antagonists and super-agonists
have been shown to shutdown the reproductive  endocrine axis and have utility in
the treatment of hormone dependent proliferative diseases such an endometriosis,
prostate  carcinoma and breast cancer. We have screened small molecule libraries
and identified novel GnRH receptor antagonist compounds.


                                   -4-

<PAGE>
         Excitatory  Amino Acid  Transporters  ("EAATs")  modulate the levels of
glutamate in the brain and are novel targets for the  development  of drugs.  We
are collaborating with Wyeth-Ayerst in the research and development of compounds
that  modulate  EAATs for the  treatment of  neurodegenerative  and  psychiatric
disorders.

         Melanocortin  receptors  are  involved  in the  control  of  endocrine,
autonomic and central nervous system. Our consultants and scientists have cloned
several melancortin receptors and we are conducting research to identify avenues
for the  discovery  of  effective  therapies  for  the  treatment  of  endocrine
functions modulated by these receptors such as obesity.

         In humans narcolepsy is characterized by excessive  daytime  sleepiness
and  abnormal  REM sleep and  affects  0.02% to 0.06% of the  population  in the
United States and Western Europe. As a possible therapy for the human disease we
are  looking at the  development  of an orexin  receptor  agonist.  The  orexins
consist of two small  peptides (28 and 33 amino acids) that are expressed in the
brain and have been linked to a variety of activities including,  the control of
feeding,  cardiovascular  regulation,  water  intake  and  sleep.  There are two
closely  related  receptors (1 and 2) for the orexin peptides that are expressed
in different areas of the brain and most likely mediate  different  functions of
the orexin peptides.  Both orexin receptor agonists (narcolepsy) and antagonists
(insomnia)  may have  potential  value for drug  development.  We have  recently
screened  a small  molecule  library  to  identify  antagonists  for the  orexin
receptor.  A small number of low affinity molecules resulted from the screen and
these compounds are now being used to further characterize the orexin system.

                  Chemokines are  immune/inflammatory  mediators that may have a
role in central  nervous  system  inflammation  and leukocyte  invasion.  We are
engaged in small molecule  library  screening and structure  activity studies to
identify compounds that act as antagonists of these mediators.

Business Strategy

         Our  strategy  is to utilize  our  understanding  of the biology of the
central  nervous,  immune and  endocrine  systems to identify and develop  novel
therapeutics. There are five key elements to our business strategy:

     Target Multiple Product Platforms.  We believe that certain central nervous
system drug targets,  such as CRF,  EAATs and MCH represent  significant  market
opportunities in psychiatric,  neurologic and metabolic disorders. Immunological
targets, such as altered peptide ligands,  offer therapeutic  strategies related
to autoimmune  diseases.  Chemokines  and GnRH allow us to combine our endocrine
and immunology expertise with new drug discovery  technologies to identify novel
product opportunities.

     Identify Novel Neuroscience and Immunology Drug Targets for the Development
of  Therapeutics  Which  Address  Large Unmet  Market  Opportunities.  We employ
molecular biology as an enabling  discipline to identify novel drug targets such
as  receptors,   genes  and   gene-related   products.   We  also  use  advanced
technologies, including combinatorial chemistry, high-throughput screening, gene
sequencing  and  bioinformatics,  to discover and develop  novel small  molecule
therapeutics.

     Leverage Strategic Alliances to Enhance  Development and  Commercialization
Capabilities.   We  intend  to  leverage   the   development,   regulatory   and
commercialization   expertise  of  our  corporate  partners  to  accelerate  the
development  of  our  potential   products,   while  we  retain   commercial  or
co-promotion rights in North America.

                                      -5-
<PAGE>

     Outsource  Capital  Intensive and  Non-Strategic  Activities.  We intend to
focus our resources on research and  development  activities by outsourcing  our
requirements  for  manufacturing,  preclinical  testing and clinical  monitoring
activities.

     Acquire Complementary Research and Development Drug Candidates.  We plan to
continue to selectively acquire rights to products in various stages of research
and clinical  development  in the fields of  neurology  and  immunology  to take
advantage of the  development and future  commercialization  capabilities we are
developing in cooperation with our strategic partners.

Recent Developments

         On November  29,  1999,  Neurocrine  announced  results from a Phase II
clinical trial  demonstrating  that NBI-34060 is a robust  sedative  hypnotic as
demonstrated  by a highly  statistically  significant  and  clinically  relevant
effect in  inducing  sleep when  compared to placebo.  These data  confirm  that
NBI-34060 is safe and  effective in helping  subjects  with  transient  insomnia
achieve rapid sleep induction without next day residual effects  associated with
most currently marketed sleep hypnotics.

         The  results  indicate  statistical  significance  was  reached for the
primary  clinical  endpoint  (Latency to  Persistent  Sleep-LPS),  the  required
regulatory  endpoint for approval.  In this study,  which enrolled 228 transient
insomnia subjects,  those subjects receiving  NBI-34060 the mean time to LPS was
16 minutes  compared to 34 minutes in the placebo  group (p less than .001).  In
addition,  the data  indicated  that a majority of subjects in the treated group
fell asleep  within 9 minutes as indicated by the median time to LPS as compared
to 23 minutes in the placebo group.

         The Phase II clinical  trial was a  randomized-double  blinded  placebo
controlled,  multi-center  Phase II clinical  trial of NBI-34060 in 228 subjects
with transient  insomnia.  The study was conducted in a sleep laboratory setting
employing objective polysomnographic  assessments.  The safety findings indicate
that  NBI-34060 was safe and well  tolerated at doses up to 30 mg. There were no
serious adverse events reported in this clinical trial.  Overall there was a low
incidence  of adverse  effects,  which was  comparable  to that  observed in the
placebo group with no residual next day hangover effects.

         Neurocrine  is  moving  rapidly  to  expand  clinical   development  of
NBI-34060 and plans to initiate a dose-response,  randomized-placebo controlled,
multi-center  Phase II study in over 550 subjects in the 2nd Quarter 2000. These
studies  will be conducted  in subjects  with chronic  insomnia and will include
other subject  sub-groups.  Neurocrine  is also  designing a large scale pivotal
Phase III program in more than 1500 subjects scheduled to begin in late 2000.

                  In  addition  at an  investor  conference  in early  December,
Florian  Holsboer,  M.D.,  Ph.D. of the Max Planck  Institute for  Psychiatry in
Germany presented  preliminary  safety and efficacy results on 20 subjects in an
open-label  Phase II study with a CRF receptor  antagonist  (R121919/NBI-30775).
Neurocrine  and  Janssen   Pharmaceutica   are  developing   this  compound  for
anxiety/depression.  Results suggests an improvement in widely accepted measures
of  anxiety  and  depression.  Comprehensive  findings  from this  trial will be
finalized in early 2000.

        On December 21, 1999,  the Company  signed a definitive  agreement  with
Paladin Labs Inc. (Vancouver: PLB) for the sale of exclusive worldwide rights to
Neurocrine's neurosteroid program as well as the sale of its Canadian affiliate,
Neuroscience  Pharma,  Inc.  Under the terms of the Agreement,  Neurocrine  will
receive  approximately  $2.0  million and will  receive  royalties  on worldwide
product sales.

        On December 25, 1999  Neurocrine  Biosciences,  Inc. signed an exclusive
agreement  with  Taisho  Pharmaceutical  Co. LTD  providing  Taisho an option to
obtain  European and Asian  commercialization  rights for  Neurocrine's  altered
peptide ligand (APL) for diabetes (NBI-6024). Neurocrine would retain all rights
in the rest of the world,  including North America. The resulting  collaboration
could be valued at up to $45 million;  consisting  of licensing and option fees,
payments for certain development and regulatory milestones, and reimbursement of
50% of the worldwide development expenses. In addition, Neurocrine would receive
royalties on product sales in Europe and Japan.

                                      -6-

<PAGE>
                                  RISK FACTORS

This  Prospectus  contains  forward-looking  statements  that involve  risks and
uncertainties.  Actual results could differ  materially  from those discussed in
the forward-looking statements, including those set forth below and elsewhere in
this Prospectus.  Words such as "expects,"  "anticipates,"  "intends,"  "plans,"
"believes,"  "seeks,"  "estimates" and similar expressions or variations of such
words are  intended  to  identify  forward-looking  statements,  but are not the
exclusive  means  of  identifying  forward-looking   statements.   Additionally,
statements  concerning  future matters such as the  development of new services,
technology  enhancements,  possible  changes in legislation and other statements
regarding  matters  that  are not  historical  are  forward-looking  statements.
Although  forward-looking  statements  herein reflect the good faith judgment of
the Company's management, such statements can only be based on facts and factors
currently  known by the Company.  Consequently,  forward-looking  statements are
inherently subject to risks and  uncertainties,  and actual results and outcomes
may differ materially from results and outcomes discussed in the forward-looking
statements. Factors that could cause or contribute to such differences in result
and outcomes  include without  limitation those discussed below as well as those
discussed  elsewhere  herein.  Readers are urged not to place undue  reliance on
these  forward-looking  statements,  which  speak  only  as of the  date of this
Propectus.  The  Company's  business,   results  of  operations,  and  financial
condition are, and will continue to be, subject to the following risks:

         All of the  Company's  Product  Candidates  are at an  Early  Stage  of
Development.  All of our product  candidates are in research or development.  We
have not requested or received  regulatory approval to commercialize any product
from the  United  States  Food  and Drug  Administration  ("FDA")  or any  other
regulatory body. Any products which may result from our research and development
programs  are not  expected to be  commercially  available  for the  foreseeable
future, if at all.

         The development of new pharmaceutical  products is highly uncertain and
subject to a number of significant  risks.  Potential products that appear to be
promising at early stages of  development  may not reach the market for a number
of reasons.  Such reasons include the possibilities  that the potential products
will:

o    be found  ineffective  or cause  harmful  side effects  during  preclinical
     testing or clinical trials

o    fail to receive necessary regulatory approvals

o    be difficult to manufacture on a large scale

o    be uneconomical or fail to achieve market acceptance

o    be precluded from commercialization by proprietary rights of third parties

         Our product  candidates  require  significant  additional  research and
development efforts. We cannot guarantee that:

o    regulatory  authorities  will approve the continued  development of the our
     development candidates

o    clinical development of any of our development candidates will successfully
     proceed through clinical trials

                                      -7-

<PAGE>
o    later stage clinical  trials of our  development  candidates will show that
     they are effective in treatment humans

o    required regulatory approvals will be obtained on a timely basis, if at all

o    any  products  for which  approval  is obtained  will be  approved  for the
     indications requested or be commercially successful

If any of these  potential  problems  occurs,  our business  would be materially
affected and the price of our stock could decline.

         The Company is Dependence on Strategic Alliances. We are dependent upon
our corporate  partners to provide adequate funding for certain of our programs.
Under these  arrangements,  the our corporate  partners are  responsible for (i)
selecting  compounds  for  subsequent  development  as  drug  candidates,   (ii)
conducting  preclinical  testing  and  clinical  trials and  obtaining  required
regulatory  approvals for such drug candidates,  and/or (iii)  manufacturing and
commercializing  any  resulting  drugs.  Failure  of our  partners  to  select a
compound we have discovered for subsequent development into marketable products,
gain the requisite regulatory approvals or successfully  commercialize  products
would have a material  adverse effect on our business,  financial  condition and
results of operations.  Our strategy for  development and  commercialization  of
certain of our products is dependent upon entering into additional  arrangements
with  research  collaborators,  corporate  partners  and  others,  and  upon the
subsequent success of these third parties in performing their obligations. There
can be no  assurance  that we will be able to enter  into  additional  strategic
alliances on  favorable  terms,  or at all. If we fail to enter into  additional
strategic  alliances,  it would have a material  adverse effect on our business,
financial condition and results of operations.

     We cannot  control the amount and timing of  resources  that our  corporate
partners devote to our partnered programs or potential  products.  If any of our
corporate  partners  breach or terminate  their  agreements with us or otherwise
fail  to  conduct  their  collaborative  activities  in  a  timely  manner,  the
preclinical  testing,  clinical  development  or  commercialization  of  product
candidates  will be  delayed,  and we  will be  required  to  devote  additional
resources to product  development and  commercialization,  or terminate  certain
development  programs.   Our  strategic  alliances  with  Janssen,   Lilly,  and
Wyeth-Ayerst  are subject to termination  by Janssen,  Lilly,  or  Wyeth-Ayerst,
respectively.  There can be no assurance that Janssen,  Lilly,  or  Wyeth-Ayerst
will  not  elect  to  terminate  its  strategic  alliance  with us  prior to its
scheduled  expiration.  In addition,  if our corporate  partners effect a merger
with a third party, there can be no assurance that the strategic  alliances will
not be terminated or otherwise materially adversely affected. The termination of
any current or future  strategic  alliances could have a material adverse effect
on our business,  financial  condition and results of operations.  Our corporate
partners may develop,  either alone or with others,  products  that compete with
the  development  and  marketing of our  products.  Competing  products,  either
developed by our  corporate  partners or to which our  corporate  partners  have
rights,  may  result in their  withdrawal  of support  with  respect to all or a
portion of the our technology, which would have a material adverse effect on our
business,  financial  condition  and  results  of  operations.  There  can be no
assurance  that  disputes  will not  arise in the  future  with  respect  to the
ownership  of rights to any  products or  technology  developed  with  corporate
partners.  These and other possible  disagreements  with our corporate  partners
could   lead  to  delays  in  the   collaborative   research,   development   or
commercialization  of  certain of our  product  candidates  or could  require or
result  in  litigation  or  arbitration,   which  would  be  time-consuming  and
expensive,  and would have a material adverse effect on our business,  financial
condition and results of operations.

         The Company has no Manufacturing Capabilities and Relies on Third Party
Contractors.  We have in the past  utilized,  and intend to continue to utilize,
third party manufacturing for the production of material for use in our clinical
trials and for the potential  commercialization of our future products.  We have
no experience in manufacturing  products for commercial purposes and do not have
any manufacturing facilities.  Consequently, we are solely dependent on contract
manufacturers  for all  production of products for  development  and  commercial
purposes.  In the event  that we are  unable  to  obtain  or retain  third-party
manufacturing, we will not be able to commercialize our products as planned. The
manufacture  of our  products  for clinical  trials and  commercial  purposes is
subject to cGMP  regulations  promulgated  by the FDA. No assurance can be given
that our third-party  manufacturers  will comply with cGMP  regulations or other
regulatory  requirements now or in the future. Our current dependence upon third
parties for the  manufacture  of our  products may  adversely  affect our profit
margin,  if any, on the sale of our future  products  and our ability to develop
and deliver products on a timely and competitive basis.


