NEUROCRINE BIOSCIENCES INC
10-K, 1999-03-31
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                              ---------------------

                                    FORM 10-K
                              ---------------------

                                   (Mark One)
                  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                   For the fiscal year ended December 31, 1998
                                       OR
                TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                        For the transition period from to

                         Commission file number: 0-28150
                          NEUROCRINE BIOSCIENCES, INC.
             (Exact name of registrant as specified in its charter)

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

                               Delaware 33-0525145
                  (State or other jurisdiction (I.R.S. Employer
            of incorporation or organization) Identification Number)
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                 10555 Science Center Drive, San Diego, CA 92121
               (Address of principal executive office) (Zip Code)
- --------------------------------------------------------------------------------

       Registrant's telephone number, including area code: (619) 658-7600
        Securities registered pursuant to Section 12(b) of the Act: None
           Securities registered pursuant to Section 12(g) of the Act:
                         Common Stock, $0.001 par value

         Indicate  by check  mark  whether  the  registrant:  (1) has  filed all
reports  required to be filed by Section 13 or 15(d) of the Securities  Exchange
Act of 1934 during the preceding 12 months (or for such shorter  period that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.
                                                            Yes  X   No     

     Indicate by check mark if disclosure of delinquent  filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best  of  the  registrant's   knowledge,  in  definitive  proxy  or  information
statements  incorporated  by  reference  in Part  III of this  Form  10-K or any
amendment to this Form 10-K. 

         The  aggregate  market  value of the voting stock of the issuer held by
non-affiliates of the issuer on March 15, 1999 was  approximately  $88,054,931,
based upon the  closing  price of such stock of $6.31 on March 15,  1999.  As of
March  15,  1999,  18,960,581  shares  of Common  Stock of the  registrant  were
outstanding.

                       DOCUMENTS INCORPORATED BY REFERENCE

         Certain  information  required  by  Parts  I and  III of  Form  10-K is
incorporated by reference from the  Registrant's  Proxy Statement for the Annual
Meeting of  Stockholders  to be held on May 21,  1999 (the  "Proxy  Statement"),
which will be filed with the Securities and Exchange  Commission within 120 days
after the close of the Registrant's fiscal year ended December 31, 1998.


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<PAGE>
                                                                Page 4

                                     PART I

ITEM 1. BUSINESS

BACKGROUND

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

     The  following   Business  section  contains   forward-looking   statements
concerning the continuation of the Company's strategic alliances and the receipt
of payments thereunder, the identification of drug targets and selection of lead
compounds for clinical  development,  the commencement and successful conclusion
of clinical  trials,  the receipt of  regulatory  approvals,  and the  potential
development  of future  commercial  products.  Such  forward-looking  statements
necessarily involve risks and uncertainties.  The Company's actual results could
differ materially from those anticipated in these forward-looking  statements as
a result of  certain  factors,  including,  without  limitation,  that  research
funding and development will continue under the Company's  collaborations,  that
research  and   development   candidates  will   successfully   proceed  through
pre-clinical and early stage clinical trials,  that development  candidates will
prove  effective for  treatment in humans in later stage  clinical  trials,  the
timely  receipt  of  regulatory   clearances   required  for  clinical  testing,
manufacturing  and  marketing  of  products,  the  potential  adverse  impact of
competitive  technologies,  products,  and intellectual property rights of third
parties,  and the failure to achieve product  development and  commercialization
goals.  Actual results and the timing of certain events could differ  materially
from those indicated in the forward-looking  statements as a result of these and
other factors. See "Risk Factors."

     Neurocrine  currently  has  five  programs  in  clinical  development.  The
Company's  CRF  receptor  antagonist  project is  currently in Phase II clinical
development with its partner,  Janssen  Pharmaceutica,  for  anxiety/depression.
Neurocrine  and its partner,  Novartis  Pharmaceuticals,  are  conducting  their
second Phase II clinical trial with  Neurocrine's  Altered  Peptide Ligand (APL)
compound in patients with multiple  sclerosis.  Neurocrine is conducting a Phase
I/II trial with for its IL-4  Fusion  Toxin for  glioblastoma  (malignant  brain
tumors).  The Company has also  completed a Phase Ib clinical  trial in insomnia
with a GABA receptor subtype agonist and recently  announced that it commenced a
Phase I safety and dose escalating  clinical study with an APL compound for Type
I Diabetic patients.

PRODUCTS UNDER DEVELOPMENT

     The following  table  summarizes  Neurocrine's  most  advanced  products in
research  and clinical  development.  This table is qualified in its entirety by
reference to the more  detailed  descriptions  appearing  elsewhere in this Form
10-K.

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------
Program                                    Indication                    Status                Commercial Rights
- -------                                    ----------                    ------                -----------------
<S>                                        <C>                            <C>                  <C>    
CRF Receptor Antagonist                    Anxiety/Depression             Phase II             Janssen/Neurocrine
Altered Peptide Ligand                     Multiple Sclerosis             Phase II             Novartis/Neurocrine
IL-4 Fusion Toxin                          Glioblastoma                   Phase I/II           Neurocrine
GABA Receptor Subtype Agonist              Insomnia                       Phase I/II           Neurocrine
Altered Peptide Ligand                     Type I diabetes                Phase I              Neurocrine

CRF Receptor Antagonist                    Stroke                         Development          Neurocrine
CRF / Urocortin Agonist                    Alzheimer's/Obesity            Research             Lilly/Neurocrine
Excitatory Amino Acid Transporters         Stroke                         Research             Wyeth-Ayerst/Neurocrine
Melanocortin Receptor Antagonist           Obesity                        Research             Neurocrine
Chemokine Antagonist                       Inflammatory Disorders         Research             Neurocrine
GNRh                                       Endometriosis                  Research             Neurocrine
Neurogenomics                              Neurodegenerative              Research             NPI/Neurocrine
- ------------------------------------------------------------------------------------------------------------------------
<FN>

       (1) "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.


        "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  has  received  FDA  approval to
    evaluate one of the  Company's  products in humans to  determine  safety and
    efficacy in an expanded patient population.

</FN>
</TABLE>

Neurocrine's Research and Development Programs


Corticotropin Releasing Factor ("CRF")

     Corticotropin releasing factor, the central regulator of the body's overall
response to stress, affects multiple systems by functioning both as an endocrine
factor  and a  neurotransmitter.  CRF acts as a hormone at the  pituitary  gland
causing the secretion of the steroid  cortisol from the adrenal glands resulting
in a number of metabolic  effects,  including  suppression of the immune system.
CRF also functions as a neurotransmitter  in the brain and plays a critical role
in  coordinating  psychological  and  behavioral  responses  to  stress  such as
increased  heart rate,  anxiety,  arousal and reduced  appetite.  In addition to
neuroendocrine and neurotransmitter  roles,  accumulating evidence suggests that
CRF may also integrate actions between the immune and central nervous systems in
response to physiological and psychological stressors.

     The body has  several  mechanisms  to  regulate  the  effects  of CRF.  The
Company's  cloning of human CRF receptors and binding proteins suggests that the
diverse  functions of CRF are mediated through distinct  receptor subtypes which
are differentially distributed in specific brain areas and in tissues outside of
the central  nervous  system.  These  targets may offer a mechanism  to modulate
specific  actions of CRF without  affecting  the broad range of its  activities.
There are  several  diseases  and  disorders  such as  anxiety,  depression  and
substance abuse in which CRF levels are increased.  The  deleterious  effects of
high levels of CRF may be  countered  by the  administration  of  selective  CRF
receptor antagonists.

Anxiety

     Anxiety is among the most commonly  observed group of CNS disorders,  which
includes  phobias  or  irrational  fears,  panic  attacks,  obsessive-compulsive
disorders  and other  fear and  tension  syndromes.  Estimates  by the  National
Institute of Mental  Health  suggest that the most commonly  diagnosed  forms of
anxiety  disorders  may  affect  10% of the  United  States  population.  Of the
pharmaceutical  agents that are currently  marketed for the treatment of anxiety
disorders,  a class of compounds  known as the  benzodiazepines,  which includes
Valium,  is the most  frequently  prescribed.  In  spite  of  their  therapeutic
efficacy,  several side effects limit the utility of these  anti-anxiety  drugs.
Most problematic among these are drowsiness, ataxia (the inability to stand up),
amnesia,  drug  dependency and withdrawal  reactions  following the cessation of
therapy.

     Neurocrine  is  developing  a  new  class  of  therapeutics   that  targets
stress-induced   anxiety.   In  view  of  the   evidence   implicating   CRF  in
anxiety-related disorders,  Neurocrine is developing small molecule CRF receptor
antagonists as anti-anxiety  agents that block the effects of  overproduction of
CRF. The Company  believes that these  compounds  represent a class of molecules
based on a novel  mechanism of action that may offer the advantage of being more
selective,  thereby providing  increased efficacy with reduced side effects.  In
animal studies used to evaluate  anti-anxiety drugs,  Neurocrine scientists have
demonstrated  the efficacy of its clinical  compound  candidates  following oral
administration without evidence of apparent side effects. Neurocrine's corporate
partner,  Janssen,  selected a CRF-1  receptor  antagonist  drug  candidate  for
preclinical  testing in 1996 and commenced and completed Phase I clinical trials
on the  compound  in late  1998.  Results in animal  models of  anxiety  are not
necessary  predictive of efficacy in human  clinical  trials and there can be no
assurance that these compounds will demonstrate  clinical efficacy in humans. In
addition,  no assurance can be given that Janssen will successfully initiate and
complete  Phase II clinical  testing or progress to later  clinical  trials in a
timely manner.



Depression

     Depression is one of a group of  neuropsychiatric  disorders  that includes
extreme  feelings  of  elation  and  despair,  loss  of body  weight,  decreased
aggressiveness  and  sexual  behavior,  and loss of  sleep.  This  condition  is
believed  to result  from a  combination  of  environmental  factors,  including
stress,  as  well  as  an  individual's  biochemical  vulnerability,   which  is
genetically  predetermined.  The  biochemical  basis of depression is thought to
involve   elevated   secretion  of  CRF  and  abnormally  low  levels  of  other
neurotransmitters  in the  brain  such as  serotonin.  Clinical  depression  was
reported to affect 6% of the population or approximately 25 million  individuals
in the  United  States  in 1998.  Current  antidepressant  therapies,  including
Prozac,  increase the levels of  serotonin  and several  other  chemicals in the
brain. Because these drugs affect a wide range of  neurotransmitters,  they have
been associated with a number of side effects. While newer, more selective drugs
offer  some  safety  improvement,  side  effects  remain  problematic.   Another
limitation to most existing antidepressant therapies is slow onset of action.

     Neurocrine  and  its  corporate   partner  are  developing  small  molecule
therapeutics to block the effects of  overproduction of CRF for the treatment of
depression.  The Company has developed  several distinct  chemical series of CRF
receptor antagonists.  Janssen selected a drug candidate in 1996 for preclinical
testing and commenced  Phase I clinical  trials on the compound in late 1997 and
completed  these in 1998. In late 1998 a Phase II open label trial was initiated
in patients  with major  depression.  Results from this trial are expected to be
available in second half of 1999.  No  assurance  can be given that Janssen will
successfully  complete  Phase II clinical  testing of this candidate or that the
Phase II data will support  continuation of the program and additional  clinical
trials.

Stroke

     Stroke is an acute  neurologic  event  caused by  blockage  or  rupture  of
vessels,  which supply blood to the brain leading to nerve cell death.  Neuronal
damage progresses over a period of four to six hours.  According to the National
Institutes  of  Health  ("NIH")   estimates,   approximately   500,000  patients
experience a stroke in the United States each year, with an approximately  equal
incidence  in the rest of the  world.  Stroke  results in an  estimated  150,000
fatalities each year,  making it the leading cause of death behind heart disease
and cancer, and an estimated  additional 150,000 stroke victims suffer permanent
neurological damage.  Survivors of stroke are at significantly increased risk of
suffering  another  episode.  Current  treatments for stroke consist of surgery,
steroid therapy and  anti-platelet  therapy.  These treatments may help increase
blood flow but do not affect the  secondary  mechanisms  which  cause nerve cell
death.

     Neurocrine believes its CRF receptor antagonist program may have utility in
the treatment of stroke. Preliminary experiments in animal models of stroke show
enhancement  of  neuronal  survival  following  treatment  with  a CRF  receptor
antagonist.  Results  obtained  in animals  are not  necessarily  predictive  of
results obtained in humans,  and no assurance can be given that the Company will
successfully complete pre-clinical development of CRF antagonist drug candidates
appropriate  for stroke and enter into or complete  clinical  trials in a timely
manner, if at all.

Altered Peptide Ligands

     In North  America,  five percent of adults,  more than  two-thirds  of them
women, suffer from autoimmune diseases (including multiple sclerosis, rheumatoid
arthritis, Type I diabetes, systemic lupus erythematosus,  and thyroiditis). The
body's immune system employs  highly  specific T cells that recognize and attack
foreign antigens that invade the body. Occasionally,  certain T cells arise that
inappropriately  recognize  the body's own tissues as foreign.  While  virtually
every  individual  possesses these  self-reactive T cells, in only a fraction of
these people do the immune cells  actually  attack  healthy  tissue and cause an
autoimmune disease. In a healthy individual, the activity of these self-reactive
T  cells  is held in  check  by  other T  cells  that  regulate  their  function
(regulatory T cells).  If a defect in regulatory T cell function occurs,  or the
environment  favors the activity of self-reactive T cells, an autoimmune disease
results.  While it is not clear  what  triggers  the  immune  attack,  a current
hypothesis  suggests that people who are  genetically  predisposed to autoimmune
diseases  come in contact with certain  infectious  viruses or bacteria.  In the
process of controlling  the  infection,  the immune system targets an antigen on
the infectious  agent that resembles a  self-antigen.  These cells then begin to
attack  self-tissue,  resulting  in  autoimmune  disease.  Thus,  a  failure  in
regulation of the immune system at the level of dysfunctional regulatory T cells
predisposes an individual to autoimmune disease. Current reasoning suggests that
the   development  of  immune   specific  drugs  that  suppress  the  action  of
self-reactive  T cells and/or  restore the function of  regulatory T cells might
prove  advantageous  for  the  prevention/cure  or  treatment  of an  autoimmune
disease.

     The T cells involved in the autoimmune disease achieve specificity in their
various  functions  via their cell  surface  molecules  known as T cell  antigen
receptors ("TCR").  Each T cell expresses its own specific TCR on its surface. T
cells  recognize  antigens,  whether foreign or self-derived in the context of a
MHC molecule.  This then represents the ligand that hooks up and binds to such a
TCR. In this manner,  a peptide  fragment can send a signal to the T cell via an
antigen-specific  TCR that binds  specifically to this antigen.  After receiving
this  signal  through  its TCR,  the T cell will  divide,  proliferate,  secrete
cytokines and/or destroy healthy cells.

     If the structure of such a peptide fragment is altered,  such that it binds
to its specific TCR with much less affinity, this altered peptide ligand ("APL")
sends an incomplete  signal to the T cell. This incomplete or altered signal can
trick a T cell and prevent it from dividing, proliferating,  secreting cytokines
and/or  destroying  normal  cells.  Indeed,  if such an APL can be  designed  to
prevent  "killer" T cells from  destroying  healthy cells,  it would represent a
very  useful  antigen-specific  therapy  to prevent  the onset of an  autoimmune
disease.

Multiple Sclerosis ("MS")

     Multiple  sclerosis is a chronic immune mediated  disease  characterized by
recurrent attacks of neurologic dysfunction due to damage in the central nervous
system ("CNS").  The classic clinical features of MS include impaired vision and
weakness or  paralysis  of one or more limbs.  Patients  develop a slow,  steady
deterioration  of neurologic  function over an average duration of approximately
30 years. The cause of MS is unknown but immunologic or infectious  factors have
been implicated. According to the National Multiple Sclerosis Society, there are
an estimated  350,000  cases of multiple  sclerosis in the United  States and an
equal number of patients in Europe with approximately 20,000 new cases diagnosed
worldwide each year.  Currently  available  treatments for MS offer only limited
efficacy.  Steroids have been used to reduce the severity of acute flare-ups and
speed recovery.  Experimental  therapy with other  immunosuppressive  agents has
shown limited success.  Betaseron (a form of beta-interferon)  has been shown to
delay the onset of flare-ups  of the symptoms in patients and has been  approved
for   marketing   by  the  FDA.  In   addition,   Avonex,   a  similar  form  of
beta-interferon,  and  Copaxone,  a random  peptide  polymer,  have received FDA
approval for relapsing  remitting MS. In clinical trial with the beta-interferon
products, these therapies slowed progression of disease in MS patients, yet lead
to a variety of side effects including "flu-like" symptoms.

     Neurocrine's  cofounder,  Dr.  Lawrence  Steinman,  identified the dominant
invading  T cell in the  brains of  patients  who had died of MS.  Dr.  Steinman
further  identified the dominant target or recognition site on the myelin sheath
to which  invading  T cells  bind.  Neurocrine  has  exclusively  licensed  this
technology and has designed  altered  peptide  ligands,  which  resemble  native
disease-causing  molecules  of the  myelin  sheath.  These  molecules  have been
altered  to  attract  and bind to  disease-causing  T cells  and  inhibit  their
destructive capabilities.  Neurocrine's altered peptide ligand for the treatment
of MS has been shown to reverse  disease in animal models of MS and decrease the
production of cytokines such as gamma interferon and tumor necrosis factor-alpha
which contribute to the disease. These same molecules demonstrate the ability to
silence  pathogenic T cells from MS patients in vitro.  Together with  Novartis,
the Company's  collaborative  partner for this program,  Neurocrine filed an IND
and  received  approval in 1996 to  commence  clinical  trials.  The Company and
Novartis  subsequently  completed  Phase I  clinical  trials,  and two  Phase II
clinical trials currently underway in North America and Europe and are scheduled
to complete by the fourth  quarter of 1999 or the first  quarter  2000.  Results
obtained  in  animal  models of MS are not  necessarily  predictive  of  results
obtained in man,  and Phase I trials are not  designed to predict  efficacy.  No
assurance,  therefore, can be given that Novartis will successfully complete the
current Phase II clinical  studies or that results of these studies will warrant
additional clinical development of potential product.

Type I Diabetes

     Utilizing its experience in the development of APL for Multiple  Sclerosis,
Neurocrine has extended this approach to Type I or juvenile-onset diabetes. Like
MS, in Type I  diabetes  the  immune  system has  erroneously  targeted  healthy
tissue,  in this case the  pancreatic  cells  responsible  for the production of
insulin.  Type I diabetes is one of the most prevalent chronic conditions in the
North America,  afflicting  approximately  890,000  patients in 1997.  Diabetics
suffer from a number of  complications  of the disease  including heart disease,
circulatory  problems,  kidney  failure,  neurologic  disorders  and  blindness.
Current  therapy for Type I diabetes  consists of daily  insulin  injections  to
regulate blood glucose levels.

     The Company believes that an altered peptide ligand specific for autoimmune
T cells involved in diabetes may stop the  destruction of the insulin  secreting
cells in  pre-diabetic  patients,  thus  allowing them to delay or avoid chronic
insulin  therapy.  Working  with a leading  Diabetologist  at the Barbara  Davis
Center  for  Childhood  Diabetes  at  the  University  of  Colorado,  Neurocrine
scientists have engineered one of the dominant  pancreatic  antigens which is no
longer recognized by the pathogenic immune cell. In preclinical  models this APL
was capable of eliciting a protective  immune response by generating  cells that
secrete  factors  capable of  regulating  the  destructive  cells  reducing  the
incidence of diabetes. In addition,  experiments using immune cells derived from
the blood of Type 1 diabetes patients indicate that APL are recognized by immune
cells  response to insulin,  suggesting  that the APL may have the  potential to
intervene in the disease process in humans. Neurocrine is currently conducting a
Phase I safety and dose  escalating  clinical  program in  diabetic  patients in
Europe.  The results of the Company's  preclinical  studies in animals and cells
derived from Type I diabetes  patients  are not  necessarily  predictive  of the
results the Company will see treating Type I diabetes patients.  There can be no
assurance  that the APL will prove  safe in Phase I studies or that the  Company
will conduct additional clinical trials.

IL-4 Fusion Toxin

     IL-4 receptors are highly expressed in malignant brain tumors as well as in
cancers of the breast,  kidney, lung, colon, stomach,  ovary,  prostate,  and in
melanoma and mesothelioma.  Immunotoxins are a novel form of anticancer  therapy
under  investigation  in a variety of clinical  situations.  The  immunotoxin is
designed to carry a cellular toxin,  such as Pseudomonas  exotoxin,  to a target
antigen,  expressed on cancer cells.  Targeted  toxins have several  theoretical
advantages over  conventional  chemotherapy in that they may be extremely potent
and effective in chemotherapy-resistant T cells.

     Malignant brain tumors,  both primary and metastatic,  are a major cause of
cancer death.  Despite current therapeutic  options such as surgery,  radiation,
and chemotherapy, the median survival rate for malignant brain cancer is only in
the range of 9-12 months. Approximately 17,400 new cases of primary brain cancer
and 75,000 cases of  metastatic  brain tumor are  diagnosed in the United States
each  year,  with  comparable  incidence  numbers in  Europe.  According  to the
American  Cancer  Society,  the  incidence of malignant  brain tumors is rising.
Glioblastoma  (grade 4 astrocytoma)  is the most common primary  malignant brain
tumor.  These tumors arise within the brain and generally remain confined to the
brain.  The clinical course of glioblastoma is  characterized by relentless loss
of vital neurological functions and death within approximately twelve months.

     In 1998, the Company  exclusively  licensed from the National Institutes of
Health an anti-cancer compound,  referred to as IL-4 Fusion Toxin.  NBI-3001, or
IL-4 Fusion  Toxin is an  immunotoxin  which  fuses  interleukin-4  ("IL-4"),  a
cytokine, to Pseudomonas  exotoxin.  This molecule was designed as a result of a
collaboration between the FDA and the National Cancer Institute.  IL-4 receptors
Fusion  Toxin is a  chimeric  protein  in which a cytokine  (blood  cell  growth
factor)  known as  interleukin  4 (IL-4) has been joined  together  with another
molecule,  an exotoxin that can destroy  cancer  cells.  The IL-4 portion of the
Fusion Toxin  preferentially binds to human cancer cells, which express elevated
levels of high affinity  receptors for IL-4 on their  surface.  The advantage of
targeting  the IL-4  receptor is that  expression  of the  receptor is absent or
undetectable in normal brain tissue.

     In the preclinical setting,  NBI-3001 has been found to be highly cytotoxic
to brain tumor cell lines in vitro, and exhibits  anti-tumor activity in in vivo
models of brain tumor.  NBI-3001  has  completed a Phase I safety trial under an
Investigator  sponsored  IND in which  (9)  patients  with  recurrent  malignant
glioblastoma   were  treated.   Results  were   presented  at  The  Society  for
Neuro-Oncology   Meeting  in  an  abstract   entitled  "A  Circularly   Permuted
Interleukin-4  Pseudomonas Exotoxin for Treatment of Malignant Gliomas." In this
study,  NBI-3001  produced no evident  systemic or  neurological  toxicities  as
documented by serum  chemistry,  hematology  screen  including  liver panels and
neurological  examinations.  A physician-IND clinical trial does not replace the
need for  Company-sponsored  clinical  trials,  but can  provide  a  preliminary
indication as to whether further clinical trials are warranted. However, results
from the Physician IND sponsored  clinical study may not be repeated in a larger
study.  NBI-3001 is currently undergoing a Phase I/II trial targeting enrollment
of thirty  (30)  subjects  with  recurrent  glioblastoma  in which  the  primary
endpoints are safety,  tumor  regression,  and  progression  free survival.  The
Company  intends to complete  enrollment  of this trial in 1999,  and if results
warrant, commence an efficacy trial for NBI-3001 in early 2000. No assurance can
be given  that the  Company  will  successfully  complete  clinical  testing  or
progress to later clinical trials in a timely manner, or at all.

GABA Subtype Receptor Agonists

Insomnia

     The term  "insomnia"  is used to  describe  all  conditions  related to the
perception  of inadequate or  non-restful  sleep by the patient.  According to a
Gallup Survey conducted on behalf of the National Sleep  Foundation,  49% of all
Americans say that they have trouble  sleeping.  Often undiagnosed or dismissed,
insomniacs  have trouble  falling  asleep,  remaining  asleep or staying  awake.
Insomnia was also shown to be related to the age and sex of the individuals, the
prevalence of which is higher in older  individuals and females.  While insomnia
is  reported  to be a major  problem  in the adult  population  worldwide,  only
approximately  10% of such patients seek prescription  sleeping  medications for
their condition.  This fact may result from the perceived side effect profile of
currently marketed sedative-hypnotics.

     In the recent  past,  the majority of patients  treated for  insomnia  have
utilized  non-benzodiazepine  compounds,  which  show an  improved  side  effect
profile over the benzodiazepine class of sedative-hypnotics  utilized during the
1980's.  However,  currently  marketed  products  continue  to  exhibit  certain
unfavorable  side  effects,   including   synergy  with  other  CNS  depressants
(especially alcohol),  the development of tolerance upon repeat dosing,  rebound
insomnia following discontinuation of dosing, hangover effects the next day, and
impairment of psychomotor  performance and memory. Memory impairment,  which can
include amnesia for events occurring prior to and after drug administration,  is
of  particular  concern in the elderly whose  cognitive  function may already be
impaired by the aging process.  The elderly population,  which represent a large
portion  of  the  insomnia  market,   would  especially  benefit  from  a  novel
therapeutic with an improved safety profile,  rapidity of onset, and decrease in
memory impairment.

     In 1998 the Company signed an exclusive  worldwide licensing agreement with
DOV  Pharmaceuticals,  Inc.  for a  compound  in  clinical  development  for the
treatment of insomnia. The compound,  NBI-34060, works through the activation of
the benzodiazepine site on a GABA receptor subtype. It is through this mechanism
that the currently marketed therapeutics produces their sleep-promoting effects.
However,  NBI-34060, a next generation compound, is chemically distinct from the
benzodiazepines with a potentially improved pharmacokinetic profile and receptor
subtype  selectivity,  which may reduce the side effects  characteristic  of the
currently marketed products.

     Receptor  binding  studies  and  preclinical  animal  studies on  NBI-34060
indicate that it is a highly potent GABAA receptor agonist specific for the Type
1 site.  In animal  studies,  NBI-34060  shows a reduced  tolerance to sedation,
suggesting a lower potential for abuse, and a reduced tendency to potentiate the
deleterious effects of alcohol. In addition,  in animal models NBI-34060 appears
to be devoid of next day hangover effects and is expected to have a considerably
reduced amnestic potential.

     Prior to licensure by the Company,  a Phase I clinical  trial was conducted
in forty-two (42)  subjects.  The study was designed to determine the safety and
tolerance  of   NBI-34060,   and  provide  a   preliminary   evaluation  of  the
sedative-hypnotic potential in normal volunteers as reflected in self-ratings of
drowsiness,  disruption of memory,  and impairment of  psychomotor  performance.
NBI-34060  was well  tolerated,  with no serious or  unexpected  adverse  events
("AEs")  reported.  The only  consistently  reported side effect was drowsiness,
indicating  strong  potential  for  the  sedative-hypnotic   properties  of  the
compound.

     Based on  results  from this Phase I study,  in the first  quarter of 1999,
Neurocrine completed a Phase Ib clinical trial in thirty (30) healthy volunteers
to further explore the safety and kinetic profile of NBI-34060.  As demonstrated
in the first Phase I trail,  NBI-34060  demonstrated an adequate safety profile.
The Company  currently intends to conduct a Phase II clinical program in 1999 to
evaluate the efficacy of NBI-34060  in subjects  with chronic  insomnia,  and if
results  warrant,  initiate a pivotal  Phase III trial in 2000.  There can be no
assurance  that the side effects and efficacy  profile of NBI-34060  seen in the
Company's  animal  models and Phase I trials will be  confirmed  in the Phase II
trial or that the results of the Phase II trial will warrant further study.

CRF / Urocortin Agonist

     The body has several mechanisms to regulate the effects of CRF. CRF-binding
protein  ("CRF-BP")  binds to CRF and  holds it in an  inactive  state,  tightly
regulating  levels of CRF in certain brain  regions.  CRF-BP may provide a novel
target to  selectively  increase  levels of CRF in diseases that are  associated
with  decreased  levels of CRF,  such as  Alzheimer's  disease and  obesity.  In
addition, agonists of the CRF-2 receptor may represent a therapeutic strategy to
elevate CRF and a related  neuropeptide  urocortin  for the  treatment  of these
disorders.

Alzheimer's Disease

     Alzheimer's  disease is a  neurodegenerative  brain  disorder that leads to
progressive  memory loss and dementia.  Alzheimer's  disease generally follows a
predictable  course of deterioration over eight years or more, with the earliest
symptom being impairment of short-term memory. Gradually, memory loss increases,
reasoning  abilities  deteriorate,  and individuals become depressed,  agitated,
irritable  and  restless.  In the final stages of the disease,  patients  become
unable  to  care  for   themselves.   According  to  the  National   Alzheimer's
Association, in 1994 over four million individuals in the United States suffered
from  Alzheimer's  disease.  Alzheimer's  disease is the fourth leading cause of
death  for  adults,  responsible  for over  100,000  deaths  in  1994.  Marketed
therapies  currently  available  for the  treatment of  Alzheimer's  disease are
severely  limited.  Tacrine and Aricept  have been  recently  approved  for this
indication,  but,  show limited  memory  improvement  in  Alzheimer's  patients;
concerns  regarding  drug-induced  elevations  in liver  enzymes  and other side
effects have limited the widespread use of these products.

     Neurocrine  scientists have found that there are  significant  decreases in
CRF levels in the brain areas that are affected in Alzheimer's disease. In spite
of reduced CRF  concentrations,  CRF-BP levels are not decreased in areas of the
brain  affected by  Alzheimer's  disease,  thereby  providing the Company with a
novel  target for drug  intervention.  Consequently,  Neurocrine  is  developing
CRF-BP  antagonists  to displace  CRF from the binding  protein and  effectively
increase the amount of "free CRF"  available to interact with the CRF receptors.
This strategy is expected to selectively raise the concentration of CRF in brain
areas  involved in learning and memory  processes.  Because the  therapeutic  is
designed  to  restore  normal  levels of CRF only in these  areas,  the  Company
believes  that the drug  will  not  induce  the  side  effects  associated  with
administering  CRF directly,  such as anxiety.  Current  efforts are underway to
identify  and  optimize  molecules  through  high-throughput  screening of small
molecule libraries.  However, no assurance can be given that the Company and its
corporate  partner,  Eli Lilly,  will successfully  identify suitable  candidate
compounds for development in a timely manner, or at all.

Obesity

     Obesity is the most common nutritional  disorder in Western  societies.  As
many as three in ten adult Americans weigh at least 20% in excess of their ideal
body weight,  and 35 million  people in the United States are  characterized  as
clinically obese.  Increased body weight is a significant  public health problem
because it is associated  with a number of serious  diseases,  including Type II
diabetes, hypertension, hyperlipidemia and several cancers. Although obesity has
been commonly considered to be a behavioral problem,  there is now evidence that
body  weight is  physiologically  regulated.  The  regulation  of body weight is
complex  and  appears to  consist  of both  centrally  and  peripherally  acting
mechanisms.

     Preliminary data indicates that CRF and a related neuropeptide,  urocortin,
may act as central  regulators of both appetite and  metabolism.  Neurocrine has
evaluated CRF-BP  antagonists and CRF receptor agonists in various animal models
of obesity  and have  shown  effects of  reduced  food  intake and weight  loss.
Neurocrine  and its corporate  partner Eli Lilly are  screening  and  optimizing
small molecule  compounds for evaluation in  confirmatory  preclinical  studies.
However,  no assurance can be given that the Company and its  corporate  partner
will successfully  identify CRF and urocortin  agonists suitable as anti-obesity
therapeutics  in a timely manner,  or at all.  Further,  even if the Company and
Lilly are successful in identifying  drug  candidates,  the results  obtained in
animals are not  necessarily  predictive of results  obtained in humans,  and no
assurance  can be given that the Company  will  progress  to clinical  trials or
successfully complete clinical trials in a timely manner, if at all.

Excitatory Amino Acid Transporters ("EAATs")

     EAATs serve as novel targets for the  development of drugs,  which modulate
toxic levels of glutamate in the brain.  Neurotransmitter  transporters  play an
important  role in regulating the levels of  neurotransmitters,  and some of the
most successful CNS drugs are ones that selectively  target these  transporters.
For example,  the Selective  Serotonin  Reuptake  Inhibitors  ("SSRIs")  such as
Prozac selectively  inhibit the serotonin  transporter  modulating the serotonin
levels for therapeutic benefit. Similarly,  Neurocrine is targeting the EAATs to
selectively modulate the levels of the excitatory  neurotransmitter glutamate to
produce a therapeutic  benefit in disorders where glutamate  levels are abnormal
such as in  stroke,  head  trauma,  retinal  ischemia,  schizophrenia  and other
neurodegenerative  and  psychiatric  disorders.   Neurocrine  has  entered  into
collaboration  with Wyeth-Ayerst  focusing on modulating  glutamate  transporter
function as a novel strategy for the treatment of  neurodegenerative  disorders.
Neurocrine and  Wyeth-Ayerst  will target the EAATs to selectively  modulate the
levels of the  excitatory  neurotransmitter  glutamate to produce a  therapeutic
benefit in disorders where glutamate levels are abnormal.  These activities will
include  basic  research  to  understand  the  function  and  regulation  of the
transporters,  the  identification  of suitable  chemical  hits,  along with the
identification and  characterization of chemical and biological leads. There can
be no  assurance  that  the  Company  and  Wyeth-Ayerst  will be  successful  in
demonstrating  EAATs as  therapeutic  targets  or that  they will  identify  any
product candidates for pre-clinical or subsequent clinical development.



<PAGE>


Melanocortin Receptor Antagonists

     Melanocortin receptors are involved in the control of endocrine,  autonomic
and central  nervous  system  function.  To date, a family of five  melanocortin
receptor subtypes has been identified;  several of which have been cloned by the
Company's consultants and scientists. One of the melanocortin receptor subtypes,
MC4, has recently  been  identified  as an important  regulating  mechanism  for
appetite,  body weight and insulin secretion which represents a novel target for
the  treatment  of  obesity  and  diabetes.   This   technology   combined  with
Neurocrine's  expertise  in  obesity,  anorexia  nervosa and  diabetes  provides
additional avenues for the discovery of effective therapies for the treatment of
other endocrine functions and brain disorders.

Chemokines

     Chemokines are immune / inflammatory  mediators  considered  central to the
trafficking of leukocytes.  Restricted and sub-type specific expression of their
receptors in different pathologies and on T lymphocytes, dendritic cells and CNS
tissue,  suggests a role for these  mediators in diseases  characterized  by CNS
inflammation and leukocyte invasion.  All  ligand-receptor  interactions lead to
migration of the cell types  expressing the receptor,  hinting at a central role
for these  molecules in the  recruitment  / invasion of the  diseased  tissue by
these cells and their potential role in the ensuing  destruction.  Antagonism of
this effect may, therefore, be of benefit. In addition to an in-depth program of
discovery research,  the Company has decided to screen our library against these
receptor  systems  in  order  to  identify  small  molecule  antagonists.  Since
chemokines  are large  proteins and have multiple  interaction  sites with their
receptors, the design of specific, high-affinity competitive antagonists will be
required.  Antagonists are being tested in inflammatory  animal models including
experimental  autoimmune   encephalomyelitis  (EAE,  for  MS),  arthritis,   and
diabetes.

     Given the complexity of the chemokine  area,  Neurocrine has focused on the
more  recently  discovered  receptors in an attempt to generate  small  molecule
antagonists.  To that end,  numerous  chemokine  receptors have been  expressed,
screened  against our small molecule  library,  and structure  activity  studies
undertaken.  There can be no assurance that the Company's  research in this area
will lead to product candidates.