                                   -8-

<PAGE>

         The Company has no  Marketing or Sales Force;  The  Company's  Products
will be Subject to Sales and Pharmaceutical  Pricing Controls.  We have retained
certain marketing or co-promotion  rights in North America to our products under
development, and we plan to establish its own North American marketing and sales
organization.   We  currently   have  no  experience  in  marketing  or  selling
pharmaceutical products and we do not have a marketing and sales staff. In order
to achieve  commercial success for any product candidate approved by the FDA, we
must either develop a marketing and sales force or enter into  arrangements with
third parties to market and sell our products. There can be no assurance that we
will successfully  develop such experience or that we will be able to enter into
marketing and sales agreements with others on acceptable terms, if at all. If we
develop our own  marketing  and sales  capabilities,  we will compete with other
companies that currently have  experienced  and well funded  marketing and sales
operations. To the extent that we enter into co-promotion or other marketing and
sales  arrangements  with other  companies,  any  revenues  we  receive  will be
dependent  on the  efforts of others,  and there can be no  assurance  that such
efforts will be successful.

     Our business may be materially adversely affected by the continuing efforts
of  government  and third party  payers to contain or reduce the costs of health
care through various means. For example, in certain foreign markets,  pricing or
profitability of prescription  pharmaceuticals is subject to government control.
In the United States, there have been, and we expect that there will continue to
be, a number of federal and state  proposals  to  implement  similar  government
control in such  jurisdictions.  In addition,  an increasing emphasis on managed
care in the  United  States  has put,  and will  continue  to put,  pressure  on
pharmaceutical  pricing.  Such  initiatives  and  proposals,  if adopted,  could
decrease  the price that we receive for any  products we may develop and sell in
the  future,  and  thereby  have a  material  adverse  effect  on our  business,
financial condition and results of operations.  Further, to the extent that such
proposals or initiatives have a material adverse effect on other  pharmaceutical
companies that may be corporate  partners or prospective  corporate partners for
certain our  potential  products,  our ability to  commercialize  our  potential
products may be materially adversely affected.

     Our ability to commercialize  pharmaceutical products may depend in part on
the extent to which  reimbursement  for the costs of such  products  and related
treatments will be available from government health administration  authorities,
private health insurers and other third-party  payers.  Significant  uncertainty
exists as to the  reimbursement  status of newly approved  health care products,
and  third-party  payers are  increasingly  challenging  the prices  charged for
medical  products and services.  There can be no assurance that any  third-party
insurance  coverage  will be  available to patients for any products we develop.
Government and other third-party  payors are increasingly  attempting to contain
health care costs by limiting both coverage and the level of  reimbursement  for
new therapeutic  products,  and by refusing,  in some cases, to provide coverage
for uses of approved products for disease  indications for which the FDA has not
granted marketing approval.  If government and third party payors do not provide
adequate  coverage  and  reimbursement  levels  for  our  products,  the  market
acceptance of our products would be materially adversely affected.

         The  Company  Faces  Intense   Competition.   The   biotechnology   and
pharmaceutical industries are subject to rapid and intense technological change.
We face, and will continue to face, competition in the development and marketing
of its product  candidates  from  academic  institutions,  government  agencies,
research   institutions  and   biotechnology   and   pharmaceutical   companies.
Competition  may arise  from  other drug  development  technologies,  methods of
preventing or reducing the  incidence of disease,  including  vaccines,  and new
small molecule or other classes of therapeutic agents. There can be no assurance
that  developments  by  others  will  not  render  our  product   candidates  or
technologies obsolete or noncompetitive.

                                      -9-

<PAGE>

      We are developing  products for the treatment of anxiety disorders,  which
will  compete  with  well-established  products  in  the  benzodiazepine  class,
including Valium, marketed by Hoffman-La Roche, Inc., and depression, which will
compete with well-established  products in the anti-depressant  class, including
Prozac,  marketed  by Eli  Lilly & Co.,  Zoloft  marketed  by  Pfizer  and Paxil
marketed by Smith Kline Beecham. Certain technologies under development by other
pharmaceutical companies could result in treatments for these and other diseases
and disorders.  In addition,  a number of companies are  conducting  research on
molecules to block CRF to treat anxiety and depression.

     We  are  also  developing  a  non-benzodiazepine  GABA-A  agonist  for  the
treatment  of   Insomnia.   Ambien   (Zolpidem)   and  Sonata   (Zaleplon)   are
non-benzodiazepine  GABA-A  agonists  currently  marketed  for the  treatment of
Insomnia by Searle/Synthelabo and American Home Products, respectively.

     Guilford  Pharmaceuticals,  Inc.  has  developed  Gliadel  which  has  been
approved for use as an adjunct to surgery to prolong  survival in patients  with
recurrent  multiforme  glioblastoma for whom surgical resection is indicated and
will compete with our IL-4 Fusion toxin product NBI-3001.  Temozolomide marketed
by Schering Plough may also compete with NBI-3001.

     Products that may be competitive  with NBI-5788 APL for Multiple  Sclerosis
include  Betaseron  and Avonex,  similar  forms of  beta-interferon  marketed by
Berlex BioSciences and Biogen, Inc.,  respectively.  Copaxone, a peptide polymer
marketed by Teva,  has also been approved for the marketing in the United States
and certain other  countries for the treatment of relapsing  remitting  multiple
sclerosis.

     There are a number of  competitors  to products in our  research  pipeline.
Tacrine,  marketed by Warner-Lambert  Co., and Aricept,  marketed by Pfizer Inc,
have been approved for the  treatment of  Alzheimer's  dementia.  Sales of these
drugs may  reduce the  available  market  for any  product we develop  for these
indications.  Other  biotechnology and  pharmaceutical  companies are developing
compounds  to treat  obesity.  In the event  that one or more of these  products
and/or  programs are  successful,  the market for our products may be reduced or
eliminated.

     In  addition,   if  we  receive  regulatory  approvals  for  our  products,
manufacturing efficiency and marketing capabilities are likely to be significant
competitive  factors.  At the present time, we have no commercial  manufacturing
capability,  sales  force or  marketing  experience.  In  addition,  many of our
competitors  and  potential   competitors  have  substantially  greater  capital
resources,  research and  development  resources,  manufacturing  and  marketing
experience and production  facilities than we do. Many of these competitors also
have  significantly  greater  experience  than we do in undertaking  preclinical
testing and clinical trials of new pharmaceutical products and obtaining FDA and
other regulatory approvals.

         The Company's  Success is Dependent on Patents and Proprietary  Rights.
Our  success  will  depend on our ability to obtain  patent  protection  for our
products, preserve our trade secrets, prevent third parties from infringing upon
our  proprietary  rights,  and operate  without  infringing upon the proprietary
rights of others, both in the United States and internationally.  Because of the
substantial  length of time and expense  associated  with  bringing new products
through the development and regulatory  approval processes in order to reach the
marketplace,  the  pharmaceutical  industry  places  considerable  importance on
obtaining patent and trade secret protection for new technologies,  products and
processes.  Accordingly, we intend to seek patent protection for our proprietary
technology  and  compounds.  There  can be no  assurance  as to the  success  or
timeliness in obtaining any such patents,  that the breadth of claims  obtained,
if any,  will provide  adequate  protection  of our  proprietary  technology  or
compounds,  or that we will be able to  adequately  enforce  any such  claims to
protect its proprietary  technology and compounds.  Since patent applications in
the United States are  confidential  until the patents issue, and publication of
discoveries  in the  scientific or patent  literature  tend to lag behind actual
discoveries  by  several  months,  we cannot be  certain  that we were the first
creators of inventions  covered by pending patent  applications  or that we were
the first to file patent  applications  for such inventions.  Litigation,  which
could  result in  substantial  cost,  may be necessary to enforce our patent and
license rights.


                                      -10-
<PAGE>


         The degree of patent protection  afforded to pharmaceutical  inventions
is  uncertain  and any  patents  that may issue  with  regard  to our  potential
products  will be subject to this  uncertainty.  There can be no assurance  that
competitors  will not develop  competitive  products outside the protection that
may be afforded by the claims of our patents.  Other potential  products that we
may develop may be novel and therefore  would not be covered by  composition  of
matter  patent  claims.  In  addition,  we  are  aware  of a  number  of  patent
applications,  both domestic and European,  relating to neurological  compounds,
and in particular CRF receptor antagonist potential therapeutics, that have been
filed by or are  controlled by other  entities,  including our  competitors  and
potential competitors. There can be no assurance that our potential products can
be  commercialized  without a license to any  patents  which may issue from such
applications.

         We may be required to obtain licenses to patents or proprietary  rights
of others.  As the  biotechnology  industry expands and more patents are issued,
the risk  increases  that our  potential  product may require  licenses of third
party  technologies.  No assurance can be given that any licenses required under
any patents or  proprietary  rights of third parties would be made  available on
acceptable  terms,  or at all.  If we do not  obtain  such  licenses,  we  could
encounter  delays in product  introductions  while we attempts to design  around
such  patents,  or we could find that the  development,  manufacture  or sale of
products  requiring  such  licenses  could  be  foreclosed.  Litigation  may  be
necessary to defend against or assert such claims of infringement to enforce our
issued patents and to protect our trade secrets or know-how, or to determine the
scope  and  validity  of  the  proprietary   rights  of  others.   In  addition,
interference  proceedings  declared by the United  States  Patent and  Trademark
Office may be necessary to determine the priority of inventions  with respect to
our patent  applications  or those of our licensors.  Litigation or interference
proceedings could result in substantial costs to and diversion of effort by, and
may have a  material  adverse  impact  on,  us.  In  addition,  there  can be no
assurance that our efforts would be successful.

         We also rely upon unpatented trade secrets and improvements, unpatented
know-how and  continuing  technological  innovation  to develop and maintain our
competitive  position,  which we seek to protect,  in part,  by  confidentiality
agreements   with  our  commercial   partners,   collaborators,   employees  and
consultants.  We also have invention or patent  assignment  agreements  with our
employees and certain,  but not all, commercial partners and consultants.  There
can be no assurance that a person not bound by an invention assignment agreement
will not develop  relevant  inventions.  There can be no assurance  that binding
agreements  will not be breached,  that we will have  adequate  remedies for any
breach,  or that  our  trade  secrets  will  not  otherwise  become  known or be
independently discovered by competitors.

         As is commonplace in the biotechnology  industry, we employ individuals
who were previously employed at other biotechnology or pharmaceutical companies,
including our competitors or potential competitors.  To the extent our employees
are involved in research  areas at the Company  which are similar to those areas
in which  they were  involved  at their  former  employer,  we may be subject to
claims that such employees  and/or the Company have  inadvertently  or otherwise
used or disclosed the alleged trade secrets or other proprietary  information of
the former employers. Litigation may be necessary to defend against such claims,
which could result in substantial costs and be a distraction to management,  and
which  may  have a  material  adverse  effect  on the  Company,  even  if we are
successful in defending such claims.

         The  Company  and  its  Products  are  Subject  to  Strict   Government
Regulation.  Regulation  by  government  authorities  in the  United  States and
foreign  countries is a significant  factor in the development,  manufacture and
marketing  of our  proposed  products  and in our ongoing  research  and product
development activities.  All of our products will require regulatory approval by
government agencies prior to commercialization. In particular, human therapeutic
products are subject to rigorous  preclinical  testing and  clinical  trials and
other  approval  procedures  of the FDA and similar  regulatory  authorities  in
foreign  countries.  Various  federal and state  statutes and  regulations  also
govern or  influence  testing,  manufacturing,  safety,  labeling,  storage  and
record-keeping  related to such  products  and their  marketing.  The process of
obtaining  these  approvals  and  the  subsequent  substantial  compliance  with
appropriate  federal and state statutes and regulations  require the expenditure
of substantial time and financial resources.  If we fail or our collaborators or
licensees  fail to obtain,  or encounter  delays in  obtaining  or  maintaining,
regulatory  approvals it could adversely affect the marketing of any products we
develop,  our ability to receive  product or royalty  revenues and our liquidity
and capital resources.

                                      -11-

<PAGE>

         Preclinical  testing is generally  conducted in  laboratory  animals to
evaluate  the  potential  safety and the  efficacy of a product.  The results of
these  studies  are  submitted  to the FDA as a part of an  IND,  which  must be
approved  before  clinical  trials  in humans  can  begin.  Typically,  clinical
evaluation involves a time consuming and costly three-phase process.

Phase I                         Clinical  trials are  conducted  with a small
                                number of subjects to determine the early safety
                                profile,  the pattern of drug  distribution  and
                                metabolism.

Phase II                        Clinical  trials are conducted with groups of
                                patients  afflicted  with a specific  disease in
                                order to determine preliminary efficacy, optimal
                                dosages and expanded evidence of safety.

Phase III                       Large-scale,   multi-center,   comparative
                                trials are  conducted  with  patients  afflicted
                                with a target disease in order to provide enough
                                data to demonstrate  with  substantial  evidence
                                the efficacy and safety required by the FDA.

         The FDA closely  monitors  the  progress of each of the three phases of
clinical  trials and may,  at its  discretion,  re-evaluate,  alter,  suspend or
terminate  the testing based upon the data which have been  accumulated  to that
point and its assessment of the risk/benefit ratio to the patient.

         The results of preclinical testing and clinical trials are submitted to
the FDA in the form of an NDA or BLA for approval to commence  commercial sales.
In responding to an NDA or BLA, the FDA may grant  marketing  approval,  request
additional  information or deny the  application if the FDA determines  that the
application does not satisfy its regulatory  approval criteria.  There can be no
assurance  that  approvals  will be  granted on a timely  basis (or at all).  If
approved,  there can be no assurance that such approval will include  acceptable
labeling to adequately  commercialize the product. Similar regulatory procedures
must also be complied with in countries outside the United States.