Gonadotrophin-Releasing Hormone (GnRH) Receptor

     Gonadotrophin-releasing   hormone  is  a  hypothalamic   decapeptide   that
stimulates  the secretion of the pituitary  gonadotropins,  luteinizing  hormone
(LH) and  follicle-stimulating  hormone (FSH). The  gonadotropins,  in turn, are
necessary  for gonadal  steroid  production  and normal  reproductive  function.
Chronic  administration  of GnRH  superagonist  peptides has been found to cause
down  regulation  of the GnRH receptor  resulting in a paradoxical  reduction in
circulating   levels  of  testosterone  or  estrogen,   equivalent  to  surgical
castration  or  oophorectomy,  respectively.  This  reversible  shutdown  of the
reproductive  endocrine axis has proven  clinically  useful in treating  hormone
dependent proliferative diseases such as endometriosis,  prostate carcinoma, and
breast cancer, and resulted in several peptide drugs such as Lupron and Zoladex,
with an  estimated  market in excess of $1  billion.  However,  current  peptide
agonist  based drugs have several  drawbacks.  They require 3-4 weeks before the
regulatory  activities  are observed,  and during this period their  stimulatory
effects can result in a  worsening  of the  disease.  Being  peptides  they also
require  subcutaneous  injection or nasal  administration  and are  expensive to
manufacture.

     The Company  has  screened  its small  molecule  library and has  conducted
structure  activity studies aimed at producing a small molecule GnRH antagonist.
Several  series of small molecule  compounds have been  identified and are being
evaluated as candidates for further development.

Neurogenomics

     The brain and  spinal  cord are  comprised  of two major cell types - glial
cells and neurons.  Glial cells are the most prevalent cell types in the central
nervous system,  comprising over 75% of all brain cells.  The gene products from
these cells are crucial for the survival and development of neurons. Neurons are
CNS cells that transmit and receive  complex  electrical  and chemical  messages
from other neurons to control all cognitive  processes.  In certain pathological
states,  excessive  glial  activity  results in the  activation  of cytosine and
related  genes.  The proteins  encoded by these genes may be  implicated  in the
degenerative  cascade  leading to  neurological  disorders  such as  Alzheimer's
disease,  stroke,  multiple sclerosis,  Parkinson's  disease,  epilepsy and AIDS
dementia.  For example,  in AIDS, the HIV virus does not attack neurons but does
infect  glial  cells  which in turn  release  inflammatory  cytokines  and other
factors  which  are  toxic  to  neurons.   Similarly,  in  Alzheimer's  disease,
accumulating  evidence suggests complex interactions between neurons, glia and a
protein  fragment  known as beta amyloid  leading to formation of senile plaques
and neurodegeneration.  Currently, it is estimated that only a small fraction of
genes involved in  neurodegeneration  or regeneration has been  identified.  The
identification of novel CNS genes involved in the neurodegenerative  process may
yield new therapeutic opportunities.

Neurodegenerative Diseases and Disorders

     Neurodegenerative  diseases and  disorders  involve  damage to the cellular
structure of the brain either acutely,  as in stroke or trauma,  or chronically,
as in  epilepsy  and  Alzheimer's  disease.  To date,  only a limited  number of
effective  therapeutics  exists to treat  neurological  disorders,  resulting in
significant  economic  and social  costs.  In 1998,  over 26 million  people are
estimated in the United States to be affected by neurological disorders.

     Activation  of glial  cells is a common  feature of many  neurodegenerative
diseases. The primary goal of Neurocrine's  Neurogenomics program is to identify
and  characterize  novel genes that are induced in glial cells under  conditions
that lead to  neurodegeneration  or  regeneration.  The  Company is  focusing on
stroke,  multiple sclerosis,  AIDS dementia,  epilepsy,  Parkinson's disease and
Alzheimer's  disease. The unique conditions leading to neurodegeneration in each
of the disorders have been established in both animal and cellular models of the
disease.  Neurocrine is actively  isolating and analyzing genes  associated with
neuronal  cell  death  utilizing  state  of  the  art  molecular  biology,  gene
sequencing  and   bioinformatics.   In  addition,   activated   genes  that  are
neuroprotective or allow for the regeneration of neurons may also be identified.

     Novel  neurodegenerative  genes that are discovered  may include  proteins,
enzymes or receptors.  Protein  signaling  molecules or the genes  encoding such
molecules may be utilized as therapeutics, while enzymes and receptors may serve
as new targets for drug  discovery.  Neurocrine  currently  intends to place the
receptors and enzymes  encoded by these genes in  high-throughput  screens in an
attempt to  discover  small  molecule  therapeutics  to treat  neurodegenerative
disorders. To date, the Company has identified novel genes of which a number are
undergoing  biological  evaluation  in in vitro and animal  models.  The Company
currently  intends to identify  candidate genes as drugs or drug targets for one
or more  neurological  diseases.  However,  there can be no  assurance  that the
Company will successfully identify suitable gene candidates for development in a
timely manner, or at all.



BUSINESS STRATEGY

     The Company's  strategy is to utilize its  understanding  of the biology of
the central nervous,  immune and endocrine systems to identify and develop novel
therapeutics. There are five key elements to the Company's business strategy:

     Target Multiple  Product  Platforms.  The Company  believes 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.  Neurogenomics and chemokines allow
the Company to combine its neuroscience  and immunology  expertise with new drug
discovery  technologies to identify novel  gene-related  product or gene therapy
opportunities.

     Identify Novel Neuroscience and Immunology Drug Targets for the Development
of  Therapeutics  Which  Address  Large Unmet Market  Opportunities.  Neurocrine
employs  molecular  biology as an enabling  discipline  to  identify  novel drug
targets such as receptors,  genes and  gene-related  products.  The Company uses
advanced  technologies,   including  combinatorial  chemistry,   high-throughput
screening,  gene  sequencing and  bioinformatics,  to discover and develop novel
small molecule  therapeutics  for diseases and disorders of the central  nervous
and immune systems including anxiety, depression,  Alzheimer's disease, multiple
sclerosis, neurodegeneration, diabetes, obesity and insomnia.

     Leverage Strategic Alliances to Enhance  Development and  Commercialization
Capabilities.  Neurocrine  intends to leverage the  development,  regulatory and
commercialization   expertise  of  its  corporate  partners  to  accelerate  the
development  of  its  potential   products,   while   retaining   commercial  or
co-promotion  rights in North America.  The Company intends to further  leverage
its  resources  by  continuing  to enter  into  strategic  alliances  and  novel
financing mechanisms to enhance its internal  development and  commercialization
capabilities.

     To date,  Neurocrine  has entered  into  strategic  alliances  with Janssen
focusing on CRF receptor antagonists to treat anxiety, depression, and substance
abuse; with Novartis to develop altered peptide ligands for the treatment of MS;
and   with   Lilly   to   collaborate   in  the   discovery,   development   and
commercialization  of CRF-BP  antagonists  and CRF agonists for the treatment of
central  nervous  system  disorders  including  obesity  and  dementias  such as
Alzheimer's  disease.  More recently,  the Company  entered into a collaboration
with   Wyeth-Ayerst    Laboratories   for   the   research;    development   and
commercialization of compounds with modulate excitatory amino acid transporters.
The  Company  has also formed NPI, a research  and  development  subsidiary,  to
finance  its  Neurosteroid   clinical  development   program,   which  has  been
discontinued and its Neurogenomics  programs. In 1999 the Company entered into a
collaboration agreement with Wyeth-Ayerst to research, develop and commercialize
compounds which modulate  excitatory amino acid  transporters  ("EAATs") for the
treatment of neurodegenerative and psychiatric diseases.

     In  addition,  in 1998  Neurocrine  entered into two  alliances  with other
companies to enhance its drug discovery and development capabilities.  The first
alliance is with Medtronic Inc. to study the stability and compatibility of IL-4
Fusion  Toxin in  Medtronic's  implantable  drug pump and catheter  system.  The
second  alliance  is with  Caliper  Technologies.  Neurocrine  and  Caliper  are
collaborating  to apply  Caliper's  microfluidics  technology to the  ultra-high
throughput screening of Neurocrine's proprietary targets.

     Outsource  Capital  Intensive  and  Non-Strategic  Activities.   Neurocrine
intends  to focus its  resources  on  research  and  development  activities  by
outsourcing its requirements for manufacturing, preclinical testing and clinical
monitoring activities.  The Company utilizes contract current Good Manufacturing
Processes ("cGMP") manufacturing for clinical programs including the IL-4 Fusion
Toxin program,  insomnia and diabetes.  Neurocrine believes that availability of
skilled contract  manufacturers  and contractors will allow the Company to focus
on its core discovery and development  programs to generate  additional  product
opportunities.

     Acquire Complementary Research and Development Drug Candidates.  Neurocrine
plans 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 it
is developing in cooperation  with its strategic  partners.  In 1998 the Company
licensed  from the National  Institutes  of Health an IL-4 Fusion Toxin which is
currently in Phase I/II clinical trials for recurrent glioblastoma.  In May 1998
the Company  completed the  acquisition  of Northwest  NeuroLogic,  Inc.  (NNL),
acquiring  the  intellectual  property  surrounding  the  Excitatory  Amino Acid
Transporters (EAATs) 1 through 5 and Melanocortin  receptors.  In addition,  the
scientific  founders  of NNL,  Drs.  Roger Cone and Susan  Amara,  of the Vollum
Institute  became exclusive  consultants to the Company.  Also in June 1998, the
Company   exclusively    licensed   worldwide   commercial   rights   from   DOV
Pharmaceuticals,  Inc.  for a  compound  which has  completed  Phase I  clinical
development for the treatment of insomnia.



TECHNOLOGY

     Neurocrine  utilizes  advanced  technologies  to enhance its drug discovery
capabilities and to accelerate the drug development process.  These technologies
include:

     High-Throughput  Screening  ("HTS").  Neurocrine  has  assembled a chemical
library of diverse,  low molecular  weight  organic  molecules for lead compound
identification.  The Company has  implemented  robotics  screening  capabilities
linked to its library of compounds that facilitate the rapid  identification  of
new drug  candidates  for multiple drug targets.  The Company  believes that the
utilization  of  high-throughput  screening and medicinal and peptide  chemistry
will enable the rapid identification and optimization of lead molecules.

     Combinatorial  Chemistry.  Recent  developments in both  computational  and
combinatorial  chemistry  have shown  that it is now  possible  to design  small
libraries  focused  around hits emerging  from HTS both to evaluate  rapidly the
quality  of such hits and also  subsequently  optimize  the  selected  hits into
advanced lead candidates. The approach involves learning from the set of hits as
a whole and using this  information to design libraries of compounds that may be
structurally  independent  of the original  hits.  Neurocrine  is acquiring  the
necessary  technologies  to facilitate the process of library  design,  parallel
synthesis and rapid purification and  characterization of compounds.  Neurocrine
will use the same process to  supplement  the  corporate  compound  library with
structures  relevant for internal projects and hence improve the likelihood that
HTS will discover a meaningful array of useful hits.

     Molecular Biology. Neurocrine scientists have utilized novel techniques for
examination of gene expression in a variety of cellular systems. The company has
developed a  sophisticated  technique to evaluate the type and quantity of genes
in various cellular systems prior to the isolation of genes. Neurocrine has also
developed  unique  expression  vectors  and cell lines that allow for the highly
efficient protein expression of specific genes.

     Gene Sequencing. Neurocrine applies integrated automated DNA sequencing and
gene  identification  technology  in  its  Neurogenomics  program.  The  systems
utilized  by   Neurocrine   allow  for  extended   gene  analysis  in  a  rapid,
high-throughput  format with independent linkage into a sequence  identification
database.   Neurocrine  has  optimized  gene  sequencing   instrumentation   for
"differential display," a technique that may facilitate the rapid identification
of novel genes.

     Bioinformatics.  Neurocrine's  Neurogenomics  program creates a significant
amount of genetic sequence  information.  Applied genomics relies on information
management  systems to collect,  store and  rapidly  analyze  thousands  of gene
sequences.  Neurocrine has developed a bioinformatics  system, which the Company
believes  will  allow  it  to  identify  novel  genes,  which  are  involved  in
neurodegeneration.  Data are collected by automated  instruments  and stored and
analyzed  by  Neurocrine   using  customized   computational   tools.  To  date,
Neurocrine's molecular biologists have identified over 4,500 novel genes.



STRATEGIC ALLIANCES

     The Company's business strategy is to utilize strategic alliances and novel
financing   mechanisms  to  enhance  its   development   and   commercialization
capabilities. To date, Neurocrine has completed the following alliances:

JANSSEN PHARMACEUTICA, N.V.

     On January 1, 1995,  Neurocrine  entered  into a research  and  development
agreement  with  Janssen  to  collaborate  in  the  discovery,  development  and
commercialization  of CRF  receptor  antagonists  focusing on the  treatment  of
anxiety,   depression  and  substance  abuse  (the  "Janssen  Agreement").   The
collaboration  utilizes Neurocrine's expertise in cloning and characterizing CRF
receptor  subtypes,  CRF pharmacology and medicinal  chemistry.  Pursuant to the
Janssen Agreement, the Company has received $2.0 million in license payments. In
connection with the Janssen Agreement, Johnson & Johnson Development Corporation
("JJDC")  purchased $5 million of the Company's Common Stock. The  collaborative
research portion of the Janssen Agreement was completed as scheduled in 1997.

     In 1996 Janssen selected a clinical candidate and commenced clinical trials
in Europe. Under the Janssen Agreement,  Neurocrine is entitled to receive up to
$10.0 million in milestone payments for the indications of anxiety,  depression,
and  substance  abuse,  and up to $9.0 million in  milestone  payments for other
indications, in each case upon achievement of certain development and regulatory
goals.  As of  December  31,  1998 the  Company  has  received  $3.5  million in
milestone payments from Janssen. Janssen is responsible for funding all clinical
development and marketing activities,  including reimbursement to Neurocrine for
its  promotional  efforts,  if any. The Company has granted Janssen an exclusive
worldwide license to manufacture and market products developed under the Janssen
Agreement. The Company is entitled to receive royalties on Janssen product sales
throughout the world. The Company has certain rights to co-promote such products
in North  America.  There can be no assurance that the Company and its corporate
partner will be  successful in  developing,  receiving  regulatory  approvals or
commercializing  any potential products  discovered under the Janssen Agreement.
As a result, there can be no assurance that any product development milestone or
royalty payments will be made.
NOVARTIS

     In January 1996, the Company  entered into a binding letter  agreement with
Ciba-Geigy  (which  subsequently  became  Novartis) to develop  altered  peptide
ligand  therapeutics  for the  treatment  of MS based  upon the  Company's  drug
development  candidates  and expertise in immunology and protein  chemistry.  In
December 1996, the Company and Novartis entered into a definitive agreement (the
"Novartis  Agreement")  incorporating  the terms and conditions set forth in the
letter agreement and certain other terms and conditions agreed to by the Company
and Novartis.  Novartis paid the Company a $5.0 million non-refundable fee prior
to executing the Novartis Agreement.  In connection with the Novartis Agreement,
Novartis purchased $10.0 million of the Company's Common Stock.  Pursuant to the
Novartis  Agreement,  Novartis is  obligated  to provide  the Company  with $3.5
million  in  research  and  development  funding,  plus  certain  other  program
expenses, each year for five years ending on December 31, 2000. In event that no
biological  license  application  ("BLA")  has been  filed  as a  result  of the
collaboration  by December 31, 2000,  then  Novartis may be obligated to provide
the Company with an additional $2.5 million per year thereafter  until a Product
License  Application is filed, except in certain  circumstances.  As of December
31, 1998 the Company has  received a total of $20.2  million in license fees and
research  funding  under the  Novartis  Agreement  (including  the $5.0  million
non-refundable  fee).  Neurocrine is also entitled to receive milestone payments
if  certain  research,  development  and  regulatory  milestones  are  achieved.
Milestone  payments  were  $3.8  million  and $2.3  million  in 1997  and  1998,
respectively.  Novartis has the right to terminate the Novartis Agreement on six
months' notice, which may be given at any time after December 30, 1997.

     The Company has granted Novartis an exclusive license outside of the United
States and Canada to market altered peptide ligand products  developed under the
Novartis  Agreement  for multiple  sclerosis.  Neurocrine is entitled to receive
royalties on product sales in these territories. The Novartis Agreement provides
that the Company and  Novartis  will  collaborate  in the  marketing of products
developed  under  the  Novartis  Agreement  in the  United  States  and  Canada.
Neurocrine is entitled to receive a share of the profits resulting from sales of
altered  peptide ligand  products in the United States and Canada subject to the
recoupment of a portion of Novartis's development costs.  Neurocrine retains the
right to convert its profit  share to the right to receive  royalty  payments at
its sole  discretion in which case no repayment of development  costs are due to
Novartis  and Novartis  will have  exclusive  marketing  rights.  Neurocrine  is
obligated to repay a portion of the development  costs of any potential  product
developed pursuant to the collaboration  unless the Company elects to convert to
the  right to  receive  royalty  payments.  There can be no  assurance  that the
Company and Novartis will be successful  in  developing or  commercializing  any
potential  products.  As a result,  there can be no  assurance  that any product
development milestone, royalty, or profit sharing payments will be made.

ELI LILLY AND CO.

     On  October  15,  1996,  Neurocrine  entered  into a research  and  license
agreement  (the "Lilly  Agreement")  with Lilly to collaborate in the discovery,
development and  commercialization  of CRF binding protein ligand inhibitors for
the  treatment  of  central  nervous  system  disorders  including  obesity  and
dementias  such as  Alzheimer's  disease  and CRF-2  agonists  for CNS  mediated
diseases  and  disorders.  Neurocrine  has  received  $14.5  million in research
payments under the Lilly Agreement,  of which $4.0 million was received in 1998.
Neurocrine  expects to receive an additional  $3.0 million in research  payments
through October 31, 1999, as well as additional sponsored research payments over
the  subsequent  two-year  period if certain  milestones  are met,  and up to an
additional  $49.0  million in milestone  payments for the first two products for
dementia  or  obesity if  certain  development  and  regulatory  milestones  are
achieved.  The Company  has  granted  Lilly an  exclusive  worldwide  license to
manufacture and market CRF binding protein ligand  antagonists and CRF-2 agonist
products. Lilly is obligated to fund clinical development and marketing expenses
(except  as set  forth  below)  and is  responsible  for  clinical  development,
regulatory compliance, and manufacturing of products.  Neurocrine is entitled to
royalties on product sales.  At its option,  Neurocrine is entitled to receive a
portion of the profits  resulting  from sales of products  for the  treatment of
dementia in the United  States  (subject to the  Company's  obligation  to pay a
portion of the development costs for such product).  Lilly has agreed to provide
the  Company  with  access to a portion of its  chemical  compound  library  for
screening  against targets outside of the field of the Lilly Agreement and other
Lilly program areas,  subject to the Company's obligation to pay Lilly royalties
on sales of products  developed based on compounds in such library and milestone
payments  based upon certain  development  and  regulatory  milestones  for such
products.  There can be no assurance that the Company's research under the Lilly
Agreement will be successful in discovering any potential products or that Lilly
will  be  successful  in  developing,   receiving   regulatory   approvals,   or
commercializing any potential products that may be discovered. As a result there
can be no assurance that any product development  milestone,  royalty, or profit
sharing payments will be made.

WYETH-AYERST

     Effective  January 1, 1999, the Company  entered into a  Collaboration  and
License Agreement relating to the research, development and commercialization of
compounds which modulate  excitatory amino acid  transporters  ("EAATs") for the
treatment  of  neurodegenerative  and  psychiatric  diseases.  Pursuant  to  the
agreement,  Wyeth-Ayerst  will  provide  the  Company  with up to $13 million in
research and development  funding.  The initial term of the funded research will
be three years,  subject to earlier termination or extension upon achievement of
certain  benchmarks  upon mutual  agreement of the parties.  The Company is also
entitled  to  receive up to $69.2  million in  milestones  upon  achievement  of
certain research, development and regulatory events.

     In  addition,   under  certain  circumstances  the  Company  may  have  the
opportunity to co-promote  products with  Wyeth-Ayerst  in the United States and
Canada.  There can be no  assurance  that the Company and  Wyeth-Ayerst  will be
successful in research and drug  discovery  based on this  technology,  that any
pre-clinical and clinical drug candidates  arising from the  collaboration  will
generate commercial product candidates that have viable clinical, regulatory and
intellectual  property profiles or that any commercial products arising from the
collaboration will enjoy market acceptance. Therefore, there can be no assurance
that any  milestones or royalty  income will be payable to the Company under its
agreement with Wyeth-Ayerst.

NEUROSCIENCE PHARMA INC.

    In March 1996,  Neurocrine  formed  Neuroscience  Pharma,  Inc.  ("NPI"),  a
research and development company.  Neurocrine licensed to NPI certain technology
and Canadian  marketing rights to the Company's  Neurosteroid and  Neurogenomics
programs in exchange for 49% of the outstanding  Common Stock of NPI. A group of
Canadian  institutional  investors invested approximately $9.5 million in NPI in
exchange for  Preferred  Stock of NPI,  which could be  exchanged  for shares of
Neurocrine's  Common Stock.  During 1997 and 1998 these  investors  redeemed the
Preferred  Stock for an  aggregate  of  1,279,758  shares of Common Stock of the
Company.  Pursuant to a Research and  Development  Agreement with a wholly owned
subsidiary of the Company,  NPI committed to expend an aggregate  amount of $9.5
million  for  clinical  development  of DHEA,  a  neurosteroid  for  Alzheimer's
Disease.  The DHEA Neurosteroid Program was discontinued in March 1999 following
results from the Phase  II/III  trial.  Despite  suggestion  of efficacy  from a
previously  completed 60 patient Phase II trial, the results of its Phase II/III
trial did not demonstrate a difference in efficacy between patients treated with
DHEA  versus  placebo.  Based on these  results,  NPI has  discontinued  further
development  of DHEA.  NPI will continue its research  activities in the area of
neurogenomics.  Pursuant to such  Research  and  Development  Agreement,  NPI is
entitled to receive  royalties on sales of products  developed in these programs
as well as exclusive  Canadian  marketing  rights for such products in the event
that the Company has not  terminated  the  technology  license and the marketing
rights. In connection with their initial  investment in NPI, such investors also
received  warrants  exercisable for 383,875 shares of the Company's Common Stock
and are eligible to receive additional  warrants in the future in the event that
NPI receives certain Canadian government incentives for research activities.



RISK FACTORS

DEPENDENCE ON STRATEGIC ALLIANCES

     The Company is dependent  upon its corporate  partners to provide  adequate
funding for certain of its  programs.  Under these  arrangements,  the Company's
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
these  partners to select a compound  discovered  by the Company for  subsequent
development into marketable products, gain the requisite regulatory approvals or
successfully  commercialize products would have a material adverse effect on the
Company's business, financial condition and results of operations. The Company's
strategy for  development  and  commercialization  of certain of its 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 the Company will be able to enter into  additional  strategic  alliances on
terms favorable to the Company,  or at all. Failure of the Company to enter into
additional  strategic  alliances  would  have a material  adverse  effect on the
Company's business, financial condition and results of operations.

     The  Company  cannot  control the amount and timing of  resources  that its
corporate  partners devote to the Company's programs or potential  products.  If
any of the Company's  corporate  partners breach or terminate  their  agreements
with the Company 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 the Company will be
required   to  devote   additional   resources   to  product   development   and
commercialization,  or terminate  certain  development  programs.  The Company's
strategic alliances with Janssen,  Novartis, Lilly, and Wyeth-Ayerst are subject
to termination by Janssen, Novartis, Lilly, or Wyeth-Ayerst, respectively. There
can be no assurance that Janssen,  Novartis,  Lilly,  or  Wyeth-Ayerst  will not
elect  to  terminate  its  strategic  alliance  with  the  Company  prior to its
scheduled expiration.  In addition, if the Company's 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 the Company's  business,  financial  condition and results of
operations.  Neurocrine's  corporate partners may develop,  either alone or with
others,  products  that  compete  with  the  development  and  marketing  of the
Company's  products.  Competing  products,  either  developed  by the  corporate
partners or to which the  corporate  partners  have rights,  may result in their
withdrawal  of  support  with  respect  to all  or a  portion  of the  Company's
technology,  which  would  have a  material  adverse  effect  on  the  Company's
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 between corporate partners and
the Company could lead to delays in the collaborative  research,  development or
commercialization  of certain  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 the  Company's  business,  financial
condition and results of operations.

MANUFACTURING

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

MARKETING, SALES, AND PHARMACEUTICAL PRICING ISSUES

     Neurocrine has retained certain  marketing or co-promotion  rights in North
America to its products under development,  and plans to establish its own North
American  marketing  and  sales  organization.  The  Company  currently  has  no
experience in marketing or selling  pharmaceutical  products and does not have a
marketing  and sales  staff.  In order to  achieve  commercial  success  for any
product  candidate  approved  by the  FDA,  Neurocrine  must  either  develop  a
marketing  and sales  force or enter into  arrangements  with  third  parties to
market and sell its products.  There can be no assurance  that  Neurocrine  will
successfully  develop  such  experience  or that it will be able to  enter  into
marketing and sales  agreements  with others on acceptable  terms, if at all. If
the Company develops its own marketing and sales  capabilities,  it will compete
with other companies that currently have  experienced and well funded  marketing
and sales operations. To the extent that the Company enters into co-promotion or
other marketing and sales arrangements with other companies,  any revenues to be
received by Neurocrine will be dependent on the efforts of others, and there can
be no assurance that such efforts will be successful.

     The  Company's  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 the  Company
expects 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 the Company  receives for
any products it may develop and sell in the future,  and thereby have a material
adverse  effect on the Company's  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  corporate
partners  or  prospective  corporate  partners  for  certain  of  the  Company's
potential  products,  the  Company's  ability  to  commercialize  its  potential
products may be materially adversely affected.

     The Company's 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
developed  by  the  Company.   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 adequate
coverage and reimbursement levels are not provided by government and third party
payors for the Company's products, the market acceptance of these products would
be materially adversely affected.

COMPETITION

     The  biotechnology and  pharmaceutical  industries are subject to rapid and
intense  technological  change.  The Company  faces,  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  the  Company's  product  candidates  or  technologies  obsolete  or
noncompetitive.

     Betaseron and Avonex,  similar forms of beta-interferon  marketed by Berlex
BioSciences  and Biogen,  Inc.,  respectively,  and  Copaxone a peptide  polymer
marketed by Teva,  have been approved for the marketing in the United States and
certain  other  countries  for the  treatment  of relapsing  remitting  multiple
sclerosis.  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  developed by the
Company  for these  indications.  The  Company is  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.
Certain technologies under development by other  pharmaceutical  companies could
result in treatments for these and other diseases and disorders being pursued by
the Company.  For  example,  a number of companies  are  conducting  research on
molecules to block CRF to treat anxiety and depression.  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 the Company's products may be reduced or eliminated.

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

PATENTS AND PROPRIETARY RIGHTS

     The Company  files  patent  applications  both in the United  States and in
foreign countries,  as it deems  appropriate,  for protection of its proprietary
technology and products.  As of December 31, 1998, 4 patents have been issued to
the Company;  and the Company has  received  licenses to 5 issued  patents.  The
Company  owns or has  exclusive  rights to a total of  approximately  122 patent
applications   pursuant  to  license   agreements  with  academic  and  research
institutions,  including the Beckman Research Institute of the City of Hope, the
Salk Institute for Biological  Studies,  and Leland Stanford Junior  University.
The Company  intends to file additional  United States and foreign  applications
and  license  additional  technologies  from  third  parties  in the  future  as
appropriate.  However,  there can be no assurances  that licenses to third party
technologies  that may be required  by or  advantageous  to the Company  will be
obtained on commercially reasonable terms or at all.

     The  Company's  success  will  depend  on  its  ability  to  obtain  patent
protection for its products,  preserve its trade secrets,  prevent third parties
from infringing upon its 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, the Company intends to seek
patent protection for its 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 the
Company's proprietary technology or compounds,  or that the Company 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, the Company
cannot be certain that it was the first creator of inventions covered by pending
patent  applications  or that it was the first to file patent  applications  for
such  inventions.  Litigation,  which could  result in  substantial  cost to the
Company, may be necessary to enforce the Company's patent and license rights.

     The degree of patent protection  afforded to  pharmaceutical  inventions is
uncertain and any patents that may issue with regard to the Company's  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 the Company's patents. Other potential products
that the Company may develop may not consist of novel  compounds  and  therefore
would not be covered by composition of matter patent  claims.  In addition,  the
Company is 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 competitors and potential competitors of the Company. There
can be no assurance that the Company's  potential products can be commercialized
without a license to any patents which may issue from such applications.

     The Company 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 the Company's  potential products may give rise
to claims that such products  infringe the patent rights of others. At least one
patent containing  claims covering  compositions of matter consisting of certain
altered  peptide ligand  therapeutics  for use in modulating the immune response
has  issued in  Europe,  and the  Company  believes  that this  patent  has been
licensed to a competitor of the Company. There can be no assurance that a patent
containing  corresponding  claims will not issue in the United States.  Although
the Company is engaged in an opposition  proceeding with respect to the European
patent,  there can be no guarantee  that the Company will be  successful in this
opposition.  Further,  there can be no assurance that the claims of the European
patent or any corresponding  claims of any future United States patents or other
foreign patents which may issue will not be infringed by the manufacture, use or
sale of any  potential  altered  peptide  ligand  therapeutics  developed by the
Company or Novartis.  Although the Company has been granted claims to a European
patent covering altered peptide ligand  therapeutics,  there can be no assurance
that the Company or Novartis would prevail in any legal action  seeking  damages
or  injunctive  relief for  infringement  of any such  claims or any patent that
might issue under such  applications or that any license required under any such
patent  would  be made  available  or,  if  available,  would  be  available  on
acceptable terms. Failure to obtain a required license could prevent the Company
and Novartis from  commercializing any altered peptide ligand products that they
may develop.

     The Company is aware of an issued U.S. patent directed toward an excitatory
amino acid  transporter  included  within the  subject  matter of its  corporate
collaboration with  Wyeth-Ayerst.  Although the Company believes that it will be
found  to have  superior  rights  to this  transporter  through  an  anticipated
interference  proceeding,  there can be no  assurance  that the Company  will be
successful in such an interference.

     In 1998 a patent  application  filed by a third party outside of the United
States pursuant to the Patent Cooperation Treaty was published claiming priority
from a United States patent application and came to the attention of the Company
and   Janssen,    the   Company's    corporate   partner   in   the   field   of
corticotropin-releasing  factor antagonists.  This application claims a genus of
chemical  compounds  that includes the lead product  candidate  currently  under
development by Janssen.  This  application  appears to predate the filing by the
Company and Janssen with respect to such  compound.  The Company and Janssen are
engaged  in  discussions  with  the  third  party  with  regard  to a  licensing
arrangement.  There can be no assurance that such discussions will be successful
or that such a license will be available on  commercially  reasonable  terms. If
the third party's patent application was determined to predate the filing by the
Company and Janssen and were to issue in its current form, Janssen may be unable
to  commercialize  the current lead  compound in the  countries  which the third
party patent issues and may elect to select a new lead clinical candidate. While
the Company  and Janssen  have filed  patent  applications  directed to chemical
compounds not covered by the third party's application,  selection of a new lead
clinical candidate may delay the Company's  realization of milestone and royalty
income under its agreement with Janssen. As noted above, the patent positions of
pharmaceutical  and  biotechnology  companies,  including  the Company,  involve
complex legal and factual  issues.  It is not certain that,  with respect to the
United  States,  the third  party's date of invention  will pre-date that of the
Company,  that outside of the United States the third party's patent application
will be  determined  to predate  filing by the  Company  and Janssen or that the
third  party  application  will  issue as a patent.  In  addition,  if the third
party's patent does  eventually  issue, it is not certain that the form in which
it issues will present an impediment to Janssen's CRF antagonist development and
commercialization  program  or lead to delays in the  Company's  realization  of
milestone and royalty income derived  therefrom.  The Company's  independent CRF
antagonist  program is not impacted  and will  continue  without  regard to this
application.

     No assurance can be given that any licenses  required  under any patents or
proprietary  rights of third parties would be made available on terms acceptable
to the  Company,  or at all. If the Company  does not obtain such  licenses,  it
could  encounter  delays in product  introductions  while it  attempts to design
around such patents, or 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
patents  issued to the Company to protect trade secrets or know-how owned by the
Company,  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 patent  applications of the Company or its licensors.
Litigation or interference  proceedings could result in substantial costs to and
diversion of effort by, and may have a material  adverse impact on, the Company.
In addition,  there can be no assurance  that these efforts by the Company would
be successful.

     The Company also relies upon  unpatented  trade  secrets and  improvements,
unpatented  know-how  and  continuing  technological  innovation  to develop and
maintain  its  competitive  position,  which it seeks to  protect,  in part,  by
confidentiality   agreements  with  its  commercial   partners,   collaborators,
employees and consultants.  The Company also has invention or patent  assignment
agreements with its 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 the Company would
have adequate  remedies for any breach, or that the Company's trade secrets will
not otherwise become known or be independently discovered by competitors.

     As is  commonplace  in the  biotechnology  industry,  the  Company  employs
individuals   who  were   previously   employed   at  other   biotechnology   or
pharmaceutical companies,  including competitors or potential competitors of the
Company.  To the extent such Company employees are involved in research areas at
the  Company  which are  similar to those  areas in which they were  involved at
their former employer,  the Company 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 the Company was successful in
defending such claims.

GOVERNMENT REGULATION

     Regulation  by  government  authorities  in the United  States and  foreign
countries is a significant factor in the development,  manufacture and marketing
of the  Company's  proposed  products  and in its ongoing  research  and product
development  activities.  All of the Company's  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.  Any failure by the
Company or its  collaborators or licensees to obtain,  or any delay in obtaining
or maintaining,  regulatory approval could adversely affect the marketing of any
products  developed  by the Company,  its ability to receive  product or royalty
revenues and its liquidity and capital resources.

     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. In 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.  In 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.  In  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.

     To date,  the  Company  or its  collaborators  have  submitted  five IND or
equivalent  applications in the United States,  Canada and/or Europe with regard
to its product candidates and has commenced clinical trials. Even if Canadian or
European  regulatory  authorities  approve  the  product,  the  Company  will be
required  to  undertake  additional  clinical  testing to obtain FDA  regulatory
approval in the United  States.  No assurance can be given that the Company will
be  able  to  obtain  FDA or  other  governmental  regulatory  approval  for any
products.

     Neurocrine  currently  has  five  programs  in  clinical  development.  The
Company's  CRF  receptor  antagonist  project is  currently in Phase II clinical
development with its partner,  Janssen  Pharmaceutica,  for  anxiety/depression.
Neurocrine  and its partner,  Novartis  Pharmaceuticals,  are  conducting  their
second Phase II clinical trial with  Neurocrine's  APL compound in patients with
multiple  sclerosis.  Neurocrine  is  conducting a Phase I/II trial with an IL-4
Fusion Toxin for  glioblastoma  (malignant  brain tumors).  The Company has also
completed a Phase Ib clinical trial for insomnia and recently  announced that it
commenced  a Phase I  safety  and dose  escalating  clinical  study  for and APL
compound for Type I diabetics.

     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  conducted by the Company or its corporate
partners 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 Company's 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
the Company's business, financial condition and results of operations.

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

     The Company is required to conduct its research  activities  in  compliance
with good laboratory practice  regulations  enforced by FDA. The Company is also
subject  to   various   Federal,   state  and  local   laws,   regulations   and
recommendations  relating to safe working conditions,  laboratory  manufacturing
practices,  and the use and  disposal  of  hazardous  or  potentially  hazardous
substances,  including radioactive compounds and infectious disease agents, used
in connection with the Company's research.  The extent of government  regulation
that might result from future  legislation  or  administrative  action cannot be
predicted accurately.

SCIENTIFIC ADVISORY BOARD

     Neurocrine  has  assembled  a  Scientific  Advisory  Board  that  currently
consists of 16 individuals. Members of the Scientific Advisory Board are leaders
in  the  fields  of  neurobiology,  immunology,  endocrinology,  psychiatry  and
medicinal  chemistry.  Scientific Advisory Board members meet at least yearly to
advise the Company in the selection,  implementation  and  prioritization of its
research  programs.  Certain  members meet more frequently to advise the Company
with regard to its specific programs.

     The  Scientific   Advisory  Board  presently   consists  of  the  following
individuals:

     Susan G. Amara,  Ph.D. a Senior  Scientist and Professor,  Vollum Institute
for Advanced  Biomedical  Research is an expert on the  cellular  and  molecular
biology of  neurotransmitter  transporters,  excitatory  amino acid  transporter
structure and regulation and signaling roles of neurotransmitter transporters.

     Floyd E. Bloom, M.D., is Chairman of the Department of Neuropharmacology at
The Scripps  Research  Institute.  Dr.  Bloom is an  internationally  recognized
expert in the fields of  neuropharmacology  and neurobiology.  He is the current
editor of the journal, Science.