         The results from preclinical  testing and early clinical trials may not
be predictive of results obtained in later clinical trials.  As a result,  there
can be no assurance  that clinical  trials we conduct or our corporate  partners
conduct will demonstrate  sufficient safety and efficacy to obtain the requisite
regulatory  approvals  or will  result  in  marketable  products  or  marketable
indications.  In addition,  late stage clinical  trials are often conducted with
patients  having  the most  advanced  stages of  disease.  During  the course of
treatment,  these patients can die or suffer other adverse  medical  effects for
reasons  that may not be related to the  pharmaceutical  agent being  tested but
which can  nevertheless  adversely  affect  clinical trial results.  A number of
companies in the  biotechnology  and  pharmaceutical  industries  have  suffered
significant  setbacks in advanced clinical trials,  even after promising results
in  earlier  trials.  If the our drug  candidates  are not  shown to be safe and
effective in clinical trials, the resulting delays in developing other compounds
and conducting related  preclinical  testing and clinical trials, as well as the
potential need for additional financing, would have a material adverse effect on
our business, financial condition and results of operations.

         The rate of completion of clinical trials we or our corporate  partners
conduct may be delayed by many factors,  including  slower than expected patient
recruitment or unforeseen  safety issues.  Any delays in, or termination of, the
clinical  trials for our products  would have a material  adverse  effect on our
business,  financial  condition  and  results  of  operations.  There  can be no
assurance  that we or our  corporate  partners  will be permitted by  regulatory
authorities to undertake clinical trials for our products or, if such trials are
conducted,  that  any of our  product  candidates  will  prove  to be  safe  and
efficacious or will receive regulatory approvals.

                                      -12-

<PAGE>

         There Can Be No  Assurance  that the  Company's  Products  will Achieve
Market Acceptance.  The commercial success of our products that are approved for
marketing will depend upon their acceptance by the medical community as safe and
effective.  Factors we believe will materially  affect the market  acceptance of
our products are timing of receipt of marketing  approvals,  safety and efficacy
of  the  product,   emergence  of  equivalent  or  superior  products  and  cost
effectiveness of the product

         The  Company  will  Require   Additional   Funding.   We  will  require
substantial  additional  funding in order to continue  our  research and product
development  programs,  including preclinical testing and clinical trials of our
product candidates,  for operating  expenses,  and for the pursuit of regulatory
approvals  for  product  candidates.  We  may  require  additional  funding  for
establishing  manufacturing and marketing capabilities in the future. We believe
that our existing  capital  resources,  together with interest income and future
payments  due under  strategic  alliances,  will be  sufficient  to satisfy  our
current and projected funding requirements through ---. However,  such resources
might be insufficient to conduct  research and development  programs as planned.
Our future  capital  requirements  will  depend on many  factors,  including:

o    continued  scientific progress in its research and development  programs, o
     the magnitude of our R&D programs,

o    progress with preclinical testing and clinical trials,

o    the time and costs involved in obtaining regulatory approvals,

o    the costs  involved  in filing  and  prosecuting  patent  applications  and
     enforcing patent claims,

o    competing technological and market developments,

o    the establishment of additional strategic alliances,

o    the cost of manufacturing  facilities and of  commercialization  activities
     and arrangements, and

o    the cost of product in-licensing and any possible acquisitions.

         Our cash  reserves and other liquid  assets  together with funding that
may be received  under our  strategic  alliances,  and  interest  income  earned
thereon, might be inadequate to satisfy our capital and operating requirements.

         We intend to seek additional funding through strategic  alliances,  and
may seek  additional  funding through public or private sales of our securities,
including equity securities.  In addition, we have obtained equipment leases and
may continue to pursue  opportunities to obtain additional debt financing in the
future.  However,  additional equity or debt financing might not be available on
reasonable  terms, if at all. Any additional equity financings would be dilutive
to our stockholders.  If adequate funds are not available, we may be required to
curtail  significantly  one or more of our  research  and  development  programs
and/or obtain funds through  arrangements with corporate partners or others that
may require us to relinquish  rights to certain of our  technologies  or product
candidates.

         The Company  Depends on Key  Management  and  Employees.  We are highly
dependent on the principal  members of our management and scientific  staff. The
loss of any of these  people  could impede the  achievement  of our  development
objectives. Furthermore, recruiting and retaining qualified scientific personnel
to perform  research and development work in the future will also be critical to
the our  success.  We might  be  unable  to  attract  and  retain  personnel  on
acceptable terms given the competition among  biotechnology,  pharmaceutical and
health care companies,  universities  and non-profit  research  institutions for
experienced  scientists.  In  addition,  we rely on  members  of our  Scientific
Advisory  Board  and  a  significant  number  of  consultants  to  assist  us in
formulating  our research and development  strategy.  All of the our consultants
and members of the  Scientific  Advisory  Board are employed by employers  other
than  Neurocrine.  They may have  commitments  to,  or  advisory  or  consulting
agreements with, other entities that may limit their availability to us.

                                      -13-

<PAGE>

         Potential  Product Liability  Exposure and Limited Insurance  Coverage.
The use of any of our potential products in clinical trials, and the sale of any
approved products, may expose us to liability claims. These claims might be made
directly by consumers, health care providers, pharmaceutical companies or others
selling such products.  We have obtained  limited  product  liability  insurance
coverage for our clinical  trials in the amount of $5 million per occurrence and
$5  million  in the  aggregate.  We intend to expand or  insurance  coverage  to
include the sale of  commercial  products if marketing  approval is obtained for
products in development.  However,  insurance coverage is becoming  increasingly
expensive,  and we  might  not be  able  to  maintain  insurance  coverage  at a
reasonable  cost or in  sufficient  amounts to protect us against  losses due to
liability.  We may be unable to obtain commercially reasonable product liability
insurance  for  any  products  approved  for  marketing.  A  successful  product
liability  claim or series of claims  brought  against  us could have a material
adverse effect on our business and cause our stock price to fall.

         The Company's  Activities  Involve  Hazardous  Materials.  Our research
activities  involve  the  controlled  use of  hazardous  materials.  We can  not
eliminate the risk of accidental  contamination  or injury from these materials.
In the event of an  accident,  we may be held liable for any  resulting  damages
which may materially and adversely affect our financial condition and results of
operations.

         The Price of the Company's Common Stock is Volatile.  The market prices
for securities of biotechnology and  pharmaceutical  companies have historically
been  highly  volatile,  and the  market  has  from  time  to  time  experienced
significant  price and volume  fluctuations  that are unrelated to the operating
performance of particular  companies.  The following factors may have an adverse
effect on our stock price:

o    fluctuations in operating results,

o    announcements of technological  innovations or new therapeutic  products by
     us or others,

o    clinical trial results,

o    developments concerning strategic alliance agreements,

o    government regulation,

o    developments in patent or other proprietary rights,

o    public concern as to the safety of our drugs,

o    future  sales of  substantial  amounts  of our  Common  Stock  by  existing
     stockholders,

o    comments by securities analysts and general market conditions.

         The  realization of any of the risks  described in these "Risk Factors"
could cause our stock price to fall dramatically.

         Potential Adverse Effect of Anti-takeover  Provisions.  Our Certificate
of  Incorporation  provides for staggered  terms for the members of our Board of
Directors  and does  not  provide  for  cumulative  voting  in the  election  of
directors.  In  addition,  our Board of  Directors  has the  authority,  without
further action by the  stockholders,  to fix the rights and  preferences of, and
issue shares of, Preferred Stock. In April 1997, we adopted a Stockholder Rights
Plan,  commonly  referred  to as a "Poison  Pill".  Further,  we are  subject to
Section 203 of the Delaware  General  Corporation Law which,  subject to certain
exceptions,  restricts certain transactions and business  combinations between a
corporation  and  a  stockholder   owning  15%  of  more  of  the  corporation's
outstanding  voting  stock  for a  period  of  three  years  from  the  date the
stockholder  becomes an interested  stockholder.  The  Stockholder  Rights Plan,
staggered board terms, lack of cumulative voting, Preferred Stock provisions and
other  provisions of the our charter and Delaware  corporate law may  discourage
certain types of transactions involving an actual or potential change in control
of the Company.

                                      -14-

<PAGE>

         Impact of Year  2000.  The Year 2000  Issue is the  result of  computer
programs  being  written  using  two  digits  rather  than  four to  define  the
applicable   year.   Any  of  our  computer   programs  or  hardware  that  have
date-sensitive software or embedded chips may recognize a date using "00" as the
year 1900 rather than the year 2000.  This could  result in a system  failure or
miscalculations  causing  disruptions  of  operations,  including,  among  other
things, a temporary inability to process transactions,  send invoices, or engage
in similar normal business activities.

         Lack of Liquidity.  Until registered under the Registration  Statement,
the Shares will be  restricted  securities  under federal and  applicable  state
securities laws and, as such, may not be transferred, sold or otherwise disposed
of, except as permitted  under federal and  applicable  state  securities  laws,
pursuant  to  registration   thereunder  or  exemption  therefrom.   Prospective
investors  should  be  prepared  to  hold,  and  bear  the  economic  risk of an
investment  in, the Shares for an indefinite  period.  In addition,  an Investor
should  be able to  withstand  a total  loss of its  investment.  The  rights of
Investors  to register the Common  Stock is subject and  subordinate  to certain
registration  rights  previously  granted by the Company to other parties.  As a
result,  under certain  circumstances,  the ability of Investors to register the
Common Stock may be delayed.



                                 USE OF PROCEEDS

         The Company will not receive any proceeds from the sale of common stock
by the selling shareholder in this offering.



                              SELLING SHAREHOLDERS

         On December 22, 1999, the Company  agreed to sell  2,327,777  shares of
Common  Stock  of the  Company  upon  meeting  certain  closing  conditions.  In
connection  with this sale, we agreed to file a registration  statement with the
SEC covering the resale of the shares  issued to each  selling  shareholder  and
agreed to indemnify  each selling  shareholder  against claims made against them
arising  out of,  among  other  things,  statements  made  in this  registration
statement.  We have  agreed  to cause  this  registration  statement  to  remain
effective until (a) all the common stock has been re-sold or (b) two years after
the  closing  of the  transactions  contemplated  in the common  stock  purchase
agreements, whichever is earlier.

                  The following table provides certain  information with respect
to shares of common stock held and to be offered under this prospectus from time
to time by each selling  shareholder.  Because the selling shareholders may sell
all or part of their common stock pursuant to this prospectus, and this offering
is not being  underwritten on a firm commitment  basis,  only an estimate can be
given as to the number  and  percentage  of shares of common  stock that will be
held by each selling shareholder upon termination of this offering. See "Plan of
Distribution."

         The Company is unaware of any material  relationship between any of the
selling  shareholders  and us in the past three  years other than as a result of
the ownership of the shares of common stock.

                                      -15-

<PAGE>
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------
                                                          Shares owned     Shares sold        Shares and
                                                           before the        in the        percentage owned
Name                                                        Offering        Offering      after the Offering
- ------------------------------------------------------------------------------------------------------------
<S>                                                           <C>            <C>            <C>     <C>
Biotech Target S.A.                                           750,000        500,000        250,000 (1.2%)
Deutsche Vermogensbildungsgesellschaft mbH                    600,000        600,000              - (  * )
Deutsche Asset Mangement Investmentgesellschaft mbH           300,000        300,000              - (  * )
SEB Lakemedelsfund                                            490,000        385,000        105,000 (  * )
SEB Private Bank S.A., Luxmeborg                               85,000         65,000         20,000 (  * )
Activest Management SA                                        327,000        277,777         50,000 (  * )
DWS Investment GmbH                                           435,000        200,000        235,000 (1.1%)
- ------------------
<FN>
o   Less than 1.00% *
o   There were 21,586,717 shares outstanding after the offering.
</FN>
</TABLE>



                              PLAN OF DISTRIBUTION

         The Company is  registering  the shares of common stock  offered by the
selling  shareholders  pursuant to contractual  registration rights contained in
the common stock purchase  agreements.  The selling  shareholders may sell their
shares  on  the  Nasdaq  National  Market,  in  private  transactions  or  in  a
combination  of such methods of sale.  The selling  shareholders  may sell their
shares at market prices  prevailing  at the time of sale,  at prices  related to
such  prevailing  market prices or at  negotiated or at fixed prices.  For their
shares,  the selling  shareholders will receive the purchase price of the shares
sold less any agents'  commissions or underwriters'  discounts and other related
expenses.  If the  selling  shareholders  sell  shares to or through  brokers or
dealers,  they  may pay the  brokers  or  dealers  compensation  in the  form of
discounts, concessions or commissions. We will not receive any proceeds from the
sale of shares by the selling shareholders.

         The selling shareholders and any persons who participate in the sale of
the shares may be deemed to be  "underwriters" as defined in the Securities Act,
and any discounts,  commissions or concessions received by them and any provided
pursuant to the sales of shares by them might be deemed  underwriting  discounts
and commissions under the Securities Act.

         In order to comply  with the  securities  laws of  certain  states,  if
applicable,  the common  stock may be sold in such  jurisdictions  only  through
registered or licensed  brokers or dealers.  In addition,  in certain states the
common stock may not be sold unless it has been registered or qualified for sale
or an exemption from registration or qualification requirements is available and
is complied with.

         We have agreed in the common stock purchase  agreements to register the
shares of our common stock received by the selling shareholders  pursuant to the
common stock purchase  agreements under applicable  federal and state securities
laws under certain  circumstances  and at certain times.  Pursuant to the common
stock purchase agreements, we have filed a registration statement related to the
shares  offered  hereby  and have  agreed  to keep such  registration  statement
effective until (a) all the common stock has been re-sold or (b) two years after
the  closing  of the  transactions  contemplated  in the Common  Stock  Purchase
Agreement, whichever is earlier.

         We will pay for the expenses incurred in this offering.

                                      -16-
<PAGE>

                                  LEGAL MATTERS

         The validity of the Shares offered hereby will be passed upon by Latham
& Watkins, counsel to the Company.

                                     EXPERTS

         The Company's  financial  statements  appearing in its Annual Report on
Form 10-K for the year ended  December  31,  1998,  have been audited by Ernst &
Young LLP, independent  auditors,  as set forth in their report thereon included
therein and  incorporated  herein by reference.  Such  financial  statements are
incorporated  herein by  reference  in reliance  upon such report given upon the
authority of such firm as experts in accounting and auditing.