     Michael Brownstein, M.D., Ph.D., is Chief of the Laboratory of Cell Biology
at the  National  Institute  of  Mental  Health.  He is a  recognized  expert in
molecular pharmacology as it applies to the field of  neuroendocrinology,  where
he has defined many of the pharmaceutically important neurotransmitter receptors
and transporter systems.

     Iain  Campbell,  Ph.D.,  is  an  Associate  Member  of  the  Department  of
Neuropharmacology  at The Scripps Research Institute.  Dr. Campbell is an expert
in cytosine activation in autoimmune diseases and neuronal degeneration.

     Roger D.  Cone,  Ph.D.,  a senior  scientist  at the Vollum  Institute  for
Advanced Biomedical  Research,  is an international expert on the neuroendocrine
system,   with  particular   expertise  on  the  melanocortin   system  and  the
hypothalamic control of energy homeostasis.
Dr. Cone is an editor of the journal, Endocrinology.

     George P. Chrousos,  M.D.,  Sc.D., is Chief of the Pediatric  Endocrinology
Section at the National Institute of Child Health and Human Development.  He has
investigated  the role of stress  hormones in  pathological  conditions  such as
Cushing's disease, anxiety-related disorders and rheumatoid arthritis.

     Caleb E. Finch,  Ph.D., is the Arco and William F. Kieschnick  Professor of
Neurobiology  of  Aging  at the  University  of  Southern  California.  He is an
internationally  recognized expert in the field of molecular gerontology and the
genomic control of mammalian  development and aging. His recent work has focused
on the role of cytokines in neuronal protection and aging.

     Stephen M. Hedrick, Ph.D., is Professor and Chairman of Cell Biology at the
University  of  California,  San  Diego.  Dr.  Hedrick  is an  expert  in T cell
immunology and  co-discovered the first T cell receptor genes and identified the
regions  responsible  for  antigen  binding.  He is an editor for the Journal of
Immunology.

     Florian Holsboer,  M.D., Ph.D., is Director at the Max Planck Institute fur
Psychiatrie.   Dr.  Holsboer  is  an   international   expert  on  the  role  of
glucocorticoids   and  neuropeptides,   particularly  CRF,  in  neuropsychiatric
disorders.  He  coordinates  the  efforts  of  several  hundred  scientists  and
clinicians  at the  Max  Planck  Institute,  a major  European  neuropsychiatric
institute.

     George F. Koob,  Ph.D., is a Member of the Department of  Neuropharmacology
at The Scripps Research Institute and an Adjunct Professor in the Departments of
Psychology and Psychiatry at the University of California,  San Diego.  Dr. Koob
is an internationally  recognized behavioral  pharmacology expert on the role of
peptides in the central nervous system, the neurochemical basis of addiction and
in the  development  of preclinical  behavioral  procedures for the screening of
anxiolytic and antidepressant drugs and memory enhancers.

     Phillip  J.  Lowry,  Ph.D.,  is  Professor  and Head of the  Department  of
Biochemistry  and Physiology at the University of Reading in Great Britain.  Dr.
Lowry is an internationally  recognized  biochemical  endocrinologist whose work
has focused on the purification and characterization of some of the key hormonal
mediators  of the  endocrine  response to stress.  Dr.  Lowry is a member of the
European   Neuroscience   Steering   Committee,   the  European   Neuroendocrine
Association and the Committee of British Endocrinology

     Bruce S. McEwen,  Ph.D.,  is Professor  and Head of the Harold and Margaret
Milliken Hatch Laboratory of Neuroendocrinology  at The Rockefeller  University.
Dr. McEwen has  identified and studied the function of  intracellular  receptors
for neuroactive  steroid hormones in the brain and immune system, in relation to
stress and sex  differences.  Dr.  McEwen is also  President  of the Society for
Neuroscience.

     Charles  B.  Nemeroff,  M.D.,  Ph.D.,  is  Chairman  and  Professor  of the
Department of Psychiatry and Behavioral  Sciences at Emory University  School of
Medicine. Dr. Nemeroff is an internationally recognized expert on the effects of
neuropeptides on behavior and their relevance in clinically important conditions
such as  depression,  anxiety  and  schizophrenia,  and has  published  over 400
articles on this subject.

     Thomas Roth,  Ph.D., is the Head of the Division of Sleep Disorder Research
at the Henry Ford Hospital Research  Institute.  Dr. Roth is an  internationally
recognized  expert in the field of sleep research.  His areas of  specialization
are sleep homeostasis and neuropharmacology of sleep.

     Lawrence J. Steinman, M.D., is Chief Scientific Advisor, Neuroimmunology of
the  Company  and a member of  Neurocrine's  Founding  Board of  Scientific  and
Medical Advisors and its Executive Committee.

     Wylie W. Vale, Ph.D., is Chief Scientific  Advisor,  Neuroendocrinology  of
the  Company  and a member of  Neurocrine's  Founding  Board of  Scientific  and
Medical Advisors and its Executive Committee. See "Item 10 -- Executive Officers
and Directors of the Registrant."

     Stanley J. Watson,  Jr., M.D.,  Ph.D., is Professor and Associate Chair for
Research in the  Department of Psychiatry  and  Co-Director of the Mental Health
Research  Institute at the  University  of Michigan.  Dr. Watson is a recognized
expert in  neuropeptides  and their  receptors  and  their  role in  psychiatric
diseases and behavior.  Dr. Watson is also a member of the Institute of Medicine
of the National Academy of Sciences.

     Each of the members of the Scientific Advisory Board have signed consulting
agreements that contain  confidentiality  provisions and restrict the members of
the  Scientific  Advisory  Board from competing with the Company for the term of
the agreement.  Each member of the Scientific  Advisory Board receives  either a
per diem  consulting  fee or a retainer fee. Each member also has received stock
or stock  options  in the  Company,  which vest over  time.  All  members of the
Scientific  Advisory  Board are full-time  employees of a university or research
institute  that has  regulations  and  policies  which limit the ability of such
personnel  to act as  part-time  consultants  or in  other  capacities  for  any
commercial  enterprise,  including the Company. A change in these regulations or
policies could  adversely  affect the  relationship  of the Scientific  Advisory
Board member with the Company.

INSURANCE

     The Company maintains product liability  insurance for clinical trials. The
Company  intends  to  expand  its  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
no assurance  can be given that the Company  will be able to maintain  insurance
coverage at a reasonable  cost or in  sufficient  amounts to protect the Company
against losses due to liability. There can also be no assurance that the Company
will be able to obtain  commercially  reasonable product liability insurance for
any products  approved for marketing.  A successful  product  liability claim or
series of claims  brought  against  the  Company  could have a material  adverse
effect on its business, financial condition and results of operations.

EMPLOYEES


     As of December 31, 1998, the Company had 149  employees,  consisting of 135
full-time and 14 part-time employees. Of the full-time employees, 46 hold Ph.D.,
M.D., or equivalent degrees.  None of the Company's employees are represented by
a collective bargaining  arrangement,  and the Company believes its relationship
with its  employees is good.  The Company is highly  dependent on the  principal
members of its management and scientific  staff.  The loss of services of any of
these  personnel  could  impede the  achievement  of the  Company's  development
objectives. Furthermore, recruiting and retaining qualified scientific personnel
to perform  research and development work in the future will also be critical to
the Company's  success.  There can be no assurance that the Company will be able
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,  the
Company  relies on members of its  Scientific  Advisory  Board and a significant
number of  consultants  to assist the Company in  formulating  its  research and
development strategy.


ITEM 2.  PROPERTIES


     The  Company  leases  approximately  93,000  square  feet of  space  at its
headquarters  facility,  of which  approximately  80% is  laboratory  facilities
dedicated to research and development.  The facility was constructed in 1998 and
is under lease through August 2013. The Company has sublet  approximately 13,000
square feet of this  facility  through  August 2000.  In  addition,  the Company
leases  approximately  19,000 square feet of laboratory and office space,  which
has been sublet to a third party. The lease and sublease on this property expire
in June 2000. The Company's facilities are located in San Diego, California.


     The Company  believes that its property and  equipment  are generally  well
maintained, in good operating condition and adequate for its current needs.


ITEM 3.  LEGAL PROCEEDINGS


     Not Applicable.


ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

     Not Applicable.


                                     PART II


ITEM 5.  MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

     The Company's  Common Stock has been traded on the Nasdaq  National  Market
System under the symbol NBIX since the Company's  initial public offering on May
23, 1996. Prior to that time there was no established  public trading market for
the  Company's  Common  Stock.  The  following  table sets forth for the periods
indicated  the high and low sale price for the Common  Stock as  reported by the
Nasdaq National Market. These prices do not include retail markups, markdowns or
commissions.
                                1998                        1997
                    -------------------------   -------------------------
                        High         Low            High         Low
                    -------------------------   -------------------------
  1st Quarter ........$ 10.13      $ 7.56         $ 13.25      $ 8.63
  2nd Quarter ........   9.06        7.38           10.50        7.00
  3rd Quarter ........   8.13        4.00           10.75        7.88
  4th Quarter ........   8.00        4.13           11.88        7.50

     As of March 15, 1999, there were  approximately  211 stockholders of record
of the Company's  Common Stock.  The Company has not paid any cash  dividends on
its  Common  Stock  since its  inception  and does not  anticipate  paying  cash
dividends in the foreseeable future.


ITEM 6.  SELECTED FINANCIAL DATA

     The following  selected financial data have been derived from the Financial
Statements of the Company,  which have been audited by Ernst & Young LLP,  whose
reports appear elsewhere herein. The information  presented below should be read
in  conjunction  with the  Company's  Financial  Statements  and  Notes  thereto
included elsewhere in this Form 10-K. See "Management's  Discussion and Analysis
of Financial Condition and Results of Operations."

     The following  tables set forth certain  financial data with respect to the
Company (in  thousands,  except per share  data).  The selected  financial  data
should be read in conjunction  with the  consolidated  financial  statements and
notes thereto.
<TABLE>
<CAPTION>
                                                                           Year Ended December 31,
                                                    -----------------------------------------------------------
                                                         1998(1)      1997        1996       1995        1994  
                                                    -----------------------------------------------------------
<S>                                                    <C>          <C>         <C>       <C>         <C>  
STATEMENT OF OPERATIONS DATA
Revenues
      Sponsored research and development ...........   $  8,751    $ 14,985    $  9,092    $  3,000    $     --
      Sponsored research and development from
          related party ............................      3,610          --          --          --          --
      Milestones and license fees ..................      2,500      10,250       9,000       2,750          --
      Grant income and other revenues ..............      1,176         909       1,124         356         162
                                                       ---------------------------------------------------------
      Total revenues ...............................     16,037      26,144      19,216       6,106         162
Operating expenses
      Research and development .....................     21,803      18,758      12,569       7,740       6,231
      General and administrative ...................      6,594       5,664       3,697       2,728       2,223
      Write-off of acquired in-process research
          and development and licenses .............      4,910          --          --          --          --
                                                        --------------------------------------------------------
      Total operating expenses .....................     33,307      24,422      16,266      10,468       8,454
Income (loss) from operations ......................    (17,270)      1,722       2,950      (4,362)     (8,292)
      Interest income, net .........................      4,000       3,931       2,598         839         627
      Other income (expense) .......................        504         818         574         177         (41)
      Equity in NPI net losses and other adjustments     (7,188)     (1,130)         --          --          --
                                                        --------------------------------------------------------
Net income (loss) before income taxes ..............    (19,954)      5,341       6,122      (3,346)     (7,706)
      Income taxes .................................          1         214         248          --          --
                                                        --------------------------------------------------------
Net income (loss) ..................................   $(19,955)   $  5,127    $  5,874    $ (3,346)   $ (7,706)
                                                        ========================================================
Earnings per shares
      Basic ........................................   $  (1.10)   $   0.30    $   0.39    $  (0.29)   $  (0.70)
      Diluted ......................................   $  (1.10)   $   0.28    $   0.36    $  (0.29)   $  (0.70)
Shares used in calculation of earnings per share
      Basic ........................................     18,141      16,930      14,971      11,684      10,933
      Diluted ......................................     18,141      18,184      16,127      11,684      10,933

BALANCE SHEET DATA
Cash, cash equivalents and short-term investments(2)     62,670      75,092      69,920      18,696      18,228
Total assets .......................................     80,529      91,903      77,957      24,012      22,344
Long-term debt and capital lease obligations .......      2,247         722         847       1,631       1,733
Accumulated deficit ................................    (24,850)     (4,895)    (10,022)    (15,895)    (12,549)
Total stockholders' equity .........................     71,958      83,152      72,767      19,225      18,743
- ----------------------------------------------------------------------------------------------------------------
<FN>
(1)  Includes  results  of  operations  and  financial   position  of  Northwest
     NeuroLogic,  Inc. from May 28, 1998, the date of acquisition (See Note 2 of
     the Notes to the Consolidated Financial Statements).

(2)  Excludes  funds  held by NPI,  which is  available  to fund  certain of the
     Company's research and development activities.
</FN>
</TABLE>


     ITEM 7.  MANAGEMENT'S  DISCUSSION  AND ANALYSIS OF FINANCIAL  CONDITION AND
RESULTS OF OPERATIONS

     The following  Management's  Discussion and Analysis of Financial Condition
and Results of Operations of Neurocrine  Biosciences,  Inc. ("Neurocrine" or the
"Company"),  as well as the  preceding  sections of this  Annual  Report on Form
10-K, contain forward-looking  statements which involve risks and uncertainties,
pertaining generally to the expected continuation of the Company's collaborative
agreements,  the receipt of research payments thereunder, the future achievement
of various milestones in product development and the receipt of payments related
thereto,  the  potential  receipt of royalty and  profit-sharing  payments,  the
anticipated dates of commencement of selection of development candidates and the
commencement of clinical  trials,  the successful  continuation of the Company's
research  and  development  programs  and the  potential  development  of future
products,  the period of time the Company's existing capital resources will meet
its funding  requirements,  and the Company's  financial  results of operations.
Actual  results  could  differ   materially  from  those   anticipated  in  such
forward-looking  statements as a result of various factors,  including those set
forth below, and those outlined in the Business section of Item 1.


Overview

     Since the  founding of the  Company in January  1992,  Neurocrine  has been
engaged in the discovery and  development of novel  pharmaceutical  products for
diseases  and  disorders  of the central  nervous and immune  systems.  To date,
Neurocrine  has not generated  any revenues from the sale of products,  and does
not expect to generate any product  revenues  for the  foreseeable  future.  The
Company's revenues are expected to come from its strategic alliances. Neurocrine
has incurred a cumulative  deficit of  approximately  $25 million as of December
31, 1998 and expects to incur additional  operating losses in the future,  which
are potentially greater than losses in prior years.


Results of Operations

     The  Company's   revenue  from   collaborative   research  and  development
agreements  was $16.0 million for the year ended December 31, 1998 compared with
$26.1 million in 1997,  and $19.2 million in 1996.  The decline in 1998 revenues
compared to 1997 revenues resulted  primarily from  non-recurring  1997 revenues
related to the  completion  of the  sponsored  research  portion of the  Janssen
collaboration,  a one-time research support payment received under the Eli Lilly
collaboration,  sponsored  development  payments  received  under  the  Novartis
collaboration and the timing of milestone  achievements received under all three
collaborations.  Revenues in 1998 included $3.6 million of sponsored development
received  from the  Company's  Canadian  affiliate,  NPI.  The  increase in 1997
revenues  compared to 1996 revenues  resulted  primarily to increased  sponsored
research,  license fees and  milestone  revenues  recognized  under the Janssen,
Novartis and Eli Lilly collaborations.

     Research and  development  expenses  increased to $21.8 million during 1998
compared with $18.8 million in 1997 and $12.6 million in 1996.  These  increases
reflect higher costs  associated  with the addition of scientific  personnel and
costs to advance  compounds into  preclinical and clinical  trials.  The Company
expects  to incur  significant  increases  in future  periods as  compounds  are
advanced through the clinical development process.

     General and  administrative  expenses increased to $6.6 million during 1998
compared  with $5.7  million in 1997 and $3.7 million in 1996.  These  increases
resulted   primarily  from   additional   administrative   personnel,   business
development and professional  service expenses to support the expanded  clinical
development  efforts.  The Company  anticipates  slight increases in general and
administrative  expenses  over  the next few  years  as the  Company's  clinical
efforts continue to expand.

     During  1998,  the  Company  wrote-off  acquired  in-process  research  and
development costs of $4.9 million. In May 1998, the Company acquired the assets,
liabilities and the in-process  research and  development  programs of Northwest
NeuroLogic,  Inc.  ("NNL") in  exchange  for  Company's  Common  Stock and stock
options valued at $4.2 million. The acquired in-process research and development
consisted of  Melanocortin  ("MCR"),  a brain  receptor  technology  relating to
obesity and Excitatory Amino Acid Transporters  ("EAATs"), a technology relating
to  neurodegeneration  and stroke. In June 1998, the Company purchased  licenses
for the use of technology in programs  relating to insomnia  ("NBI-34060")  from
DOV  Pharmaceuticals  and brain cancer ("IL-4  Fusion  Toxin") from the National
Institute  of  Health  for  $710,000.   The  acquired  in-process  research  and
development  projects and the licensed  technologies  are in the early stages of
development,  have  not  reached  technological  feasibility  and  have no known
alternative uses.

     The nature and efforts required to develop the acquired in-process research
and development  into  commercially  viable products  include  completion of the
development  stages of a  compound,  pre-clinical  development,  clinical  trial
testing,  FDA  approval  and  commercialization.   Due  to  the  nature  of  the
pharmaceutical   development   process,   the  Company   anticipates   incurring
substantial costs to develop the compounds into products.  However,  there is no
certainty  that any of these  development  efforts  will result in  commercially
viable  products.  During the  upcoming  fiscal  year,  the Company  anticipates
research and development  expenditures  of $2.8 million for EAATs,  $1.7 million
for MCR, $6.1 million for IL-4 Fusion Toxin and $5.0 million for NBI-34060.

     The  value  of  the  acquired   in-process  research  and  development  was
determined by estimating  the projected net cash flows related to such products,
including  costs to complete the  development,  and future revenues to be earned
upon commercialization of the products. These cash flows were discounted back to
their net present value using a discount factor of 35%. The resulting  projected
net cash  flows  from such  projects  were based on  management's  estimates  of
revenues  and  operating  profits  related  to such  projects.  Management  also
reviewed the probability of product success,  which were estimated using certain
probability factors for each stage of development.