                       WHERE YOU CAN FIND MORE INFORMATION

         We are  subject to the  informational  requirements  of the  Securities
Exchange Act of 1934,  as amended (the  "Exchange  Act").  Accordingly,  we file
annual,  quarterly and special reports,  proxy statements and other  information
with the Securities and Exchange  Commission (the "SEC").  You may read and copy
any  document  that we  have  filed  at the  SEC's  public  reference  rooms  in
Washington, D.C., New York, New York, and Chicago, Illinois. Please call the SEC
at 1-800-SEC-0330 for further information on the public reference rooms. You can
obtain  copies  of our SEC  filings  at  prescribed  rates  from the SEC  Public
Reference  Section at 450 Fifth Street,  N.W.,  Washington,  D.C. 20549. Our SEC
filings  are also  available  to you free of  charge  at the  SEC's  web site at
http://www.sec.gov.

         Shares of our common stock are traded as "National  Market  Securities"
on the Nasdaq National  Market.  Documents we have filed can be inspected at the
offices  of the  National  Association  of  Securities  Dealers,  Inc.,  Reports
Section, 1735 K Street, N.W., Washington, D.C. 20006.

         You can read and print press releases and additional  information about
us, free of charge, at our web site at http://www.neurocrine.com.

         This  Prospectus  is a part of a  Registration  Statement  on Form  S-3
(together  with all amendments  and exhibits,  referred to as the  "Registration
Statement")  filed by us with  the SEC  under  the  Securities  Act of 1993,  as
amended.  This  Prospectus  does not contain all of the information set forth in
the  Registration  Statement,  certain  parts of which are omitted in accordance
with the rules and regulations of the SEC. For further  information with respect
to Neurocrine and the shares of common stock offered hereby, please refer to the
Registration  Statement.  The  Registration  Statement  may be  inspected at the
public  reference  facilities  maintained  by the SEC at the addresses set forth
above.  Statements in this Prospectus about any document filed as an exhibit are
not necessarily complete and, in each instance,  you should refer to the copy of
such  document  filed with the SEC.  Each such  statement  is  qualified  in its
entirety by such reference.

                      INFORMATION INCORPORATED BY REFERENCE

         The SEC allows us to "incorporate  by reference" the information  filed
with them,  which means that we can  disclose  important  information  to you by
referring you to those documents.  The information  incorporated by reference is
considered to be part of this  Prospectus,  and  information  that we have filed
later with the SEC will  automatically  update and  supersede  previously  filed
information, including information contained in this Prospectus.

         The Company  incorporates  by reference the documents  listed below and
any future filings it will make with the SEC under Sections 13(a),  13(c), 14 or
15(d) of the Exchange Act until this offering has been completed:

                                      -17-
<PAGE>

      (1)  Annual Report on Form 10-K for the fiscal year ended December 31,1998
          (File No. 000-22705)

     (2)  Quarterly  Report on Form 10-Q for the quarters  ended March 31, 1999,
          June 30, 1999 and September 30, 1999;

     (3)  Proxy Statement for the Annual Meeting of Stockholders held on May 21,
          1999, filed with the SEC on April 23, 1999; and

     (4)  The  description  of our Common Stock  contained  in the  Registration
          Statement on Form S-1, (Registration No. 333-03172), as amended, which
          was declared effective by the SEC on May 22, 1996.

         You may request a free copy of these  documents  by writing to Investor
Relations,  Neurocrine Biosciences, Inc., 10555 Science Center Drive, San Diego,
CA 92121,  or by calling  Neurocrine's  Investor  Relations  department at (858)
658-7600.

         You should rely only on the  information  incorporated  by reference or
provided in this Prospectus or a prospectus supplement or amendment. The Company
has not authorized anyone to provide you with different information. The Company
is not making an offer of these  securities  in any state where the offer is not
permitted.  Also, this  Prospectus  does not offer to sell any securities  other
than the securities  covered by this Prospectus.  You should not assume that the
information  in this  Prospectus  or a  prospectus  supplement  or  amendment is
accurate as of any date other than the date on the front of the document.

                                      -18-
<PAGE>
<TABLE>
<CAPTION>

=======================================================             ====================================================
<S>                                                                 <C>

The Company has not authorized any person                                       NEUROCRINE BIOSCIENCES, INC.
to give any information or to make any
representations that differs from what is in this
Prospectus.  If any person does make a statement
that differs from what is in this Prospectus, you
should not rely on it.  This Prospectus is not an
offer to sell, nor is it seeking an offer to buy,                                    2,327,777 Shares
any security other than the Shares offered hereby.
This Prospectus is not an offer to sell, nor is it                                          of
seeking an offer to buy, these Shares in any
jurisdiction in which the offer or sale is                                             Common Stock
prohibited.  The information in this Prospectus is
complete and accurate as of its date, but the
information may change after that date.




                 TABLE OF CONTENTS                                                      PROSPECTUS

                                                 Page

Summary........................................     3
Risk Factors...................................     4
Business.......................................    15
Use of Proceeds................................    15
Selling Stockholders...........................    15
Plan of Distribution...........................    16
Legal Matters..................................    17
Experts........................................    17
Where You Can Find More Information............    17
Information Incorporated by Reference..........    18                                January __, 2000



=======================================================             ====================================================
</TABLE>

                                      -19-

<PAGE>


                                     PART II

                   INFORMATION NOT REQUIRED IN THE PROSPECTUS

Item 14.      Other Expenses of Issuance and Distribution.

         The Company and Selling  Shareholders will pay all expenses incident to
the offering and sale to the public of the shares  being  registered  other than
any  commissions  and  discounts  of  underwriters,  dealers  or agents  and any
transfer taxes.  Such expenses are set forth in the following  table. All of the
amounts  shown are  estimates  except  the SEC  registration  fee and the Nasdaq
National Market listing fee.

         SEC registration fee..........................................$ 18,443
         NASDAQ National Market listing fee..............................17,500
         Legal fees and expenses.........................................75,000
         Accounting fees and expenses....................................10,000
         Miscellaneous expenses..........................................25,000
                   Total..............................................$ 145,943

Item 15.      Indemnification of Directors and Officers.

         Section  145 of the  General  Corporation  Law of the State of Delaware
provides  that a  corporation  has the power to  indemnify a director,  officer,
employee or agent of the  corporation  and certain other persons  serving at the
request  of the  corporation  in related  capacities  against  amounts  paid and
expenses  incurred in connection with an action or proceeding to which he or she
is or is  threatened  to be made a party by  reason  of such  position,  if such
person has acted in good faith and in a manner he or she reasonably  believed to
be in or not  opposed to the best  interests  of the  corporation,  and,  in any
criminal  proceeding,  if such person had no reasonable  cause to believe his or
her conduct was unlawful; provided that, in the case of actions brought by or in
the right of the corporation, no indemnification may be made with respect to any
matter as to which such person has been adjudged to be liable to the corporation
unless and only to the extent that the  adjudicating  court determines that such
indemnification is proper under the circumstances.

         The Registrant's Certificate of Incorporation provides that no director
will be personally  liable to the  Registrant or its  stockholders  for monetary
damages for breach of fiduciary duty as a director, except for liability (i) for
any  breach  of  the  director's  duty  of  loyalty  to  the  Registrant  or its
stockholders,  (ii) for acts or  omissions  not in good  faith or which  involve
intentional  misconduct or a knowing violation of law, (iii) for authorizing the
payment of a dividend  or  repurchase  of stock or (iv) for any  transaction  in
which the director derived an improper personal benefit.

         The Registrant's by-laws provide that the Registrant must indemnify any
person  who  was or is a  party  or is  threatened  to be  made a  party  to any
threatened,  pending,  or completed action,  suit or proceeding,  whether civil,
criminal,  administrative  or  investigative  (other than an action by or in the
right  of the  Registrant)  by  reason  of the  fact  that he or she is or was a
director or officer of the  Registrant,  or that such  director or officer is or
was serving at the request of the Registrant as a director, officer, employee or
agent  of  another  corporation,  partnership,  joint  venture  trust  or  other
enterprise (collectively "Agent"), against expenses (including attorneys' fees),
judgments,  fines and amounts paid in settlement (if such settlement is approved
in advance by the Registrant,  which approval may not be unreasonably  withheld)
actually and reasonably  incurred by him or her in connection  with such action,
suit or  proceeding  if he or she acted in good  faith and in a manner he or she
reasonably  believed  to be in or not  opposed  to  the  best  interests  of the
Registrant,  and,  with respect to any  criminal  action or  proceeding,  had no
reasonable cause to believe his or her conduct was unlawful.  The termination of
any action, suit or proceeding by judgment,  order, settlement,  conviction,  or
upon a plea of nolo contendere or its equivalent,  will not, of itself, create a
presumption  that the person did not act in good faith and in a manner  which he
or she reasonably  believed to be in or not opposed to the best interests of the
Registrant,  and  with  respect  to  any  criminal  action  or  proceeding,  had
reasonable cause to believe that his or her conduct was unlawful.

                                   Page II-1
<PAGE>


         The  Registrant's  by-laws  provide  further that the  Registrant  must
indemnify  any person who was or is a party or is  threatened to be made a party
to any threatened, pending or completed action or suit by or in the right of the
Registrant  to procure a judgment  in its favor by reason of the fact that he or
she is or was an Agent against expenses (including attorneys' fees) actually and
reasonably  incurred by him or her in connection  with the defense or settlement
of such  action or suit if he or she  acted in good  faith and in a manner he or
she  reasonably  believed to be in or not opposed to the best  interests  of the
Registrant,  provided  that no  indemnification  may be made in  respect  of any
claim, issue or matter as to which such person has been adjudged to be liable to
the Registrant unless and only to the extent that the Delaware Court of Chancery
or the  court  in  which  such  action  or  suit  was  brought  determines  upon
application  that,  despite the adjudication of liability but in view of all the
circumstances  of the case,  such  person is fairly and  reasonably  entitled to
indemnity for such expenses  which the Delaware  Court of Chancery or such other
court deems proper.

         Pursuant to its by-laws,  the  Registrant has the power to purchase and
maintain a directors  and officers  liability  policy to insure its officers and
directors against certain liabilities.

         Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors,  officers or persons  controlling the
registrant  pursuant  to the  foregoing  provisions,  the  registrant  has  been
informed  that in the opinion of the  Securities  and Exchange  Commission  such
indemnification  is  against  public  policy  as  expressed  in the  Act  and is
therefore unenforceable.

Item 16.      Exhibits.

         Please see Index of Exhibits on Page 24 below.

Item 17.      Undertakings.

              A.      Undertaking Pursuant to Rule 415.

                      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) Securities Act of 1933 (the "Securities Act");

                         (ii) to reflect in the  prospectus  any facts or events
                  arising after the effective date of the 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  the  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 end 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 a 20% change in the maximum aggregate offering price
                  set forth in the  "Calculation of  Registration  Fee" table in
                  the effective Registration Statement;

                                   Page II-2

<PAGE>

                         (iii) to include any material  information with respect
                  to the plan of  distribution  not previously  disclosed in the
                  Registration   Statement  or  any  material   change  to  such
                  information in the Registration Statement;

              provided,  however,  that  paragraphs  A(l)(i) and A(l)(ii) do not
              apply if the  Registration  Statement  is on Form S-3 or Form S-8,
              and the  information  required to be included in a  post-effective
              amendment by those  paragraphs  is  contained in periodic  reports
              filed by the Registrant pursuant to Section 13 or Section 15(d) of
              the Securities  Exchange Act of 1934 (the "Exchange Act") that are
              incorporated by reference in the 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 this offering.

              B.      Undertaking Regarding Filings Incorporating Subsequent
                         Exchange Act Documents by Reference.

              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 Section 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 the 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.      Undertaking in Respect of Indemnification.

              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.

                                   Page II-3

<PAGE>


                                   SIGNATURES

         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 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,  California,  on this 5th day of January,
2000.

                                                  NEUROCRINE BIOSCIENCES, INC.
                                                    By: /s/ Paul W. Hawran
                                                    Paul W. Hawran,
                                                    Chief Financial Officer


                                POWER OF ATTORNEY

         Each person whose signature appears below constitutes and appoints Paul
W. Hawran and Gary A. Lyons, jointly and severally,  as attorneys-in-fact,  each
with the power of  substitution,  for him or her in any and all  capacities,  to
sign any amendment to this  Registration  Statement  and to file the same,  with
exhibits  thereto  and  other  documents  in  connection  therewith,   with  the
Securities and Exchange Commission, granting to said attorneys-in-fact, and each
of them, full power and authority to do and perform each and every act and thing
requisite  and  necessary to be done in  connection  therewith,  as fully to all
intents and purposes as he or she might or could do in person,  hereby ratifying
and confirming all that said  attorneys-in-fact  or any of them, or their or his
or her substitute or substitutes,  may lawfully do or cause to be done by virtue
hereof.

         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
registration  statement  has been signed below by the  following  persons in the
capacities and on the dates indicated.

Signature                    Title                                  Date

/s/ GARY A. LYONS            President, Chief Executive
- ----------------------       Officer and Director              January 19, 2000
Gary A. Lyons               (Principal Executive Officer)


/s/ PAUL W. HAWRAN           Chief Financial Officer
- ----------------------       (Principal Financial               January 19, 2000
Paul W. Hawran               and Accounting Officer)


/s/ JOSEPH A. MOLLICA        Chairman of the                    January 19, 2000
- ----------------------       Board of Directors
Joseph A. Mollica


/s/ STEPHEN A. SHERWIN       Director                           January 19, 2000
- ----------------------
Stephen A. Sherwin


/s/ RICHARD F. POPS          Director                           January 19, 2000
- ----------------------
Richard F. Pops


/s/ WYLIE W. VALE            Director                           January 19, 2000
- -------------------------
Wylie W. Vale

                                   Page II-4

<PAGE>

                                INDEX OF EXHIBITS


     Exhibit
     Number                  Description
- ------------------ -------------------------------------------------------------
    4.1            Stock Purchase  Agreement dated December 20 through 23, 1999,
                   between  Neurocrine   Biosciences,   Inc.  and  each  of  the
                   Purchasers named therin.
    5.1            Opinion of Latham & Watkins.
   23.1            Consent of Ernst & Young LLP, Independent Auditors.
   23.2            Consent of Counsel (included in Exhibit 5.1).
   24.1            Power of Attorney (included on page II-5).