     Interest  income  increased to $4.2 million  during 1998 compared with $4.1
million for 1997 and $2.9  million in 1996.  The  increase  over 1997  primarily
resulted  from higher  effective  interest  yields on the  Company's  investment
portfolio  during 1998.  The increase over 1996  primarily  resulted from higher
effective interest yields in addition to higher average cash balances throughout
the year.  Management  anticipates  lower  interest  income in future periods as
clinical  efforts  increase  operating   requirements  and  cash  available  for
investment declines.

     Equity in NPI losses recorded in 1998 were $3.4 million  compared with $1.1
million  in 1997.  In  addition  to the equity in NPI losses  during  1998,  the
Company  recorded a write-down in the value of its  investment in NPI,  totaling
$3.8 million.

     Net loss for 1998 was $20.0  million  or $1.10 per  share  compared  to net
income of $5.1 million or $0.30 per share for 1997 and $5.9 million or $0.39 per
share in 1996.  Management  expects  to incur  substantial  operating  losses in
future periods as its clinical development efforts continue to grow.

     To date, the Company's  revenues have come principally from funded research
and  achievements of milestones under corporate  collaborations.  The nature and
amount  of  these  revenues  from  period  to  period  may  lead to  substantial
fluctuations in the results of year-to-date revenues and earnings.  Accordingly,
results and earnings of one period are not predictive of future periods.

LIQUIDITY AND CAPITAL RESOURCES

     As of  December  31,  1998,  the  Company had cash,  cash  equivalents  and
short-term  investments  of $62.7 million.  The Company  invests its excess cash
primarily in investment  grade debt  instruments,  marketable debt securities of
U.S.  government  agencies  and  high-grade  commercial  paper.  Management  has
established  guidelines relative to diversification and maturities that maintain
safety and liquidity.  The primary market risk associated with such  investments
is  vulnerability  to changes in short-term  and long-term  U.S.  prime interest
rates. For further information regarding the Company's investments,  see Notes 1
and 3 of the Notes to the Consolidated Financial Statements.

     Net  cash  used by  operating  activities  during  1998 was  $10.7  million
compared  with net cash  provided of $11.0  million in 1997 and $6.7  million in
1996.  The increase in cash used in  operations  during 1998 compared with 1997,
resulted  primarily from  increased  sponsored  research and milestone  revenues
received under the Company's  collaborations during 1997 and an increase in 1998
operating expenses as the Company expands its clinical  development  activities.
The increase in cash provided during 1997 compared with 1996, resulted primarily
from  increased  sponsored  research and milestone  revenues  received under the
Company's collaborations during 1997.

     Net cash  provided by  investing  activities  during 1998 was $4.7  million
compared  with net cash used of $7.2 million and $48.6 million in 1997 and 1996,
respectively.  The cash  provided by investing  activities  during 1998 resulted
primarily  from  sales of  short-term  investments.  The cash used in  investing
activities  during  1997  and 1996  resulted  from the  purchase  of  short-term
investments  with proceeds from the Company's  prior  financings and the sale of
Common Stock to corporate collaborators.

     Net cash  provided by  financing  activities  during 1998 was $1.9  million
compared  with $659,000 and $46.8  million  during 1997 and 1996,  respectively.
Cash provided  during 1998 resulted from proceeds  received  under capital lease
financing of equipment  purchases.  Cash provided  during 1997 resulted from the
issuance of the  Company's  Common Stock upon the exercises of stock options and
warrants and proceeds  received from a note payable used to finance the purchase
of land.  Cash provided  during 1996  resulted  from proceeds  received from the
Company's  initial  public  offering and sale of the  Company's  Common Stock to
corporate collaborators in May 1996.

     Neurocrine has primarily  financed its operations through proceeds received
from the sale of its Common Stock in various  private and public  offerings,  as
well as revenues received under corporate collaborations.

     In February  1995,  the  Company  entered  into a three year  collaborative
research  and  development  agreement  with Janssen for the  development  of CRF
receptor  antagonists  for the  treatment of anxiety,  depression  and substance
abuse.  Janssen paid the Company  $3.7  million and $3.0  million for  sponsored
research  during  1997  and  1996,  respectively.   Milestone  payments  totaled
$250,000,   $1.5  million  and  $1.0  million   during  1998,   1997  and  1996,
respectively.  The collaborative research portion of the agreement was completed
as  scheduled  in 1997  with  the  selection  of a  clinical  candidate  and the
commencement of clinical  trials in Europe.  The Company may continue to receive
milestone  payments  and  royalties  upon  the  successful  continuation  of the
development portion of the agreement.

     In January  1996,  the Company  entered into an agreement  with Novartis to
develop  altered  peptide  ligands  for the  treatment  of  multiple  sclerosis.
Novartis  paid the Company for license fees and research  funding  totaling $4.5
million,  $7.2  million  and $8.5  during  1998,  1997 and  1996,  respectively.
Milestone payments were $2.3 million, $3.8 million and $3.0 million during 1998,
1997 and 1996, respectively.

     In March 1996, the Company  participated in the formation of a research and
development company, Neuroscience Pharma, Inc. ("NPI"), with a group of Canadian
investors.  At the same time,  the Company  entered  into a  sponsored  research
agreement with NPI. The terms of the agreement called for NPI to fund additional
research  efforts on technologies  licensed to NPI by the Company.  During 1998,
the  Company  recognized  $3.6  million  in  revenues  associated  with costs of
research on the Neurogenomics and DHEA programs.

     In May 1997,  the Company  purchased  two  adjacent  parcels of land in San
Diego for  approximately  $5.0  million in cash.  One parcel was sold to Science
Park Center,  LLC. ("LLC"),  of which the Company owns a minority  interest,  in
exchange  for a note  receivable  of $3.5 million plus  interest.  However,  for
accounting purposes,  this transaction does not qualify as a sale under SFAS No.
98 and therefore,  the entire amount of the note receivable is included in land.
The amount  included in land at December  31, 1998 and 1997 was $3.8 million and
$3.5  million,  respectively.  During  1998,  the LLC  constructed  an  expanded
laboratory  and office  complex on the  property  and leased the facility to the
Company under a 15 year operating  lease. The Company has the option to purchase
the facility at any time during the lease at a predetermined  price. The Company
will hold the remaining  parcel until such time as the Company's growth requires
additional expansion.

     The Company  believes that its existing  capital  resources,  together with
interest income and future payments due under the strategic  alliances,  will be
sufficient to satisfy its current and projected  funding  requirements  at least
through the year 2000.  However,  no  assurance  can be given that such  capital
resources   and  payments  will  be  sufficient  to  conduct  its  research  and
development programs as planned. The amount and timing of expenditures will vary
depending upon a number of factors, including progress of the Company's research
and development programs.


INTEREST RATE RISK

     The  Company is exposed to changes in  interest  rates  primarily  from its
investments in certain  available-for-sale  securities and secondarily  from its
long-term debt.  Under its current  policies,  the Company does not use interest
rate derivative instruments to manage exposure to interest rate changes.

     The Company's  investments are primarily in fixed income,  investment-grade
securities and are not restricted.  The investment  policy  emphasizes return on
principal and liquidity and is focused on fixed returns,  which limit volatility
and risk of principal.  At December 31, 1998, the Company had available-for-sale
securities of $51.0 million. Interest risk exposure on long-term debt relates to
the Company's  note payable which bears of floating  interest rate of prime plus
one quarter percent (8.00% at December 31, 1998). At December 31, 1998, the note
balance  was  approximately  $610,000,  payable  in equal  monthly  installments
through January 2003. The Company  believes that a hypothetical  100 basis point
adverse move in interest rates along the entire  interest rate yield curve would
not materially effect the fair value of interest sensitive financial instruments
nor the costs associated with the long-term debt.


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 the Company's
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.

     Based on recent  assessments,  the Company  determined  that it will not be
required to modify or replace  significant  portions of hardware and software so
that those systems will properly  utilize  dates beyond  December 31, 1999.  The
Company presently  believes that with  modifications and replacement of existing
hardware and software,  the Year 2000 Issue can be mitigated.  However,  if such
modifications  and replacements are not made, or are not completed  timely,  the
Year 2000 Issue could have a material impact on the operations of the Company.

     The  Company's  plan to resolve the Year 2000 Issue  involves the following
four phases: assessment,  remediation,  testing, and implementation. To date the
Company  has  fully  completed  its  assessment  of all  systems  that  could be
significantly affected by the Year 2000. The completed assessment indicated that
most of the Company's significant  information  technology systems are Year 2000
compliant.  That assessment did,  however,  indicated that software and hardware
(embedded  chips)  used in some  scientific  equipment  were at  risk.  Affected
systems include several robotics  systems used for high  through-put  screening.
The Company is currently  assessing cost  comparisons on whether to remediate or
replace this equipment and expects to have the equipment corrected and re-tested
by May 1,  1999.  The  Company  has  gathered  information  about  the Year 2000
compliance status of its significant  suppliers and contractors and continues to
monitor their compliance.

     For its  information  technology  exposures,  to date  the  Company  is 99%
complete on the remediation phase and expects to complete software reprogramming
and replacement no later than April 15, 1999. To date, the Company has completed
100% of its testing and has  implemented  90% of its remediated  systems for its
scientific  equipment.  The  remediation  phase for all  significant  systems is
expected to be complete by May 1, 1999, with all remediated systems fully tested
by June 1, 1999.

     The Company has queried its important suppliers and contractors that do not
share  information  systems with the Company  (external  agents).  To date,  the
Company is not aware of any external agent Year 2000 issue that would materially
impact the company's  results of operations,  liquidity,  or capital  resources.
However,  the Company has no means of ensuring that external agents will be Year
2000  ready.  The  inability  of  external  agents to  complete  their Year 2000
resolution process in a timely fashion could materially impact the Company.  The
effect of non-compliance by external agents is not determinable.

     The Company will utilize both internal and external resources to reprogram,
or replace,  test and implement the software and  scientific  equipment for Year
2000  modifications.  The total cost of the Year 2000  project is  estimated  at
approximately $175,000 and is being funded through operating cash flows and
capital  equipment  financing.  To date, the Company has incurred  approximately
$100,000 related to all phases of the Year 2000 project.  Of the total remaining
project  costs,  approximately  $40,000 is  attributable  to the purchase of new
software, $25,000 for new scientific equipment,  which will be capitalized,  and
$10,000 for the repair of hardware and software.

     The Company  plans to  complete  the Year 2000  modifications  are based on
management's best estimates,  which were derived utilizing numerous  assumptions
of future events  including  continued  availability of certain  resources,  and
other factors. Estimates on the status of completion and the expected completion
dates are based on costs  incurred  to date  compared to total  expected  costs.
However,  there can be no guarantee  that these  estimates  will be achieved and
actual results could differ  materially from those plans.  Specific factors that
might  cause such  material  differences  include,  but are not  limited to, the
availability  and cost of personnel  trained in this area, the ability to locate
and correct all relevant computer codes, and similar uncertainties.

     The Company has not completed a formal contingency plan for non-compliance,
but it is developing a plan based on the information obtained from third parties
and an on-going evaluation of the Company's own systems. The Company anticipates
having a contingency plan in place by mid-1999,  which will include  development
of  backup  procedures,  identification  of  alternate  suppliers  and  possible
increases in supplies  inventory levels. The Company has not identified its most
reasonably  likely  worst  case  scenario  with  respect to  possible  losses in
connection with Year 2000 related problems. The Company plans on completing this
analysis in mid-1999.

     The  information  above  contains  forward-looking   statements  including,
without  limitation,  statements  relating to the Company's  plans,  strategies,
objectives,  expectations,  intentions,  and  adequate  resources  that are made
pursuant to the "safe harbor"  provisions of the Private  Securities  Litigation
Reform Act of 1995. Readers are cautioned that forward-looking  statements about
the Year 2000 should be read in conjunction with the Company's disclosures under
the heading: "Caution on forward-looking statements".


CAUTION ON FORWARD-LOOKING STATEMENTS

     The Company's business is subject to significant  risks,  including but not
limited  to, the risks  inherent in its  research  and  development  activities,
including the successful continuation of the Company's strategic collaborations,
the  successful  completion  of clinical  trials,  the  lengthy,  expensive  and
uncertain process of seeking regulatory approvals, uncertainties associated both
with the  potential  infringement  of patents  and other  intellectual  property
rights of third  parties,  and with  obtaining and enforcing its own patents and
patent rights, uncertainties regarding government reforms and of product pricing
and reimbursement  levels,  technological change and competition,  manufacturing
uncertainties  and  dependence on third parties.  Even if the Company's  product
candidates appear promising at an early stage of development, they may not reach
the market for numerous reasons. Such reasons include the possibilities that the
product will be  ineffective  or unsafe  during  clinical  trials,  will fail to
receive necessary  regulatory  approvals,  will be difficult to manufacture on a
large  scale,  will  be  uneconomical  to  market  or  will  be  precluded  from
commercialization by proprietary rights of third parties.

     Neurocrine  will require  additional  funding for the  continuation  of its
research and product development programs, for progress with preclinical testing
and clinical  trials,  for  operating  expenses,  for the pursuit of  regulatory
approvals  for its  product  candidates,  for the costs  involved  in filing and
prosecuting  patent  applications and enforcing or defending  patent claims,  if
any, the cost of product  in-licensing  and any possible  acquisitions,  and may
require  additional   funding  for  establishing   manufacturing  and  marketing
capabilities in the future. The Company may seek to access the public or private
equity markets  whenever  conditions  are  favorable.  The Company may also seek
additional funding through strategic  alliances and other financing  mechanisms,
potentially  including  off-balance  sheet financing.  There can be no assurance
that adequate funding will be available on terms  acceptable to the Company,  if
at all.  If  adequate  funds are not  available,  the Company may be required to
curtail  significantly  one or more of its research or  development  programs or
obtain funds through  arrangements with collaborative  partners or others.  This
may require the Company to relinquish  rights to certain of its  technologies or
product candidates.

     Continued profitability is not expected as the Company's operating expenses
are anticipated to rise significantly in future periods as products are advanced
through the various development and clinical stages. Neurocrine expects to incur
additional  operating  expenses  over the next  several  years as its  research,
development,  preclinical testing and clinical trial activities increase. To the
extent  that the  Company  is unable  to obtain  third  party  funding  for such
expenses,  the Company expects that increased  expenses will result in increased
losses from  operations.  There can be no assurance that the Company's  products
under  development  will be  successfully  developed  or that its  products,  if
successfully developed,  will generate revenues sufficient to enable the Company
to earn a profit.


ITEM 7A.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

     Quantitative and Qualitative  Disclosures about Market Risk is contained in
Item 7. Management  Discussion and  Analysis--Interest  Rate Risk, on page 26 of
this report.


ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTAL DATA

     See the list of the  Company's  Financial  Statements  filed with this Form
10-K under Item 14 below.


ITEM 9. CHANGES IN AND  DISAGREEMENTS  WITH  ACCOUNTANTS  ON ACCOUNTING AND
        FINANCIAL DISCLOSURE

     Not Applicable.


                                    PART III


ITEM 10.  EXECUTIVE OFFICERS AND DIRECTORS OF THE REGISTRANT

     Information required by this item will be contained in the Company's Notice
of 1999  Annual  Meeting  of  Stockholders  and  Proxy  Statement,  pursuant  to
Regulation 14A, to be filed with the Securities and Exchange  Commission  within
120 days after December 31, 1998.  Such  information is  incorporated  herein by
reference.


ITEM 11.  EXECUTIVE COMPENSATION

     Information required by this item will be contained in the Company's Notice
of 1999  Annual  Meeting  of  Stockholders  and  Proxy  Statement,  pursuant  to
Regulation 14A, to be filed with the Securities and Exchange  Commission  within
120 days after December 31, 1998.  Such  information is  incorporated  herein by
reference.


ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     Information required by this item will be contained in the Company's Notice
of 1999  Annual  Meeting  of  Stockholders  and  Proxy  Statement,  pursuant  to
Regulation 14A, to be filed with the Securities and Exchange  Commission  within
120 days after December 31, 1998.  Such  information is  incorporated  herein by
reference.


ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     Information required by this item will be contained in the Company's Notice
of 1999  Annual  Meeting  of  Stockholders  and  Proxy  Statement,  pursuant  to
Regulation 14A, to be filed with the Securities and Exchange  Commission  within
120 days after December 31, 1998.  Such  information is  incorporated  herein by
reference.


                                     PART IV


ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K

(a) Documents filed as part of this report
           1.   List of Financial Statements. The following financial statements
                of Neurocrine Biosciences, Inc. and Report of Ernst & Young LLP,
                Independent Auditors, are included in this report:
                Report of Ernst & Young LLP, Independent  Auditors  Consolidated
                Balance Sheet as of December 31, 1998 and 1997
                Consolidated   Statement  of  Operations  for  the  years  ended
                December  31,  1998,  1997 and 1996  Consolidated  Statement  of
                Stockholders' Equity for the years ended December 31, 1998, 1997
                and 1996  Consolidated  Statement  of Cash  Flows  for the years
                ended December 31, 1998, 1997 and 1996 Notes to the Consolidated
                Financial Statements

           2.   List of all  Financial  Statement  schedules.  All schedules are
                omitted   because  they  are  not  applicable  or  the  required
                information is shown in the Consolidated Financial Statements or
                notes thereto.


           3. List of Exhibits  required by Item 601 of Regulation S-K. See part
              (c) below.

(b) Reports on Form 8-K.  No reports on Form 8-K were filed  during the quarter
ended December 31, 1998.