                                   Page II-5
<PAGE>


                                                                     EXHIBIT 4.1


                            STOCK PURCHASE AGREEMENT


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

Ladies & Gentlemen:

         The  undersigned,   _________________________________(the  "Investor"),
hereby confirms its agreement with you as follows:

1. This Stock Purchase  Agreement (the  "Agreement")  is made as of December 20,
1999  between  Neurocrine   Biosciences,   Inc.,  a  Delaware  corporation  (the
"Company"), and the Investor.

2. The Company has  authorized  the sale and issuance of up to 3,000,000  shares
(the  "Shares") of common stock of the Company,  $0.001 par value per share (the
"Common Stock"),  subject to adjustment by the Company's Board of Directors,  to
certain investors in a private placement (the "Offering").

3. The Company and the Investor  agree that the Investor  will purchase from the
Company and the Company will issue and sell to the Investor  ___________ Shares,
for a purchase  price of $18.00 per share,  or an  aggregate  purchase  price of
$_______________,  pursuant to the Terms and  Conditions  for Purchase of Shares
attached hereto as Annex I and incorporated  herein by reference as if fully set
forth  herein.   Unless  otherwise  requested  by  the  Investor,   certificates
representing  the Shares  purchased by the Investor  will be  registered  in the
Investor's name and address as set forth below.

4. The Investor  represents  that,  except as set forth below, (a) it has had no
position, office or other material relationship within the past three years with
the  Company or its  affiliates,  (b) neither it, nor any group of which it is a
member or to which it is  related,  beneficially  owns  (including  the right to
acquire  or vote)  any  securities  of the  Company  and (c) it has no direct or
indirect affiliation or association with any NASD member.
Exceptions:

  ----------------------------------------------------------------------------
  ----------------------------------------------------------------------------.
                (if no exceptions, write "none." If left blank,
                     response will be deemed to be "none.")

         Please  confirm that the foregoing  correctly  sets forth the agreement
between us by signing in the space provided below for that purpose.

AGREED AND ACCEPTED:
NEUROCRINE BIOSCIENCES, INC.


By:      /s/ Paul W. Hawran
Title:   Senior Vice President and CFO

                                   Page II-6

<PAGE>


                             INVESTOR SIGNATURE PAGE

BIOTECH TARGET S.A.
By:                 /s/ A. Hove and  /s/HJ Graf
Title               Signing Authorities
Address:            Swiss Bank Tower, Panama 1, Republic of Panama
Date:               December 22, 1999
Purchase:           500,000 shares for $9,000,000

DEUTSCHE VERMOGENSBILDUNGSGESELLSCHAFT MBH
By:                 /s/ Daniel Eudonhat
Title               Fund Manager
Address:            Feldbergsrasse 22, 60323 Frankfurt, Germany
Date:               December 21, 1999
Purchase:           600,000 shares for $10,800,000

DEUTSCHE ASSET MANGEMENT INVESTMENTGESELLSCHAFT MBH
By:                 /s/
Title               Fund Manager
Address:            Mainzer Landstra(beta)e 16, 60325 Frankfurt, Germany
Date:               December 20, 1999
Purchase:           300,000 shares for $5,400,000

SEB LAKEMEDELSFUND
By:                 /s/ William AF Sanderberg
Title               Head of SEB Investment Management
Address:            ST 56, 10640, Stockholm, Sweeden
Date:               December 20, 1999
Purchase:           385,000 shares for $6,930,000

SEB PRIVATE BANK S.A., LUXMEBORG
By:                 /s/ J. Hellers
Title               Senior Manager
Address:            16, Boulevard Royal PO Box 487, L-2014 Luxembourg
Date:               December 23, 1999
Purchase:           65,000 shares for $1,170,000

ACTIVEST MANAGEMENT SA
By:                 /s/ S. Aeschbacher       and             /s/ A. Sierro
Title               Managing Director                       Executive Director
Address:            12, Rue Cearo, Geneva, Switzeland 1204
Date:               December 22, 1999
Purchase:           277,777 shares for $4,999,986

DWS INVESTMENT GMB
By:                 /s/ Michael Sistenich
Title               Senior Fund Manager
Address:            Gruneburgweg 113-115, Frankfurt Am Main 60323, Germany
Date:               December 22, 1999
Purchase:           200,000 shares for $3,600,000


                                   Page II-7
<PAGE>


                                     ANNEX I

                   TERMS AND CONDITIONS FOR PURCHASE OF SHARES


         1.  Authorization  and Sale of the  Shares.  Subject  to the  terms and
conditions  of this  Agreement,  the  Company has  authorized  the sale of up to
3,000,000  Shares.  The Company  reserves the right to increase or decrease this
number.

         2.       Agreement to Sell and Purchase the Shares; Subscription Date.

                  2.1 At the Closing (as defined in Section 3), the Company will
sell to the Investor,  and the Investor will purchase from the Company, upon the
terms and conditions  hereinafter  set forth,  the number of Shares set forth on
the  signature  page hereto at the  purchase  price set forth on such  signature
page.

                  2.2 The  Company  may  enter  into  this  same  form of  Stock
Purchase  Agreement  with certain other  investors (the "Other  Investors")  and
expects  to  complete  sales of  Shares  to them.  (The  Investor  and the Other
Investors are hereinafter sometimes collectively referred to as the "Investors,"
and this  Agreement  and the Stock  Purchase  Agreements  executed  by the Other
Investors   are   hereinafter   sometimes   collectively   referred  to  as  the
"Agreements.")  The Company will accept  executed  Agreements from Investors for
the purchase of Shares  commencing  upon the date on which the Company  provides
the Investors with the proposed purchase price per Share and concluding upon the
date (the "Subscription  Date") on which the Company has (i) executed Agreements
with Investors for the purchase of at least 2,327,777 Shares,  and (ii) notified
the  Investors  in  writing  that  it is no  longer  accepting  Agreements  from
Investors  for the  purchase  of  Shares.  The  Company  may not enter  into any
Agreements after the Subscription Date.

         3.  Delivery of the Shares at Closing.  The  completion of the purchase
and sale of the Shares  (the  "Closing")  shall  occur (the  "Closing  Date") on
December 22, 1999, at the offices of the Company's counsel. At the Closing,  the
Company  shall   deliver  to  the  Investor  one  or  more  stock   certificates
representing  the number of Shares set forth on the signature page hereto,  each
such  certificate  to be  registered  in the  name  of the  Investor  or,  if so
indicated on the signature page hereto,  in the name of a nominee  designated by
the Investor.

         The Company's  obligation to issue the Shares to the Investor  shall be
subject to the following  conditions,  any one or more of which may be waived by
the Company: (a) receipt by the Company of a certified or official bank check or
wire  transfer of funds in the full amount of the purchase  price for the Shares
being  purchased  hereunder  as set  forth on the  signature  page  hereto;  (b)
completion  of the  purchases  and  sales  under the  Agreements  with the Other
Investors;  and (c) the accuracy of the  representations  and warranties made by
the Investors and the  fulfillment of those  undertakings of the Investors to be
fulfilled prior to the Closing.

         The  Investor's  obligation  to purchase the Shares shall be subject to
the  following  conditions,  any one or  more  of  which  may be  waived  by the
Investor:  (a) Investors  shall have executed  Agreements for the purchase of at
least  2,327,777  Shares,  and (b) the  representations  and  warranties  of the
Company set forth herein shall be true and correct in all material respects.

         4.  Representations,  Warranties  and  Covenants  of the  Company.  The
Company hereby represents and warrants to, and covenants with, the Investor,  as
follows:

                  4.1  Organization.  The Company is duly  organized and validly
existing  in  good  standing  under  the  laws  of  the   jurisdiction   of  its
organization.  Each of the Company and its  Subsidiaries (as defined in Rule 405
under the  Securities Act of 1933, as amended (the  "Securities  Act")) has full
power and authority to own, operate and occupy its properties and to conduct its
business as presently  conducted and as described in the  confidential  offering
memorandum,  dated December 17, 1999  distributed in connection with the sale of
the Shares  (including  the documents  incorporated  by reference  therein,  the
"Placement  Memorandum")  and is  registered  or qualified to do business and in
good  standing  in each  jurisdiction  in which it owns or  leases  property  or
transacts  business  and where  the  failure  to be so  qualified  would  have a
material adverse effect upon the business,  financial  condition,  properties or
operations of the Company and its  Subsidiaries,  considered as one  enterprise,
and no  proceeding  has  been  instituted  in any such  jurisdiction,  revoking,
limiting or curtailing,  or seeking to revoke, limit or curtail,  such power and
authority or qualification.

                                   Page II-8
<PAGE>

                  4.2 Due Authorization. The Company has all requisite power and
authority to execute,  deliver and perform its obligations under the Agreements,
and the Agreements have been duly authorized and validly  executed and delivered
by the Company and constitute legal, valid and binding agreements of the Company
enforceable against the Company in accordance with their terms, except as rights
to indemnity and contribution may be limited by state or federal securities laws
or the public  policy  underlying  such laws,  except as  enforceability  may be
limited by  applicable  bankruptcy,  insolvency,  reorganization,  moratorium or
similar laws affecting  creditors' and contracting parties' rights generally and
except  as  enforceability  may be  subject  to  general  principles  of  equity
(regardless  of whether such  enforceability  is  considered  in a proceeding in
equity or at law).

                  4.3  Non-Contravention.  The  execution  and  delivery  of the
Agreements,  the issuance and sale of the Shares to be sold by the Company under
the  Agreements,  the  fulfillment  of the  terms  of  the  Agreements  and  the
consummation of the transactions contemplated thereby will not (A) conflict with
or constitute a violation of, or default (with the passage of time or otherwise)
under, (i) any material bond, debenture, note or other evidence of indebtedness,
or under any material lease, contract, indenture,  mortgage, deed of trust, loan
agreement,  joint venture or other  agreement or instrument to which the Company
or any Subsidiary is a party or by which it or any of its  Subsidiaries or their
respective   properties   are  bound,   (ii)  the  charter,   by-laws  or  other
organizational  documents  of the Company or any  Subsidiary,  or (iii) any law,
administrative  regulation,  ordinance  or  order of any  court or  governmental
agency,  arbitration  panel  or  authority  applicable  to  the  Company  or any
Subsidiary  or their  respective  properties,  or (B) result in the  creation or
imposition of any lien,  encumbrance,  claim,  security  interest or restriction
whatsoever  upon any of the material  properties or assets of the Company or any
Subsidiary  or an  acceleration  of  indebtedness  pursuant  to any  obligation,
agreement or condition  contained in any material bond,  debenture,  note or any
other evidence of  indebtedness  or any material  indenture,  mortgage,  deed of
trust  or any  other  agreement  or  instrument  to  which  the  Company  or any
Subsidiary  is a party or by which  any of them is bound or to which  any of the
property or assets of the  Company or any  Subsidiary  is  subject.  No consent,
approval,  authorization  or other order of, or  registration,  qualification or
filing with, any regulatory body,  administrative  agency, or other governmental
body in the United  States is required  for the  execution  and  delivery of the
Agreements  and the valid issuance and sale of the Shares to be sold pursuant to
the  Agreements,  other than such as have been made or obtained,  and except for
any  securities  filings  required to be made under federal or state  securities
laws.

                  4.4  Capitalization.  The  capitalization of the Company as of
September  30,  1999 is as set  forth  in the  Placement  Memorandum  (excluding
unvested  options and treasury  shares).  The Company has not issued any capital
stock  since  that date  other  than  pursuant  to (i)  employee  benefit  plans
disclosed in the Placement  Memorandum,  or (ii) outstanding warrants or options
disclosed in the  Placement  Memorandum.  The Shares to be sold  pursuant to the
Agreements have been duly authorized, and when issued and paid for in accordance
with the terms of the Agreements will be duly and validly issued, fully paid and
nonassessable.  The outstanding shares of capital stock of the Company have been
duly and validly issued and are fully paid and  nonassessable,  have been issued
in compliance with all federal and state securities laws, and were not issued in
violation  of any  preemptive  rights  or  similar  rights to  subscribe  for or
purchase  securities.  Except as set forth in or  contemplated  by the Placement
Memorandum,  there are no outstanding  rights  (including,  without  limitation,
preemptive rights),  warrants or options to acquire, or instruments  convertible
into or  exchangeable  for, any unissued shares of capital stock or other equity
interest  in  the  Company  or any  Subsidiary,  or  any  contract,  commitment,
agreement,  understanding  or  arrangement of any kind to which the Company is a
party or of which the Company has knowledge and relating to the issuance or sale
of any capital stock of the Company or any Subsidiary,  any such  convertible or
exchangeable  securities  or any  such  rights,  warrants  or  options.  Without
limiting the  foregoing,  no preemptive  right,  co-sale  right,  right of first
refusal,  registration  right, or other similar right exists with respect to the
Shares or the issuance and sale thereof. No further approval or authorization of
any stockholder, the Board of Directors of the Company or others is required for
the issuance and sale of the Shares. The Company owns the entire equity interest
in each of its  Subsidiaries,  free and  clear  of any  pledge,  lien,  security
interest,  encumbrance,  claim or equitable interest, other than as described in
the Placement Memorandum. Except as disclosed in the Placement Memorandum, there
are no stockholders  agreements,  voting agreements or other similar  agreements
with  respect  to the  Common  Stock to which the  Company is a party or, to the
knowledge of the Company, between or among any of the Company's stockholders.

                  4.5  Legal   Proceedings.   There  is  no  material  legal  or
governmental proceeding pending or, to the knowledge of the Company,  threatened
to which  the  Company  or any  Subsidiary  is or may be a party or of which the
business or property of the  Company or any  Subsidiary  is subject  that is not
disclosed in the Placement Memorandum.

                                   Page II-9
<PAGE>

                  4.6 No  Violations.  Neither the Company nor any Subsidiary is
in violation of its charter,  bylaws, or other  organizational  document,  or in
violation of any law, administrative regulation, ordinance or order of any court
or governmental agency, arbitration panel or authority applicable to the Company
or any Subsidiary,  which violation,  individually or in the aggregate, would be
reasonably likely to have a material adverse effect on the business or financial
condition of the Company and its Subsidiaries,  considered as one enterprise, or
is in default (and there exists no condition which,  with the passage of time or
otherwise,   would  constitute  a  default)  in  any  material  respect  in  the
performance of any bond,  debenture,  note or any other evidence of indebtedness
in any indenture,  mortgage,  deed of trust or any other  material  agreement or
instrument  to which the  Company or any  Subsidiary  is a party or by which the
Company or any  Subsidiary is bound or by which the properties of the Company or
any  Subsidiary are bound,  which would be reasonably  likely to have a material
adverse  effect upon the business or financial  condition of the Company and its
Subsidiaries, considered as one enterprise.

                  4.7  Governmental  Permits,  Etc.  With the  exception  of the
matters which are dealt with  separately in Section 4.1,  4.12,  4.13, and 4.14,
each of the Company and its Subsidiaries has all necessary franchises, licenses,
certificates and other authorizations from any foreign,  federal, state or local
government  or  governmental  agency,  department,  or body  that are  currently
necessary for the operation of the business of the Company and its  Subsidiaries
as currently conducted and as described in the Placement Memorandum except where
the failure to  currently  possess  could not  reasonably  be expected to have a
material adverse effect.

                  4.8 Intellectual  Property.  Subject to the matters  discussed
under "Risk Factors" in the Placement Memorandum (i) each of the Company and its
Subsidiaries  owns or possesses  sufficient  rights to use all material patents,
patent rights,  trademarks,  copyrights,  licenses,  inventions,  trade secrets,
trade names and know-how  (collectively,  "Intellectual  Property") described or
referred to in the Placement Memorandum as owned by it or that are necessary for
the conduct of its  business as now  conducted or as proposed to be conducted as
described in the Placement  Memorandum except where the failure to currently own
or possess would not have a material adverse effect on the condition  (financial
or  otherwise),  earnings,  operations,  business or business  prospects  of the
Company and its  Subsidiaries  considered  as one  enterprise,  (ii) neither the
Company  nor any of its  Subsidiaries  has  received  any  notice of, or has any
knowledge of, any  infringement of asserted rights of a third party with respect
to any Intellectual Property that, individually or in the aggregate,  would have
a material adverse effect on the financial  condition or business of the Company
and its Subsidiaries  considered as one enterprise and (iii) neither the Company
nor any of its  Subsidiaries  has  received  any notice of any  infringement  of
rights  of a  third  party  with  respect  to any  Intellectual  Property  that,
individually or in the aggregate,  would have a material adverse effect upon the
business or financial condition of the Company and its Subsidiaries,  considered
as one enterprise.

                  4.9  Financial  Statements.  The  financial  statements of the
Company and the related  notes  contained in the  Placement  Memorandum  present
fairly,  in  accordance  with  generally  accepted  accounting  principles,  the
financial  position  of  the  Company  and  its  Subsidiaries  as of  the  dates
indicated,  and the  results of its  operations  and cash flows for the  periods
therein specified.  Such financial statements (including the related notes) have
been  prepared in  accordance  with  generally  accepted  accounting  principles
applied on a consistent basis throughout the periods therein  specified,  except
as  disclosed  in the  Placement  Memorandum.  The other  financial  information
contained in the Placement  Memorandum  has been prepared on a basis  consistent
with the financial statements of the Company.

                  4.10 No Material  Adverse  Change.  Except as disclosed in the
Placement  Memorandum,  since  September  30,  1999,  there has not been (i) any
material  adverse  change in the financial  condition or earnings of the Company
and its  Subsidiaries  considered as one enterprise nor has any material adverse
event  occurred to the Company or its  Subsidiaries,  (ii) any material  adverse
event affecting the Company, (iii) any obligation, direct or contingent, that is
material to the  Company  and its  Subsidiaries  considered  as one  enterprise,
incurred by the Company,  except obligations  incurred in the ordinary course of
business,  (iv) any dividend or distribution of any kind declared,  paid or made
on the capital stock of the Company or any of its Subsidiaries,  or (v) any loss
or damage  (whether or not insured) to the  physical  property of the Company or
any of its  Subsidiaries  which has been sustained which has a material  adverse
effect on the condition (financial or otherwise), earnings, operations, business
or business  prospects  of the Company and its  Subsidiaries  considered  as one
enterprise.

                  4.11  Disclosure.  The information  contained in the Placement
Memorandum as of the date hereof and as of the Closing  Date,  did not and shall
not contain an untrue  statement of a material  fact or omit to state a material
fact required to be stated therein or necessary to make the statements  therein,
in light of the circumstances under which they were made, not misleading.

                                   Page II-10
<PAGE>

                  4.12  NASDAQ   Compliance.   The  Company's  Common  Stock  is
registered  pursuant to Section  12(g) of the  Exchange Act and is listed on The
Nasdaq Stock Market,  Inc. National Market (the "Nasdaq National  Market"),  and
the  Company has taken no action  designed  to, or likely to have the effect of,
terminating  the  registration  of the Common  Stock under the  Exchange  Act or
de-listing the Common Stock from the Nasdaq National Market, nor has the Company
received any  notification  that the  Securities  and Exchange  Commission  (the
"SEC") or the National  Association  of  Securities  Dealers,  Inc.  ("NASD") is
contemplating terminating such registration or listing.

                  4.13  Reporting  Status.  The  Company  has  filed in a timely
manner all documents  that the Company was required to file under the Securities
Exchange  Act of 1934,  as amended  (the  "Exchange  Act")  during the 12 months
preceding the date of this Agreement.  The following  documents  complied in all
material  respects with the SEC's  requirements  as of their  respective  filing
dates,  and the  information  contained  therein as of the date  thereof did not
contain an untrue  statement of a material fact or omit to state a material fact
required to be stated  therein or  necessary to make the  statements  therein in
light of the circumstances under where they were made not misleading:

                            (a)    The Company's Annual Report on Form 10-K for
                             the year ended December 31, 1998 (the "10-K"); and

                            (b)  All  other  documents,  if  any,  filed  by the
                            Company  with  the  SEC  since   December  31,  1998
                            pursuant  to  the  reporting   requirements  of  the
                            Exchange Act.

                  4.14 Listing.  The Company shall comply with all  requirements
of the National  Association  of  Securities  Dealers,  Inc. with respect to the
issuance of the Shares and the listing thereof on the Nasdaq National Market.

                  4.15 Year 2000  Compliance.  The  information set forth in the
Placement  Memorandum with respect to the Company's  efforts regarding Year 2000
matters (i) conforms in all material respects to the guidelines set forth in SEC
Release No.  33-7558 and (ii)  accurately  describes the status of the Company's
efforts  regarding  Year 2000  matters.  To the Company's  knowledge,  the costs
associated  with  ensuring  that the Company is Year 2000  compliant  will not a
material  adverse  effect on the  operations  or business of the Company and its
Subsidiaries considered as one enterprise.

                  4.16 No Manipulation  of Stock.  The Company has not taken and
will not, in violation of applicable  law, take, any action  designed to or that
might reasonably be expected to cause or result in stabilization or manipulation
of the price of the Common Stock to facilitate the sale or resale of the Shares.

         5.       Representations, Warranties and Covenants of the Investor.

                  5.1 The Investor  represents  and  warrants to, and  covenants
with, the Company that: (i) the Investor is an "accredited  investor" as defined
in Regulation D under the Securities Act and the Investor is also knowledgeable,
sophisticated and experienced in making, and is qualified to make decisions with
respect to  investments  in shares  presenting an investment  decision like that
involved in the  purchase of the Shares,  including  investments  in  securities
issued  by  the  Company  and  investments  in  comparable  companies,  and  has
requested,  received, reviewed and considered all information it deemed relevant
in making an  informed  decision to purchase  the Shares;  (ii) the  Investor is
acquiring  the number of Shares set forth on the  signature  page  hereto in the
ordinary  course of its business and for its own account for investment only and
with no present  intention of distributing any of such Shares or any arrangement
or  understanding  with any other  persons  regarding the  distribution  of such
Shares;  (iii) the  Investor  will not,  directly or  indirectly,  offer,  sell,
pledge, transfer or otherwise dispose of (or solicit any offers to buy, purchase
or otherwise acquire or take a pledge of) any of the Shares except in compliance
with the Securities  Act,  applicable  state  securities laws and the respective
rules and regulations promulgated thereunder; (iv) the Investor has answered all
questions  on  the  signature   page  hereto  for  use  in  preparation  of  the
Registration  Statement  and the answers  thereto are true and correct as of the
date  hereof  and will be true  and  correct  as of the  Closing  Date;  (v) the
Investor  will  notify  the  Company  immediately  of any  change in any of such
information  until such time as the Investor has sold all of its Shares or until
the Company is no longer required to keep the Registration  Statement effective;
and (vi) the  Investor  has, in  connection  with its  decision to purchase  the
number of Shares set forth on the  signature  page hereto,  relied only upon the
Placement  Memorandum  and the  representations  and  warranties  of the Company
contained  herein.  Investor  understands that its acquisition of the Shares has
not been  registered  under the Securities Act or registered or qualified  under
any state  securities law in reliance on specific  exemptions  therefrom,  which
exemptions  may depend  upon,  among other  things,  the bona fide nature of the
Investor's  investment  intent as expressed  herein.  Investor has  completed or
caused to be completed and  delivered to the Company the Investor  Questionnaire
attached as Exhibit B to the Placement  Memorandum,  which questionnaire is true
and correct in all material respects.

                                   Page II-11
<PAGE>


                  5.2 The Investor  acknowledges,  represents and agrees that no
action has been or will be taken in any  jurisdiction  outside the United States
by the Company that would  permit an offering of the Shares,  or  possession  or
distribution  of offering  materials in connection with the issue of the Shares,
in any  jurisdiction  outside the United States where action for that purpose is
required.  Each  Investor  outside  the  United  States  will  comply  with  all
applicable  laws  and  regulations  in each  foreign  jurisdiction  in  which it
purchases,  offers,  sells  or  delivers  Shares  or has in  its  possession  or
distributes any offering material, in all cases at its own expense.

                  5.3 The Investor hereby covenants with the Company not to make
any sale of the Shares without  complying with the provisions of this Agreement,
including  Section 7.2 hereof,  and without  effectively  causing the prospectus
delivery requirement under the Securities Act to be satisfied,  and the Investor
acknowledges that the certificates  evidencing the Shares will be imprinted with
a legend that  prohibits  their  transfer  except in accordance  therewith.  The
Investor  acknowledges  that there may  occasionally  be times when the  Company
determines that it must suspend the use of the Prospectus  forming a part of the
Registration Statement, as set forth in Section 7.2(c).

                  5.4 The  Investor  further  represents  and  warrants  to, and
covenants  with,  the  Company  that (i) the  Investor  has full  right,  power,
authority  and  capacity  to enter into this  Agreement  and to  consummate  the
transactions contemplated hereby and has taken all necessary action to authorize
the  execution,  delivery  and  performance  of this  Agreement,  and (ii)  this
Agreement constitutes a valid and binding obligation of the Investor enforceable
against the Investor in accordance with its terms,  except as enforceability may
be limited by applicable bankruptcy, insolvency,  reorganization,  moratorium or
similar laws affecting  creditors' and contracting parties' rights generally and
except  as  enforceability  may be  subject  to  general  principles  of  equity
(regardless  of whether such  enforceability  is  considered  in a proceeding in
equity or at law) and except as the indemnification  agreements of the Investors
herein may be legally unenforceable.

                  5.5  Investor  will  not  use  any  of the  restricted  Shares
acquired  pursuant to this  Agreement to cover any short  position in the Common
Stock of the Company if doing so would be in violation of applicable  securities
laws.
                  5.6 The Investor  understands  that  nothing in the  Placement
Memorandum,  this Agreement or any other materials  presented to the Investor in
connection with the purchase and sale of the Shares  constitutes  legal,  tax or
investment  advice.  The Investor has consulted  such legal,  tax and investment
advisors as it, in its sole  discretion,  has deemed necessary or appropriate in
connection with its purchase of Shares.

         6.   Survival   of   Representations,    Warranties   and   Agreements.
Notwithstanding  any  investigation  made by any  party to this  Agreement,  all
covenants,  agreements,  representations  and warranties made by the Company and
the Investor herein shall survive the execution of this Agreement,  the delivery
to the Investor of the Shares being purchased and the payment therefor.

         7. Registration of the Shares; Compliance with the Securities Act.

               7.1  Registration Procedures and Expenses. The Company shall:

               (a)  subject  to  receipt  of  necessary   information  from  the
                    Investors,  use its  reasonable  efforts to prepare and file
                    with the SEC,  within 10 days  after  the  Closing  Date,  a
                    registration  statement  (the  "Registration  Statement") to
                    enable the resale of the Shares by the  Investors  from time
                    to time through the automated quotation system of the Nasdaq
                    National Market or in privately-negotiated transactions;

               (b)  use its reasonable efforts,  subject to receipt of necessary
                    information  from the Investors,  to cause the  Registration
                    Statement  to  become  effective  within  90 days  after the
                    Registration Statement is filed by the Company;

               (c)  use its reasonable  efforts to prepare and file with the SEC
                    such   amendments  and   supplements  to  the   Registration
                    Statement and the Prospectus used in connection therewith as
                    may be necessary to keep the Registration  Statement current
                    and  effective for a period not  exceeding,  with respect to
                    each Investor's Shares purchased  hereunder,  the earlier of
                    (i) the second  anniversary  of the Closing  Date,  (ii) the
                    date on which the  Investor may sell all Shares then held by
                    the Investor without  restriction by the volume  limitations
                    of Rule 144(e) of the Securities  Act, or (iii) such time as
                    all Shares  purchased by such Investor in this Offering have
                    been sold pursuant to a registration statement.