(c) Exhibits.  The following exhibits are filed as part of, or incorporated
by reference into, this report:

<TABLE>
<CAPTION>
Exhibit
Number           Description
- ------------------------------------------------------------------------------------------------------------------------
<S>             <C>                                            
2.1             Agreement and Plan of Reorganization dated May 1, 1998, between Northwest NeuroLogic, Inc. NBI
                Acquisition Corporation and the Registrant (7)
2.2*            Registration Rights Agreement dated May 28, 1998, between certain investors and the Registrant (7)
2.3             Form of Warrant pursuant to the Agreement and Plan of Reorganization dated May 1, 1998. (7)
3.1             Restated Certificate of Incorporation (1)
3.2             Bylaws (1)
3.3             Certificate of Amendment of Bylaws (1)
4.1             Form of Lock-Up Agreement (1)
4.2             Form of Common Stock Certificate (1)
4.3             Form of warrant issued in existing warrant holders (1)
4.4             Form of Series A warrant issued in connection with the execution by the Company of the Unit Purchase
                Agreement (see below) (1)
4.5             New Registration Rights Agreement dated March 29, 1996 among the Company and the investors signatory
                thereto (1)
4.6             Letter of Intent between Northwest NeuroLogic, Inc. and the Company dated February 27, 1998 (2)
10.1            Purchase and Sale Agreement and Escrow Instructions between MS Vickers II, LLC and the Company dated
                February 13, 1997 (3)
10.2            1992 Incentive Stock Plan, as amended
10.3            1996 Employee Stock Purchase Plan (1)
10.4            1996 Director Stock Option Plan and form of stock option agreement (1)
10.5            Form of Director and Officer Indemnification Agreement (1)
10.6            Employment Agreement dated March 1, 1997,  between the Registrant and Gary A. Lyons, as amended (4) 
10.7            Employment Agreement dated March 1, 1997, between the Registrant and Errol B. De Souza, as amended (4) 
10.8            Employment Agreement dated  March  1,  1997,  between  the  Registrant and Paul W. Hawran  (4) 
10.9            Employment Agreement dated March 1, 1997,  between the  Registrant and Stephen Marcus, MD (4) 
10.10           Consulting Agreement dated September 25, 1992, between the Registrant and Wylie A. Vale,  Ph.D. (1) 
10.11           Consulting Agreement effective January 1, 1992,  between the Registrant and Lawrence J. Steinman,  MD (1) 
10.12           Lease Agreement dated June 1, 1993, between the Registrant and Hartford Accident and Indemnity Company, 
                as amended (1)
10.13           Exclusive License Agreement dated as of July 1, 1993, by and between the Beckman Research Institute of
                the City of Hope and the Registrant covering the treatment of nervous system degeneration and
                Alzheimer's disease (1)
10.14           Exclusive  License  Agreement  dated as of July 1, 1993,  by and between the Beckman  Research  Institute 
                of the City of Hope and the Registrant covering the use of Pregnenolone for the enhancement of memory (1)
10.15           License Agreement dated May 20, 1992, by and between The Salk Institute for Biological Studies and the
                Registrant (1)
10.16           License Agreement dated July 17, 1992, by and between The Salk Institute for Biological Studies and
                the Registrant (1)
10.17           License Agreement dated November 16, 1993, by and between The Salk Institute for Biological Studies
                and the Registrant (1)
10.18           License Agreement dated October 19, 1992, by and between the Board of Trustees of the Leland Stanford
                Junior University and the Registrant (1)
10.19           Agreement dated January 1, 1995, by and between the Registrant and Janssen Pharmaceutica,  N.V. (1) 
10.20           Letter Agreement dated January 19, 1996, by and between the Registrant and Ciba-Geigy Limited (1) 
10.21*          Unit Purchase Agreement dated March 29, 1996, by and between Neuroscience Pharma, Inc. the Registrant
                and the investors signatory thereto (1)
10.22*          Exchange Agreement dated March 29, 1996, by and between Neurocrine Biosciences (Canada), Inc., the
                Registrant and the investors signatory thereto (1)
10.23*          Research and Development Agreement dated March 29, 1996, by and between Neurocrine Biosciences
                (Canada), Inc. and Neuroscience Pharma, Inc. (1)
10.24*          Intellectual Property and License Grants Agreement dated March 29, 1996, by and between the Registrant
                and Neurocrine Biosciences (Canada), Inc. (1)
10.25*          Development and Commercialization Agreement dated December 20, 1996, by and between Ciba-Geigy Ltd.
                And the Registrant (5)
10.26*          Letter and Purchase  Order dated June 7, 1996, by and between  Ciba-Geigy and the  Registrant (5) 
10.27           Third Lease Amendment dated June 6, 1996, by and between Talcott Realty I Limited Partnership and the
                Registrant (5)
10.28*          Research and License Agreement dated October 15, 1996, between the Registrant and Eli Lilly and
                Company (5)
10.29*          Lease between Science Park Center LLC and the Company (6)
10.30*          Option Agreement between Science Park Center LLC (Optionor) and the Company (Optionee) (6)
10.31*          Construction Loan Agreement (6)
10.32           Secured Promissory Note (6)
10.33*          Operating Agreement for Science Park Center LLC (6)
10.34           Information and Registration Rights Agreement dated September 15, 1992, as amended  to date  (1)  
10.35           Form of incentive stock option agreement and nonstatutory stock option agreement for use in connection
                with 1992 Incentive Stock Plan (1)
10.36*          Patent License Agreement dated May 7, 1998, between the US Public Health Service and the Registrant (7)
10.37*          Patent License Agreement dated April 28, 1998, between and among Ira Pastan, David Fitzgerald and the
                Registrant (7)
10.38*          Sub-License and Development Agreement dated June 30, 1998, by and between DOV Pharmaceutical, Inc. and
                the Registrant (7)
10.39*          Warrant Agreement dated June 30, 1998, between DOV Pharmaceutical, Inc. and the Registrant (7)
10.40*          Warrant Agreement dated June 30, 1998, between Jeff Margolis and the Registrant (7)
10.41*          Warrant Agreement dated June 30, 1998, between Stephen Ross and the Registrant (7)
10.42+          Collaboration and License Agreement dated January 1, 999, by and between American Home Products
                Corporation acting through its Wyeth-Ayerst Laboratories Division and the Registrant
10.43+          Employment Agreement dated January 1, 1999, between the Registrant and Margaret Valeur-Jensen
10.44+          Employment Agreement dated February 9, 1998, between the Registrant and Bruce Campbell
21              Subsidiaries of the Company
23              Consent of Ernst & Young LLP, Independent Auditors
24              Power of Attorney (see page 33)
27              Financial Data Schedule

- ------------------------------------------------------------------------------------------------------------------------
<FN>
       (1)      Incorporated by reference to the Company's Registration Statement on Form S-1 (Registration No.
                333-03172)
       (2)      Incorporated by reference to the Company's  Report on Form 8-K filed
                on March 13, 1998. 
       (3)      Incorporated by reference to the Company's amended
                Quarterly Report on Form 10-Q filed on August 15, 1997
       (4)      Incorporated by reference to the Company's  Quarterly Report on Form
                10-Q  filed on August  14,  1997 
       (5)      Incorporated  by  reference  to the Company's Report on Form 10-K for the fiscal year ended December 31, 1996
       (6)      Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed on November 14, 1997
       (7)      Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed on November 16, 1998.

         *      Confidential treatment has been granted with respect to certain portions of the exhibit.
         +      Confidential treatment has been requested with respect to certain portions of the exhibit.
</FN>
</TABLE>
(d) Financial Statement Schedules
       See Item 14(a) (2) above.

<PAGE>


                                   SIGNATURES

     Pursuant  to the  requirements  of  Section  13 or 15(d) of the  Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                              NEUROCRINE BIOSCIENCES, INC.
                              A Delaware Corporation



                      By:     /s/ Gary A. Lyons                            
                              Gary A. Lyons
                              President and Chief Executive Officer

                              Date: March 31, 1999




                                POWER OF ATTORNEY

     KNOW ALL  PERSONS  BY THESE  PRESENTS,  that each  person  whose  signature
appears below  constitutes  and appoints Gary A. Lyons and Paul Hawran,  jointly
and severally his  attorneys-in-fact,  each with the power of substitution,  for
him in any and all  capacities,  to sign any  amendment  to this  Report on Form
10-K,  and to file the  same,  with  exhibits  thereto  and other  documents  in
connection  therewith,  with the  Securities  and  Exchange  Commission,  hereby
ratifying  and  confirming  all  that  each  of said  attorneys-in-fact,  or his
substitute or substitutes, may or cause to be done by virtue hereof.

     Pursuant to the  requirements of the Securities  Exchange Act of 1934, this
report has been signed by the following  persons on behalf of the Registrant and
in the capacities and on the dates indicated.


Signature                Title                                        Date
- --------------------------------------------------------------------------------

/s/ Gary A. Lyons        President, Chief Executive Officer and   March 31, 1999
- -----------------------  Director (Principal Executive Officer)
Gary A. Lyons                             


/s/ Paul W. Hawran       Chief Financial Officer                  March 31, 1999
- -----------------------  (Principal Financial and Accounting Officer)
Paul W. Hawran                            

/s/ Joseph A. Mollica    Chairman of the Board of Directors       March 31, 1999
- -----------------------
Joseph A. Mollica.

/s/ Richard F. Pops      Director                                 March 31, 1999
- -----------------------
Richard F. Pops

/s/ Harry F. Hixson, Jr. Director                                 March 31, 1999
- -----------------------
Harry F. Hixson, Jr.

/s/ Wylie W. Vale        Director                                 March 31, 1999
- -----------------------
Wylie W. Vale

<PAGE>



                          NEUROCRINE BIOSCIENCES, INC.
                 INDEX TO THE CONSOLIDATED FINANCIAL STATEMENTS




                                                                            Page

Report of Ernst & Young LLP, Independent Auditors  ........................   35

Consolidated Balance Sheet ................................................   36

Consolidated Statement of Operations ......................................   37

Consolidated Statement of Stockholders' Equity ............................   38

Consolidated Statement of Cash Flows ......................................   39

Notes to the Consolidated Financial Statements ............................   40

<PAGE>




                REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS



The Board of Directors and Stockholders
Neurocrine Biosciences, Inc.

We have  audited  the  accompanying  consolidated  balance  sheet of  Neurocrine
Biosciences, Inc. as of December 31, 1998 and 1997, and the related consolidated
statements of operations,  stockholders'  equity, and cash flows for each of the
three years in the period ended December 31, 1998.  These  financial  statements
are the  responsibility of the Company's  management.  Our  responsibility is to
express an opinion on these financial statements based on our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all  material  respects,  the  consolidated  financial  position  of  Neurocrine
Biosciences, Inc. at December 31, 1998 and 1997, and the consolidated results of
its  operations  and its cash  flows for each of the three  years in the  period
ended  December 31, 1998,  in  conformity  with  generally  accepted  accounting
principles.



                              /s/ ERNST & YOUNG LLP
                              ERNST & YOUNG LLP

San Diego, California
January 26, 1999,
except for Note 13, as to which the date is
March 2, 1999


<PAGE>


                          NEUROCRINE BIOSCIENCES, INC.
                           Consolidated Balance Sheet
                                 (in thousands)
                                  December 31,
                                                          --------------------
                                                            1998         1997
                                                          ---------   --------

               ASSETS
Current assets:
    Cash and cash equivalents ...........................  $ 11,708    $ 15,771
    Short-term investments, available-for-sale ..........    50,962      59,321
    Receivables under collaborative agreements ..........       863         194
    Receivables from related parties ....................       544         156
    Other current assets ................................     1,556         936
                                                           --------    --------
       Total current assets .............................    65,633      76,378

    Property and equipment, net .........................    10,899       8,846
    Licensed technology and patent applications costs, net      967       1,185
    Investment in Neuroscience Pharma, Inc. .............     1,411       3,343
    Other assets ........................................     1,619       2,151
                                                           ========    ========
       Total assets .....................................  $ 80,529    $ 91,903
                                                           ========    ========

                     LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
    Accounts payable ..................................... $  2,481    $  1,822
    Accrued liabilities ..................................    2,077       2,402
    Deferred revenues ....................................      169       1,919
    Current portion of long-term debt ....................      149         149
    Current portion of capital lease obligations .........      693         724
                                                            --------    --------
       Total current liabilities .........................    5,569       7,016

    Long-term debt, net of current portion ...............      461         597
    Capital lease obligations, net of current portion ....    1,786         125
    Deferred rent ........................................      257         659
    Other liabilities ....................................      498         354
                                                            --------    --------
       Total liabilities .................................    8,571       8,751

Commitments and contingencies

Stockholders' equity:
    Preferred Stock, $0.001 par value; 5,000,000 shares
       authorized; no shares issued and outstanding ......       --          --
    Common Stock, $0.001 par value; 100,000,000 shares
       authorized; issued and outstanding shares were
       18,930,865 in 1998 and 17,686,802 in 1997 .........       19          18
    Additional paid in capital ...........................   97,064      88,586
    Deferred compensation ................................     (187)       (439)
    Stockholder notes ....................................     (119)       (120)
    Accumulated other comprehensive income ...............       31           2
    Accumulated deficit ..................................  (24,850)     (4,895)
                                                            --------    --------
       Total stockholders' equity ........................   71,958      83,152
                                                            --------    --------
       Total liabilities and stockholders' equity ........ $ 80,529    $ 91,903
                                                            ========    ========

                             See accompanying notes.

<PAGE>

<TABLE>
<CAPTION>
                          NEUROCRINE BIOSCIENCES, INC.
                      Consolidated Statement of Operations
                                 (in thousands)

                                                                           Year-ended December 31,
                                                                      --------------------------------
                                                                        1998        1997        1996
                                                                      --------    --------    --------
<S>                                                                   <C>         <C>         <C>     
Revenues:
    Sponsored research and development ............................   $  8,751    $ 14,985    $  9,092
    Sponsored research and development from related party .........      3,610        --          --
    Milestones and license fees ...................................      2,500      10,250       9,000
    Grant income and other revenues ...............................      1,176         909       1,124
                                                                      --------    --------    --------
       Total revenues .............................................     16,037      26,144      19,216
Operating expenses:
    Research and development ......................................     21,803      18,758      12,569
    General and administrative ....................................      6,594       5,664       3,697
    Write-off of acquired in-process research and
    development and licenses ......................................      4,910        --          --
                                                                      --------    --------    --------
       Total operating expenses ...................................     33,307      24,422      16,266

Income (loss) from operations .....................................    (17,270)      1,722       2,950
Other income and expenses:
    Interest income ...............................................      4,151       4,084       2,870
    Interest expense ..............................................       (151)       (153)       (272)
    Equity in NPI losses and other adjustments ....................     (7,188)     (1,130)       --
    Other income ..................................................        504         818         574
                                                                      --------    --------    --------
Income (loss) before taxes ........................................    (19,954)      5,341       6,122
Income taxes ......................................................          1         214         248
                                                                      --------    --------    --------
Net income (loss) .................................................   $(19,955)   $  5,127    $  5,874
                                                                      ========    ========    ========
Earnings (loss) per common share:
    Basic .........................................................   $  (1.10)   $   0.30    $   0.39
    Diluted .......................................................   $  (1.10)   $   0.28    $   0.36

Shares used in the calculation of earnings (loss) per common share:
    Basic .........................................................     18,141      16,930      14,971
    Diluted .......................................................     18,141      18,184      16,127

</TABLE>

                             See accompanying notes.

<PAGE>

<TABLE>
<CAPTION>
                                                    NEUROCRINE BIOSCIENCES, INC.
                                            Consolidated Statement of Stockholders' Equity
                                                            (in thousands)

                                                                                                          
                                                                                        Notes      Accumulated                 
                                                    Common Stock  Additional Unearned Receivable       Other     Accumu-    Total
                                                   --------------  Paid In   Compen-    from       Comprehensive  lated Stockholders
                                                    Shares Amount  Capital   sation  Stockholders  Income (Loss) Deficit   Equity
                                                   ---------------------------------------------------------------------------------
<S>                                                <C>      <C>  <C>         <C>      <C>             <C>       <C>        <C> 
     BALANCE AT DECEMBER 31, 1995 ..............   11,723   $12  $ 35,586    $(342)   $(138)          $  3      $(15,896)  $ 19,225
Net income .....................................       --    --        --       --       --             --         5,874      5,874
Unrealized gain on short-term investments ......       --    --        --       --       --             39            --         39
                                                                                                                            --------
Comprehensive income ...........................       --    --        --       --       --             --            --      5,913
Issuance of common stock for cash ..............    5,054     5    47,535       --       --             --            --     47,540
Payments received on stockholder notes .........       --    --        --       --       10             --            --         10
Deferred compensation and related 
  amortization, net                                    --    --       113      (34)      --             --            --         79
                                                   ---------------------------------------------------------------------------------
     BALANCE AT DECEMBER 31, 1996 ..............   16,777    17    83,234     (376)    (128)            42       (10,022)    72,767
Net income .....................................       --    --        --       --       --             --         5,127      5,127
Unrealized loss on short-term investments ......       --    --        --       --       --            (40)           --        (40)
                                                                                                                            --------
Comprehensive income ...........................       --    --        --       --       --             --            --      5,087
Issuance of common stock for warrants ..........      182    --        59       --       --             --            --         59
Issuance of common stock for option exercises ..      106    --       453       --       --             --            --        453
Issuance of common stock pursuant to the
  Employee Stock Purchase Plan .................       22    --       175       --       --             --            --        175
Issuance of common stock in exchange for
  NPI Preferred Stock ..........................      600     1     4,473       --       --             --            --      4,474
Payments received on stockholder notes .........       --    --        --       --        8             --            --          8
Deferred compensation and related 
  amortization, net ............................       --    --       192      (63)      --             --            --        129
                                                   ---------------------------------------------------------------------------------
     BALANCE AT DECEMBER 31, 1997 ..............   17,687    18    88,586     (439)    (120)             2        (4,895)    83,152
Net loss .......................................       --    --        --       --       --             --       (19,955)   (19,955)
Unrealized gain on short-term investments ......       --    --        --       --       --             29            --         29
                                                                                                                            --------
Comprehensive loss .............................       --    --        --       --       --             --            --    (19,926)
Issuance of common stock for warrants ..........       60    --       142       --       --             --            --        142
Issuance of common stock for option exercises ..       81    --       286       --       --             --            --        286
Issuance of common stock pursuant to the
  Employee Stock Purchase Plan .................       30    --       205       --       --             --            --        205
Issuance of common stock in exchange for
  NPI Preferred Stock ..........................      679     1     3,854       --       --             --            --      3,855
Issuance of common stock for NNL Acquisition ...      392    --     4,032       --       --             --            --      4,032
Issuance of common stock for milestone achievement      2    --        17       --       --             --            --         17
Payments received on stockholder notes .........       --    --        --       --        1             --            --          1
Amortization of deferred compensation, net .....       --    --       (58)     252       --             --            --        194
                                                    -------------------------------------------------------------------------------
     BALANCE AT DECEMBER 31, 1998 ..............    18,931  $19  $ 97,064    $(187)   $(119)          $ 31      $(24,850)  $ 71,958
                                                    ===============================================================================
</TABLE>

                                                        See accompanying notes.