                                   Page II-12
<PAGE>


               (d)  furnish  to  the   Investor   with  respect  to  the  Shares
                    registered under the  Registration  Statement such number of
                    copies  of  the  Registration  Statement,  Prospectuses  and
                    Preliminary Prospectuses in conformity with the requirements
                    of the  Securities  Act  and  such  other  documents  as the
                    Investor may reasonably  request, in order to facilitate the
                    public sale or other disposition of all or any of the Shares
                    by the Investor,  provided,  however, that the obligation of
                    the Company to deliver copies of Prospectuses or Preliminary
                    Prospectuses to the Investor shall be subject to the receipt
                    by the Company of  reasonable  assurances  from the Investor
                    that the Investor will comply with the applicable provisions
                    of the Securities  Act and of such other  securities or blue
                    sky laws as may be applicable in connection  with any use of
                    such Prospectuses or Preliminary Prospectuses;

               (e)  file  documents  required of the Company for normal blue sky
                    clearance in states  specified  in writing by the  Investor,
                    provided, however, that the Company shall not be required to
                    qualify to do  business  or consent to service of process in
                    any  jurisdiction in which it is not now so qualified or has
                    not so consented;

               (f)  bear all  expenses  in  connection  with the  procedures  in
                    paragraph  (a)  through  (e) of  this  Section  7.1  and the
                    registration  of the  Shares  pursuant  to the  Registration
                    Statement; and

               (g)  advise the Investors, promptly after it shall receive notice
                    or obtain knowledge of the issuance of any stop order by the
                    SEC  delaying  or  suspending  the   effectiveness   of  the
                    Registration Statement or of the initiation or threat of any
                    proceeding  for that  purpose;  and it will promptly use its
                    reasonable efforts to prevent the issuance of any stop order
                    or to obtain its withdrawal at the earliest  possible moment
                    if such stop order should be issued.

         The  Company   understands   that  the  Investor   disclaims  being  an
underwriter,  but the Investor  being deemed an underwriter by the SEC shall not
relieve the Company of any obligations it has hereunder,  provided, however that
if the Company receives notification from the SEC that the Investor is deemed an
underwriter,  then the  period by which the  Company is  obligated  to submit an
acceleration request to the SEC shall be extended to the earlier of (i) the 90th
day after such SEC  notification,  or (ii) 120 days after the initial  filing of
the Registration Statement with the SEC.

               7.2  Transfer of Shares After Registration; Suspension.

               (a)  The Investor  agrees that it will not effect any Disposition
                    of the Shares or its right to purchase the Shares that would
                    constitute a sale within the meaning of the  Securities  Act
                    except  as  contemplated  in  the   Registration   Statement
                    referred to in Section 7.1 and as described  below, and that
                    it will  promptly  notify the  Company of any changes in the
                    information   set  forth  in  the   Registration   Statement
                    regarding the Investor or its plan of distribution.

               (b)  Except in the event that  paragraph (c) below  applies,  the
                    Company  shall  (i) if  deemed  necessary  by  the  Company,
                    prepare   and  file  from  time  to  time  with  the  SEC  a
                    post-effective  amendment to the Registration Statement or a
                    supplement  to the related  Prospectus  or a  supplement  or
                    amendment to any document  incorporated therein by reference
                    or  file  any   other   required   document   so  that  such
                    Registration  Statement will not contain an untrue statement
                    of a material fact or omit to state a material fact required
                    to be stated  therein or  necessary  to make the  statements
                    therein not misleading, and so that, as thereafter delivered
                    to  purchasers  of the Shares  being sold  thereunder,  such
                    Prospectus  will  not  contain  an  untrue  statement  of  a
                    material  fact or omit to state a material  fact required to
                    be  stated  therein  or  necessary  to make  the  statements
                    therein, in light of the circumstances under which they were
                    made, not  misleading;  (ii) provide the Investor  copies of
                    any documents filed pursuant to Section 7.2(b)(i); and (iii)
                    inform each  Investor that the Company has complied with its
                    obligations  in Section  7.2(b)(i)  (or that, if the Company
                    has filed a  post-effective  amendment  to the  Registration
                    Statement  which has not yet been  declared  effective,  the
                    Company will notify the  Investor to that  effect,  will use
                    its reasonable  efforts to secure the  effectiveness of such
                    post-effective  amendment  as promptly as possible  and will
                    promptly notify the Investor  pursuant to Section  7.2(b)(i)
                    hereof when the amendment has become effective).

               (c)  Subject  to  paragraph  (d)  below,  in the event (i) of any
                    request   by  the  SEC  or  any  other   federal   or  state
                    governmental authority during the period of effectiveness of
                    the Registration  Statement for amendments or supplements to
                    a  Registration  Statement  or  related  Prospectus  or  for

                                   Page II-13
<PAGE>

                    additional  information;  (ii) of the issuance by the SEC or
                    any other  federal or state  governmental  authority  of any
                    stop order  suspending the  effectiveness  of a Registration
                    Statement  or the  initiation  of any  proceedings  for that
                    purpose;  (iii)  of  the  receipt  by  the  Company  of  any
                    notification   with  respect  to  the   suspension   of  the
                    qualification or exemption from  qualification of any of the
                    Shares for sale in any  jurisdiction  or the  initiation  or
                    threatening of any  proceeding for such purpose;  or (iv) of
                    any  event or  circumstance  which,  upon the  advice of its
                    counsel,  necessitates  the  making  of any  changes  in the
                    Registration  Statement  or  Prospectus,   or  any  document
                    incorporated  or  deemed  to  be  incorporated   therein  by
                    reference,   so  that,  in  the  case  of  the  Registration
                    Statement,  it will not  contain any untrue  statement  of a
                    material  fact or any  omission  to  state a  material  fact
                    required  to be  stated  therein  or  necessary  to make the
                    statements  therein not misleading,  and that in the case of
                    the Prospectus,  it will not contain any untrue statement of
                    a material  fact or any  omission  to state a material  fact
                    required  to be  stated  therein  or  necessary  to make the
                    statements  therein, in the light of the circumstances under
                    which they were made, not misleading; then the Company shall
                    deliver  a  certificate  in  writing  to the  Investor  (the
                    "Suspension  Notice")  to the effect of the  foregoing  and,
                    upon receipt of such  Suspension  Notice,  the Investor will
                    refrain from selling any Shares pursuant to the Registration
                    Statement (a "Suspension")  until the Investor's  receipt of
                    copies of a supplemented or amended Prospectus  prepared and
                    filed by the  Company,  or until it is advised in writing by
                    the Company that the current Prospectus may be used, and has
                    received  copies of any additional or  supplemental  filings
                    that are incorporated or deemed incorporated by reference in
                    any such  Prospectus.  In the event of any  Suspension,  the
                    Company will use its reasonable  efforts to cause the use of
                    the  Prospectus  so  suspended  to be  resumed  as  soon  as
                    reasonably  practicable  within 20  business  days after the
                    delivery of a Suspension Notice to the Investor. In addition
                    to and  without  limiting  any  other  remedies  (including,
                    without  limitation,  at law or at equity)  available to the
                    Investor,   the  Investor  shall  be  entitled  to  specific
                    performance  in the event that the  Company  fails to comply
                    with the provisions of this Section 7.2(c).

               (d)  Notwithstanding  the  foregoing  paragraphs  of this Section
                    7.2,  the  Investor  shall not be  prohibited  from  selling
                    Shares  under  the  Registration  Statement  as a result  of
                    Suspensions on more than three occasions of not more than 30
                    days each in any twelve month  period,  unless,  in the good
                    faith  judgment of the Company's  Board of  Directors,  upon
                    advice of counsel, the sale of Shares under the Registration
                    Statement  in reliance  on this  paragraph  7.2(d)  would be
                    reasonably likely to cause a violation of the Securities Act
                    or the Exchange Act and result in potential liability to the
                    Company.

               (e)  Provided  that  a  Suspension  is not  then  in  effect  the
                    Investor may sell Shares under the  Registration  Statement,
                    provided   that  it  arranges  for  delivery  of  a  current
                    Prospectus to the transferee of such Shares. Upon receipt of
                    a request  therefor,  the  Company  has agreed to provide an
                    adequate number of current  Prospectuses to the Investor and
                    to  supply  copies  to  any  other  parties  requiring  such
                    Prospectuses.

               (f)  In the event of a sale of Shares by the Investor pursuant to
                    the Registration  Statement,  the Investor must also deliver
                    to the Company's transfer agent, with a copy to the Company,
                    a Certificate of Subsequent Sale  substantially  in the form
                    attached  hereto as  Exhibit  A, so that the  Shares  may be
                    properly transferred.

               7.3  Indemnification. For the purpose of this Section 7.3:

                    (i)  the  term  "Selling   Stockholder"  shall  include  the
                         Investor and any affiliate of such Investor;

                    (ii) the term  "Registration  Statement"  shall  include any
                         final  Prospectus,  exhibit,  supplement  or  amendment
                         included in or relating to the  Registration  Statement
                         referred to in Section 7.1; and

                    (iii)the term "untrue  statement"  shall  include any untrue
                         statement or alleged untrue statement,  or any omission
                         or  alleged  omission  to  state  in  the  Registration
                         Statement a material fact required to be stated therein
                         or necessary  to make the  statements  therein,  in the
                         light of the circumstances  under which they were made,
                         not misleading.

               (a)  The  Company  agrees to  indemnify  and hold  harmless  each
                    Selling  Stockholder  from and against  any losses,  claims,
                    damages or liabilities to which such Selling Stockholder may
                    become  subject  (under  the  Securities  Act or  otherwise)
                    insofar as such losses,  claims,  damages or liabilities (or
                    actions or proceedings in respect  thereof) arise out of, or
                    are based upon (i) any untrue  statement of a material  fact
                    contained in the Registration Statement, or (ii) any failure
                    by the  Company to fulfill any  undertaking  included in the
                    Registration Statement,  and the Company will reimburse such
                    Selling  Stockholder  for  any  reasonable  legal  or  other
                    expenses reasonably incurred in investigating,  defending or
                    preparing to defend any such action, proceeding or claim, or
                    preparing  to defend any such action,  proceeding  or claim,
                    provided,  however,  that the Company shall not be liable in


                                   Page II-14
<PAGE>

                    any such case to the extent that such loss, claim, damage or
                    liability  arises  out  of,  or is  based  upon,  an  untrue
                    statement  made in such  Registration  Statement in reliance
                    upon and in conformity with written information furnished to
                    the  Company  by or on  behalf of such  Selling  Stockholder
                    specifically  for  use in  preparation  of the  Registration
                    Statement  or the  failure of such  Selling  Stockholder  to
                    comply  with  its  covenants  and  agreements  contained  in
                    Section  7.2  hereof  respecting  sale of the  Shares or any
                    statement or omission in any Prospectus that is corrected in
                    any subsequent Prospectus that was delivered to the Investor
                    prior to the pertinent sale or sales by the Investor.

               (b)  The  Investor  agrees to  indemnify  and hold  harmless  the
                    Company (and each  person,  if any, who controls the Company
                    within the meaning of Section 15 of the Securities Act, each
                    officer of the Company who signs the Registration  Statement
                    and each  director  of the  Company)  from and  against  any
                    losses,  claims, damages or liabilities to which the Company
                    (or any such officer,  director or  controlling  person) may
                    become  subject  (under the  Securities  Act or  otherwise),
                    insofar as such losses,  claims,  damages or liabilities (or
                    actions or proceedings in respect  thereof) arise out of, or
                    are based upon, (i) any failure to comply with the covenants
                    and  agreements  contained in Section 7.2 hereof  respecting
                    sale  of the  Shares,  or (ii)  any  untrue  statement  of a
                    material  fact  contained in the  Registration  Statement if
                    such  untrue  statement  was  made in  reliance  upon and in
                    conformity  with  written  information  furnished  by  or on
                    behalf of the Investor  specifically  for use in preparation
                    of  the  Registration  Statement,   and  the  Investor  will
                    reimburse  the  Company  (or  such   officer,   director  or
                    controlling  person),  as the case may be,  for any legal or
                    other  expenses   reasonably   incurred  in   investigating,
                    defending or preparing to defend any such action, proceeding
                    or  claim;   provided  that  the  Investor's  obligation  to
                    indemnify  the Company shall be limited to to the net amount
                    received by the Investor from the sale of the Shares..

               (c)  Promptly after receipt by any indemnified person of a notice
                    of a claim or the  beginning  of any  action in  respect  of
                    which  indemnity  is to be sought  against  an  indemnifying
                    person pursuant to this Section 7.3, such indemnified person
                    shall  notify  the  indemnifying  person in  writing of such
                    claim  or of  the  commencement  of  such  action,  but  the
                    omission  to so  notify  the  indemnifying  party  will  not
                    relieve  it from  any  liability  which  it may  have to any
                    indemnified  party  under this  Section  7.3  (except to the
                    extent that such omission  materially and adversely  affects
                    the  indemnifying  party's ability to defend such action) or
                    from any  liability  otherwise  than under this Section 7.3.
                    Subject to the provisions  hereinafter  stated,  in case any
                    such action shall be brought against an indemnified  person,
                    the  indemnifying  person  shall be entitled to  participate
                    therein,  and,  to the extent that it shall elect by written
                    notice  delivered to the  indemnified  party  promptly after
                    receiving the aforesaid notice from such indemnified  party,
                    shall be  entitled  to  assume  the  defense  thereof,  with
                    counsel reasonably  satisfactory to such indemnified person.
                    After   notice   from  the   indemnifying   person  to  such
                    indemnified  person of its  election  to assume the  defense
                    thereof,  such  indemnifying  person  shall not be liable to
                    such indemnified person for any legal expenses  subsequently
                    incurred by such  indemnified  person in connection with the
                    defense thereof, provided,  however, that if there exists or
                    shall  exist a  conflict  of  interest  that  would  make it
                    inappropriate,  in the opinion of counsel to the indemnified
                    person,   for  the  same  counsel  to  represent   both  the
                    indemnified  person  and  such  indemnifying  person  or any
                    affiliate or associate thereof, the indemnified person shall
                    be entitled to retain its own counsel at the expense of such
                    indemnifying person; provided, however, that no indemnifying
                    person  shall be  responsible  for the fees and  expenses of
                    more than one separate  counsel  (together with  appropriate
                    local  counsel)  for all  indemnified  parties.  In no event
                    shall any  indemnifying  person be liable in  respect of any
                    amounts  paid  in   settlement  of  any  action  unless  the
                    indemnifying  person  shall have  approved the terms of such
                    settlement;   provided   that  such  consent  shall  not  be
                    unreasonably withheld. No indemnifying person shall, without
                    the prior written consent of the indemnified person,  effect
                    any  settlement of any pending or  threatened  proceeding in
                    respect  of which any  indemnified  person is or could  have
                    been a party and  indemnification  could  have  been  sought
                    hereunder by such indemnified person, unless such settlement
                    includes an unconditional release of such indemnified person
                    from all liability on claims that are the subject  matter of
                    such proceeding.

               (d)  If the  indemnification  provided for in this Section 7.3 is
                    unavailable   to  or   insufficient   to  hold  harmless  an
                    indemnified  party  under  subsection  (a) or (b)  above  in
                    respect of any losses,  claims,  damages or liabilities  (or
                    actions or  proceedings  in  respect  thereof)  referred  to
                    therein,  then each  indemnifying  party shall contribute to
                    the amount  paid or payable by such  indemnified  party as a
                    result of such losses,  claims,  damages or liabilities  (or
                    actions  in  respect  thereof)  in  such  proportion  as  is
                    appropriate  to reflect the relative fault of the Company on
                    the one hand and the  Investors  on the other in  connection
                    with the  statements  or  omissions or other  matters  which
                    resulted in such losses,  claims, damages or liabilities (or
                    actions in respect  thereof),  as well as any other relevant
                    equitable  considerations.   The  relative  fault  shall  be
                    determined by reference to, among other things,  in the case
                    of an untrue statement, whether the untrue statement relates
                    to information supplied by the Company on the one hand or an
                    Investor  on the other  and the  parties'  relative  intent,
                    knowledge,  access to information and opportunity to correct
                    or  prevent  such  untrue  statement.  The  Company  and the
                    Investors  agree that it would not be just and  equitable if

                                   Page II-15
<PAGE>

                    contribution pursuant to this subsection (d) were determined
                    by pro rata  allocation  (even if the Investors were treated
                    as one entity for such  purpose)  or by any other  method of
                    allocation  which does not take into  account the  equitable
                    considerations referred to above in this subsection (d). The
                    amount paid or payable by an  indemnified  party as a result
                    of the losses, claims, damages or liabilities (or actions in
                    respect  thereof)  referred to above in this  subsection (d)
                    shall be  deemed  to  include  any  legal or other  expenses
                    reasonably  incurred by such indemnified party in connection
                    with  investigating  or defending  any such action or claim.
                    Notwithstanding  the provisions of this  subsection  (d), no
                    Investor  shall be  required  to  contribute  any  amount in
                    excess of the amount by which the net amount received by the
                    Investor  from the sale of the  Shares  to which  such  loss
                    relates  exceeds  the  amount  of  any  damages  which  such
                    Investor  has  otherwise  been  required to pay by reason of
                    such  untrue  statement.  No  person  guilty  of  fraudulent
                    misrepresentation  (within the  meaning of Section  11(f) of
                    the Securities Act) shall be entitled to  contribution  from
                    any   person   who  was  not   guilty  of  such   fraudulent
                    misrepresentation.   The  Investors'   obligations  in  this
                    subsection to contribute  are several in proportion to their
                    sales of Shares to which such loss relates and not joint.

               (e)  The parties to this Agreement  hereby  acknowledge that they
                    are  sophisticated  business persons who were represented by
                    counsel  during the  negotiations  regarding the  provisions
                    hereof including, without limitation, the provisions of this
                    Section  7.3,  and  are  fully   informed   regarding   said
                    provisions.  They further acknowledge that the provisions of
                    this  Section 7.3 fairly  allocate the risks in light of the
                    ability of the  parties to  investigate  the Company and its
                    business in order to assure that adequate disclosure is made
                    in the Registration Statement as required by the Act and the
                    Exchange  Act. The parties are advised that federal or state
                    public  policy  as  interpreted  by the  courts  in  certain
                    jurisdictions  may be contrary to certain of the  provisions
                    of this Section 7.3, and the parties hereto hereby expressly
                    waive and  relinquish  any right or ability  to assert  such
                    public policy as a defense to a claim under this Section 7.3
                    and further agree not to attempt to assert any such defense.

                  7.4 Termination of Conditions and Obligations.  The conditions
precedent imposed by Section 5 or this Section 7 upon the transferability of the
Shares shall cease and terminate as to any particular  number of the Shares when
such Shares shall have been effectively  registered under the Securities Act and
sold or  otherwise  disposed  of in  accordance  with  the  intended  method  of
disposition set forth in the Registration  Statement  covering such Shares or at
such time as an opinion of counsel  satisfactory  to the Company shall have been
rendered to the effect that such conditions are not necessary in order to comply
with the Securities Act.

                  7.5  Information  Available.   So  long  as  the  Registration
Statement is effective covering the resale of Shares owned by the Investor,  the
Company will furnish to the Investor:

               (a)  as soon as  practicable  after it is available,  one copy of
                    (i) its Annual Report to  Stockholders  (which Annual Report
                    shall  contain  financial  statements  audited in accordance
                    with generally accepted accounting  principles by a national
                    firm of  certified  public  accountants),  (ii)  its  Annual
                    Report on Form 10-K and (iii) its Quarterly  Reports on Form
                    10-Q (the foregoing, in each case, excluding exhibits);

               (b)  upon the request of the Investor,  all exhibits  excluded by
                    the parenthetical to subparagraph (a) of this Section 7.5 as
                    filed  with the SEC and all other  information  that is made
                    available to shareholders; and

               (c)  upon the  reasonable  request of the  Investor,  an adequate
                    number of copies of the  Prospectuses to supply to any other
                    party requiring such Prospectuses; and the Company, upon the
                    reasonable  request  of the  Investor,  will  meet  with the
                    Investor  or  a  representative  thereof  at  the  Company's
                    headquarters  to  discuss  all   information   relevant  for
                    disclosure in the Registration Statement covering the Shares
                    and will otherwise cooperate with any Investor conducting an
                    investigation  for the purpose of  reducing  or  eliminating
                    such  Investor's  exposure to liability under the Securities
                    Act,  including the reasonable  production of information at
                    the Company's headquarters; provided, that the Company shall
                    not be required to disclose any confidential  information to
                    or meet at its  headquarters  with any  Investor  until  and
                    unless   the   Investor    shall   have   entered   into   a
                    confidentiality  agreement in form and substance  reasonably
                    satisfactory  to the Company  with the Company  with respect
                    thereto.

         8. Notices.  All notices,  requests,  consents and other communications
hereunder  shall be in writing,  shall be mailed (A) if within  domestic  United
States by first-class  registered or certified airmail, or nationally recognized
overnight express courier, postage prepaid, or by facsimile, or (B) if delivered
from outside the United States,  by International  Federal Express or facsimile,
and  shall be  deemed  given  (i) if  delivered  by  first-class  registered  or
certified mail domestic,  three business days after so mailed, (ii) if delivered
by nationally  recognized  overnight carrier,  one business day after so mailed,

                                   Page II-16
<PAGE>

(iii) if delivered by International  Federal Express, two business days after so
mailed,  (iv) if delivered by facsimile,  upon electric  confirmation of receipt
and shall be delivered as addressed as follows:

                  (a)       if to the Company, to:

                                    Neurocrine Biosciences, Inc.
                                    10555 Science Center Drive
                                    San Diego, CA  92121
                                    Attn:  General Counsel
                                    Phone: (619) 658-7670
                                    Telecopy:  (619) 658-7602

                  (b)       with a copy to:

                                    Latham & Watkins
                                    633 West Fifth Street, Suite 4000
                                    Los Angeles, CA  90071
                                    Attn:  John M. Newell, Esq.
                                    Phone: (213) 485-1234
                                    Telecopy:  (213) 891-8763

                  (c)      if to the  Investor,  at its address on the signature
                           page hereto, or at such other address or addresses as
                           may have been furnished to the Company in writing.

         9.  Changes.  This  Agreement  may not be  modified  or amended  except
pursuant to an instrument in writing signed by the Company and the Investor.

         10.  Headings.  The headings of the various  sections of this Agreement
have been inserted for  convenience of reference only and shall not be deemed to
be part of this Agreement.

         11.  Severability.  In case any provision  contained in this  Agreement
should be  invalid,  illegal or  unenforceable  in any  respect,  the  validity,
legality and enforceability of the remaining  provisions  contained herein shall
not in any way be affected or impaired thereby.

         12.  Governing Law. This Agreement  shall be governed by, and construed
in accordance with, the internal laws of the State of California, without giving
effect to the principles of conflicts of law.

         13.  Counterparts.  This  Agreement  may be  executed  in  two or  more
counterparts, each of which shall constitute an original, but all of which, when
taken together, shall constitute but one instrument,  and shall become effective
when  one or more  counterparts  have  been  signed  by each  party  hereto  and
delivered to the other parties.

   14. Rule 144. The Company covenants that it will file the reports required to
be filed by it under the  Securities  Act and the Exchange Act and the rules and
regulations adopted by the SEC thereunder (or, if the Company is not required to
file such  reports,  it will,  upon the request of any Investor  holding  Shares
purchased  hereunder made after the second anniversary of the Closing Date, make
publicly  available  such  information  as necessary to permit sales pursuant to
Rule 144 under the Securities  Act), and it will take such further action as any
such Investor may reasonably  request,  all to the extent  required from time to
time  to  enable  such  Investor  to sell  Shares  purchased  hereunder  without
registration  under the  Securities  Act within the limitation of the exemptions
provided by (a) Rule 144 under the  Securities  Act, as such Rule may be amended
from time to time,  or (b) any similar rule or regulation  hereafter  adopted by
the SEC. Upon the request of any such Investor, the Company will deliver to such
holder a written  statement as to whether it has complied with such  information
and requirements.

                                   Page II-17
<PAGE>



                         INSTRUCTION SHEET FOR INVESTOR

      (to be read in conjunction with the entire Stock Purchase Agreement)


A.       Complete the following items in the Stock Purchase Agreement:

         1. Provide the  information  regarding  the  Investor  requested on the
signature  page  (page 1).  The  Agreement  must be  executed  by an  individual
authorized to bind the Investor.

         2.       Return the signed Stock Purchase Agreement to:

         Neurocrine Biosciences, Inc.       Robertson Stephens
         10555 Science Center Drive         555 California Street Suite 2600
         San Diego, CA  92121               San Francisco, California 94104
         Attn:  General Counsel             Attn: Richard Innenberg
         Phone: (619) 658-7670              Phone: (415) 248-4553
         Telecopy:  (619) 658-7602          Telecopy: (415) 693-3393

                  An executed  original Stock  Purchase  Agreement or a telecopy
         thereof must be received by 5:00 p.m.  California  time on a date to be
         determined and distributed to the Investor at a later date.

B.       Instructions regarding the transfer of funds for the purchase of Shares
         will be telecopied to the Investor by the Company at a later date.

C.       To resell the Shares after the Registration Statement covering the
         Shares is effective:

                  (i) Provided that a Suspension of the  Registration  Statement
         is not then in  effect  pursuant  to the  terms of the  Stock  Purchase
         Agreement,   the  Investor  may  sell  Shares  under  the  Registration
         Statement,  provided  that  it  arranges  for  delivery  of  a  current
         Prospectus to the transferee.  Upon receipt of a request therefor,  the
         Company   has  agreed  to  provide  an   adequate   number  of  current
         Prospectuses to each investor and to supply copies to any other parties
         requiring such Prospectuses.

                  (ii) The Investor must also deliver to the Company's  transfer
         agent, with a copy to the Company,  a Certificate of Subsequent Sale in
         the form attached as Exhibit A to the Stock Purchase Agreement, so that
         the Shares may be properly transferred.

                                   Page II-18

<PAGE>


                                                                     EXHIBIT 5.1

                           OPINION OF LATHAM & WATKINS

                                Latham & Watkins
                        633 West 5th Street, Suite 4000
                             Los Angeles, CA 90071
                                 (213) 485-1234

January 19, 2000

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

Ladies and Gentlemen:

We have acted as counsel to Neurocrine Biosciences, Inc., a Delaware corporation
(the "Company") in connection with the registration of up to 2,327,777 shares of
common stock of the Company,  par value $0.001 per share (the  "Shares"),  under
the Securities  Act of 1933, as amended (the "Act"),  pursuant to a Registration
Statement  on Form  S-3 to be filed by you  with  the  Securities  and  Exchange
Commission (the "Commission"), to be sold by certain selling stockholders.

As such  counsel,  we have examined such matters of fact and questions of law as
we have considered  appropriate for purposes of rendering the opinions expressed
below.   With  your  consent  we  have  relied  upon  the  foregoing  and  other
certificates of officers of the Company and of public  officials with respect to
certain factual matters.We have not independently verified such factual matters.

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 the laws of any
other  jurisdiction  or, in the case of Delaware,  any other laws,  or as to any
matters of municipal law or the laws of any local agencies within any state.

Subject to the  foregoing  and the other  matters  set forth  herein,  it is our
opinion that the Shares have been duly authorized, and are validly issued, fully
paid and non-assessable.

We  consent to your  filing  this  opinion  as an  exhibit  to the  Registration
Statement and to the reference to our firm  contained  under the heading  "Legal
Matters."

                                                              Very truly yours,

                                                              Latham & Watkins

                                   Page II-19
<PAGE>




                                                                    EXHIBIT 23.1


              CONSENT OF ERNST & YOUNG L.L.P., INDEPENDENT AUDITORS

         We consent to the reference to our firm under the caption  "Experts" in
the  Registration  Statement on Form S-3 and related  Prospectus  of  Neurocrine
Biosciences,  Inc. for the registration of shares of its common stock and to the
incorporation by reference  therein of our report dated January 26, 1999 (except
for Note 13,  as to which  the date is  March  2,  1999),  with  respect  to the
consolidated  financial statements of Neurocrine  Biosciences,  Inc. included in
its Annual Report on Form 10-K for the year ended December 31, 1998,  filed with
the Securities and Exchange Commission.

                                                     ERNST & YOUNG, L.L.P.


San Diego, California
January 18, 2000


                                   Page II-20


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