<PAGE>

<TABLE>
<CAPTION>
                          NEUROCRINE BIOSCIENCES, INC.
                      Consolidated Statement of Cash Flows
                                 (in thousands)


                                                                   Twelve Months Ended December 31,
                                                                  ---------------------------------
                                                                    1998         1997        1996
                                                                  --------    ---------    --------
<S>                                                               <C>         <C>          <C>     
CASH FLOW FROM OPERATING ACTIVITIES
Net (loss) income .............................................   $(19,955)   $   5,127    $  5,874
Adjustments to reconcile net income (loss) to net cash
  Provided by (used in) operating activities:
      Acquisition of Northwest NeuroLogic for Common Stock ....      4,200           --          --
      Equity in NPI losses and other adjustments ..............      7,188        1,130          --
      Depreciation and amortization ...........................      1,720        1,322         981
      Loss on abandonment of assets ...........................        460           76          25
      Gain on sale of equipment ...............................        (15)          --          --
      Deferred revenues .......................................     (1,750)       1,000         419
      Deferred rent ...........................................       (402)         384          61
      Compensation expenses recognized for stock options ......        194          129          79
      Change in operating assets and liabilities,
        net of acquired business:
          Accounts receivable and other current assets ........     (2,898)         885        (936)
          Other non-current assets ............................        291       (1,274)       (486)
          Accounts payable and accrued liabilities ............        271        2,213         665
                                                                  --------    ---------    --------
Net cash flows (used in) provided by operating activities .....    (10,696)      10,992       6,682

CASH FLOW FROM INVESTING ACTIVITIES
Purchases of short-term investments ...........................    (41,618)    (113,080)    (85,171)
Sales/maturities of short-term investments ....................     50,006      112,315      38,918
Proceeds from sale of equipment ...............................         72           --          --
Purchases of property and equipment ...........................     (3,755)      (6,440)     (2,304)
                                                                   --------    ---------    --------
Net cash flows provided by (used in) investing activities .....      4,705       (7,205)    (48,557)

CASH FLOW FROM FINANCING ACTIVITIES
Issuance of Common Stock ......................................        433          687      47,540
Proceeds received from long-term obligations ..................      2,500          747          --
Principal payments on long-term obligations ...................     (1,006)        (783)       (742)
Payments received on notes receivable from stockholders .......          1            8          10
                                                                  --------    ---------    --------
Net cash flows provided by financing activities ...............      1,928          659      46,808
                                                                  --------    ---------    --------
Net decrease in cash and cash equivalents .....................     (4,063)       4,446       4,933

Cash and cash equivalents at beginning of the period ..........     15,771       11,325       6,392
                                                                  --------    ---------    --------
Cash and cash equivalents at end of the period ................   $ 11,708    $  15,771    $ 11,325
                                                                  ========    =========    ========


SUPPLEMENTAL DISCLOSURES
Supplemental disclosures of cash flow information:
      Interest paid ...........................................   $    150    $     153     $   272
      Taxes paid ..............................................          1          250          40

Schedule of noncash investing and financing activities in 1998:
      Conversion of note receivable to investment in NPI ......   $  1,401           --          --
      Conversion of NPI Preferred Stock to investment in NPI ..      3,855        4,474          --

</TABLE>

                                                        See accompanying notes.

<PAGE>


                          NEUROCRINE BIOSCIENCES, INC.
           NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                                December 31, 1998

1.       ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     BUSINESS  ACTIVITIES:  Neurocrine  Biosciences,  Inc. (the  "Company")  was
incorporated  in  California  on  January  17,  1992 and was  reincorporated  in
Delaware in March 1996. The Company is engaged in the discovery and  development
of  therapeutics  for the  treatment  of diseases  and  disorders of the central
nervous and immune  systems  which  includes  anxiety,  depression,  Alzheimer's
disease, obesity, stroke and multiple sclerosis.

     PRINCIPLES OF CONSOLIDATION:  The consolidated financial statements include
the accounts of  Neurocrine  Biosciences,  Inc. (the  "Company")  and its wholly
owned subsidiary,  Northwest NeuroLogic, Inc. ("NNL").  Significant intercompany
accounts and transactions have been eliminated in consolidation.

     USE OF ESTIMATES:  The  preparation  of financial  statements in conformity
with  generally  accepted  accounting  principles  requires  management  to make
estimates  and  assumptions  that affect the amounts  reported in the  financial
statements and the accompanying notes.
Actual results could differ from those estimates.

     CASH EQUIVALENTS:  The Company considers all highly liquid investments with
a maturity of three months or less when purchased, to be cash equivalents.

    SHORT-TERM INVESTMENTS  AVAILABLE-FOR-SALe:  In accordance with Statement of
Financial  Accounting  Standards ("SFAS") No. 115,  "Accounting for Certain Debt
and   Equity   Securities,"    short-term    investments   are   classified   as
available-for-sale.  Available-for-sale  securities  are  carried at fair value,
with the  unrealized  gains and  losses  reported  in a  separate  component  of
stockholders'  equity. The amortized cost of debt securities in this category is
adjusted for  amortization  of premiums and  accretion of discounts to maturity.
Such  amortization is included in investment  income.  Realized gains and losses
and   declines  in  value  judged  to  be   other-than-temporary,   if  any,  on
available-for-sale  securities  are included in investment  income.  The cost of
securities  sold is based on the specific  identification  method.  Interest and
dividends  on  securities  classified  as  available-for-sale  are  included  in
interest income.

     The Company  invests its excess cash  primarily  in  investment  grade debt
instruments,  marketable  debt  securities  of  U.S.  government  agencies,  and
high-grade commercial paper.  Management has established  guidelines relative to
diversification and maturities that maintain safety and liquidity.

     PROPERTY  AND  EQUIPMENT:  Property  and  equipment  are  carried  at cost.
Depreciation  and  amortization  are provided over the estimated useful lives of
the assets, ranging from three to ten years, using the straight-line method.

     LICENSED  TECHNOLOGY  AND PATENT  APPLICATION  COSTS:  Licensed  technology
consists of exclusive,  worldwide,  perpetual licenses to patents related to the
Company's  platform  technology which are capitalized at cost and amortized over
periods of 7 to 11 years.  These costs are regularly  reviewed to determine that
they  include  costs for patent  applications  the  Company is  pursuing.  Costs
related to applications  that are not being actively pursued are evaluated under
Accounting Principles Board Statement 17 "Intangible Assets" and are adjusted to
an  appropriate   amortization  period  which  generally  results  in  immediate
write-off.  Accumulated  amortization at December 31, 1998 and 1997 was $679,000
and $461,000, respectively.

     IMPAIRMENT  OF  LONG-LIVED  ASSETS:  The  Company  routinely  assesses  the
recoverability of long-lived assets by determining whether the carrying value of
such assets can be recovered through  undiscounted  future operating cash flows.
If  impairment  is  indicated,  the  Company  will  measure  the  amount of such
impairment by comparing the carrying  value of the asset to the present value of
the expected future cash flows associated with the use of the asset.

     INDUSTRY  SEGMENT AND  GEOGRAPHIC  INFORMATION:  The Company  operates in a
single industry  segment - the discovery and development of therapeutics for the
treatment  of diseases  and  disorders  of the central  nervous and immune.  The
Company has no foreign operations.

     RESEARCH AND DEVELOPMENT REVENUE AND EXPENSES: Revenues under collaborative
research  agreements  are  recognized  over the period  specified in the related
agreement.  Advance payments received in excess of amounts earned are classified
as deferred revenue and recognized as income in the period earned. Revenues from
government  grants are recognized  based on the performance  requirements of the
grant or as the grant expenditures are incurred.  Research and development costs
are  expensed  as  incurred.   Such  costs  include  proprietary   research  and
development  activities  and expenses  associated  with  collaborative  research
agreements.   Research  and  development   expenses  relating  to  collaborative
agreements and grants were  approximately  $12.0 million,  $9.4 million and $8.3
million during 1998, 1997 and 1996, respectively.

     STOCK-BASED  COMPENSATION:  The Company accounts for stock option grants to
employees  in  accordance  with  Accounting  Principles  Board  Opinion  No. 25,
"Accounting for Stock Issued to Employees" (APB 25) and related  Interpretations
because the Company believes the alternative fair value accounting  provided for
under SFAS No. 123, "Accounting for Stock-Based  Compensation," requires the use
of option  valuation  models that were not developed for use in valuing employee
stock options. Deferred compensation is recorded only in the event that the fair
market value of the stock on the date of the option  grant  exceeds the exercise
price of the options.  Such deferred  compensation is amortized over the vesting
period of the options.  Compensation  expense  recognized during the years ended
December  31,  1998,   1997  and  1996  was  $194,000,   $129,000  and  $79,000,
respectively.

     EARNINGS PER SHARE:  Basic and diluted  earnings per share is calculated in
accordance with FASB Statement No. 128,  "Earnings per Share".  All earnings per
share  amounts  for all  periods  have been  presented,  and where  appropriate,
were restated to conform to the requirements of Statement No. 128.

    COMPREHENSIVE INCOME:  Comprehensive income is calculated in accordance with
FASB  Statement No. 130,  "Comprehensive  Income".  The  Statement  requires the
disclosure of all components of comprehensive  income,  including net income and
changes  in  equity  during a period  from  transactions  and other  events  and
circumstances   generated   from   non-owner   sources.   The  Company's   other
comprehensive income consisted of gains and losses on short-term investments and
is reported in the consolidated statement of stockholders' equity.

     RECLASSIFICATIONS:  Certain  reclassifications have been made to prior year
amounts to conform to the presentation for the year ended December 31, 1998.

    IMPACT OF  RECENTLY  ISSUED  ACCOUNTING  STANDARDS:  In June 1998,  the FASB
issued  Statement No. 133,  "Accounting  for Derivative  Instruments and Hedging
Activities". The Company expects to adopt the new Statement effective January 1,
2000. The Statement will require the Company to recognize all derivatives on the
balance sheet at fair value.  The Company does not anticipate  that the adoption
of the Statement will have a significant  effect on its results of operations or
financial position.


2.  ACQUIRED IN-PROCESS RESEARCH AND DEVELOPMENT AND LICENSES

     NORTHWEST NEUROLOGIC, INC: In May 1998, the Company acquired the assets and
liabilities of Northwest NeuroLogic,  Inc. ("NNL"), a neurodegenerative research
and  development  company,  in exchange for 392,608  shares of Company's  Common
Stock and 105,414 of stock options valued at $4.2 million. The operations of NNL
are  included  in the  consolidated  statement  of  operations  from the date of
acquisition.

     The  acquisition  was  accounted for as a purchase  and,  accordingly,  the
purchase  price has been  allocated to the assets  acquired and the  liabilities
assumed based on the estimated fair market value at the date of the acquisition.
The amount  allocated  to  in-process  research and  development  was charged to
expense because the technology has not reached technological feasibility and has
no future  alternative  uses.  The purchase  price was  allocated as follows (in
thousands):

     Current assets ..............................  $   180
     Furniture and equipment .....................       49
     Liabilities assumed .........................     (207)
     In-process research and development .........    4,200
                                                    ------- 
     Total purchase price ........................  $ 4,222
                                                    =======

     The acquired in-process research and development  consisted of Melanocortin
("MCR"), a brain receptor technology relating obesity and  Excitatory Amino Acid
Transporters  ("EAATs"),  a technology relating to neurodegeneration and stroke.
Both in-process research and development are in early developmental stages.

    The nature and efforts required to develop the acquired  in-process research
and development  into  commercially  viable products  include  completion of the
development  stages of a  compound,  pre-clinical  development,  clinical  trial
testing,  FDA  approval  and  commercialization.   Due  to  the  nature  of  the
pharmaceutical  development process, the Company anticipates substantial further
research and clinical  expenditures to develop the products.  There is, however,
no certainty that either of these programs will result in viable products.

     The following  are the pro forma  unaudited  results of operations  for the
years ended December 31, 1998 and 1997, had the purchase of NNL been consummated
as of January 1, of the respective years:

                                               1998                1997
                                           ------------------------------------
                                          (in thousands, except per share data)
               
               Revenues ..................  $ 16,325             $ 26,783
               Net income (loss) .........   (20,013)                 975
               Earnings (loss) per share:
               Basic .....................  $  (1.09)              $ 0.06
               Diluted ...................     (1.09)                0.05

     This pro forma  information  is not  necessarily  indicative  of the actual
results that would have been  achieved had NNL been acquired on January 1, 1997,
nor is it necessarily indicative of future results.

     OTHER:  During  1998,  the  Company  purchased  licenses  for  technologies
relating to insomnia in the amount of $440,000 and brain cancer in the amount of
$270,000.  These  projects  are in the  early  stages of  development,  have not
reached   technological   feasibility  and  have  no  known   alternative  uses.
Consequently, the costs of these licenses were expensed.


3.   SHORT-TERM INVESTMENTS

     The  following  is  a  summary  of  short-term  investments  classified  as
available-for-sale securities (in thousands):

<TABLE>
<CAPTION>
                           -----------------------------------------------------
                                            Gross          Gross       Estimated
                            Amortized     Unrealized     Unrealized      Fair
                              Cost          Gains          Losses        Value
                           -----------------------------------------------------
<S>                        <C>           <C>             <C>           <C>   
December 31, 1998
US Government securities    $  6,000     $     17         $   --       $  6,017
Certificates of deposit .        260           --             --            260
Commercial paper ........      5,420           --             --          5,420
Corporate debt securities     39,141           61            (87)        39,115
Other ...................        110           40             --            150
                            ----------------------------------------------------
         Total securities   $ 50,931     $    118        $   (87)      $ 50,962
                            ========     ========        ========      ========

December 31, 1997
US Government securities    $ 11,975     $     54         $   --       $ 12,029
Certificates of deposit .        247           --             --            247
Commercial paper ........      9,850           --             --          9,850
Corporate debt securities     37,143            4            (60)        37,087
Other ...................        104            4             --            108
                            ----------------------------------------------------
         Total securities   $ 59,319     $     62        $   (60)      $ 59,321
                            ========     ========        ========      ========


</TABLE>

     Gross  realized  gains and losses were not material for any of the reported
periods.  The  amortized  cost and  estimated  fair value of debt  securities by
contractual maturity at December 31, 1998, are shown below (in thousands).

                                                 Amortized      Estimated
                                                   Cost         Fair Value
                                                 -------         -------- 
  Due in one year or less .....................  $22,883          $23,002
  Due after one year through five years .......   28,048           27,960
                                                  ------           ------
                                                 $50,931          $50,962
                                                 =======          =======


4.         PROPERTY AND EQUIPMENT

     Property  and  equipment  at  December  31,  1998 and 1997,  consist of the
following (in thousands):

                                                     1998           1997
                                                   -------        ------
Land ..........................................    $5,299          $4,985
Furniture and fixtures ........................     1,856           1,204
Equipment .....................................     7,356           4,956
Leasehold improvements ........................       562             717
                                                   ------         -------      
                                                   15,073          11,862
Less accumulated depreciation and amortization     (4,174)         (3,016)
                                                  --------         -------
Net property and equipment ....................   $ 10,899        $ 8,846
                                                  ========        ========

     Furniture  and equipment  under  capital  leases were $5.8 million and $3.3
million at December 31, 1998 and 1997, respectively. Accumulated depreciation of
furniture  and  equipment  under  capital  leases  totaled $3.1 million and $2.2
million at  December  31,  1998 and 1997,  respectively.  The  Company  received
proceeds of $2.5 million for equipment that it sold and subsequently leased back
under capital lease obligations in 1998. No similar  transactions were conducted
in 1997.

5.   ACCRUED LIABILITIES

     Accrued  liabilities at December 31, 1998 and 1997 consist of the following
(in thousands):
                                                         1998       1997
                                                       -------    -------
                  Accrued employee benefits .........  $ 1,120    $ 1,162
                  Accrued professional fees .........      438        470
                  Accrued development costs .........      333        300
                  Taxes payable .....................       15        195
                  Other accrued liabilities .........      171        275
                                                       -------    -------
                                                        $2,077     $2,402
                                                       =======    =======


6.  LONG-TERM DEBT

     During 1997, the Company partially  financed the purchase of land under a 5
year note payable for approximately $747,000, which bears interest at a floating
rate of prime plus one quarter percent (8.00% at December 31, 1998). The note is
repayable in equal monthly installments beginning February 1998.

     At December 31, 1998, the repayment  schedule for the note was $149,000 for
each year 1999 through 2002 and $13,000 in the year 2003.


7.  COMMITMENTS AND CONTINGENCIES

     CAPITAL LEASE OBLIGATIONS: The Company has financed certain equipment under
capital  lease  obligations  which expire on various dates through the year 2002
and bear interest at rates  between 7.6% and 11.6%.  The lease  commitments  are
repayable in monthly installments.

     OPERATING  Leases:  In May 1997, the Company purchased two adjacent parcels
of land in San Diego for $5.0  million.  In August  1997,  the Company  sold one
parcel to Science Park Center LLC, a California  limited  liability company (the
"LLC"),  of which the Company owns a minority  interest,  in exchange for a note
receivable  in the amount of $3.5 million plus interest of 8.25%.  However,  for
accounting purposes,  this transaction does not qualify as a sale under SFAS No.
98 and therefore,  the entire amount of the note receivable is included in land.
The amount  included in land at December  31, 1998 and 1997 was $3.8 million and
$3.5 million, respectively.

     During 1998, the LLC constructed an expanded  laboratory and office complex
which was leased by the  Company  under a 15 year  operating  lease,  commencing
September  1998. The Company has the option to purchase the facility at any time
during the term of the lease at a predetermined  price.  The lease contains a 4%
per year  escalation  in base rent fees,  effective  with each  anniversary.  In
November 1998, the Company  subleased a portion of this facility to an unrelated
third party for a term of 20 months.  The Company will hold the second parcel of
land until such a time as additional facilities are required.

     In November 1998,  the lease  obligation  relating to the Company's  former
operating facility was amended to reduce the amount of square footage leased and
to  shorten  the lease term to  conclude  in June 2000.  The  Company  currently
subleases  this space to an  unrelated  third party and is obligated to continue
this arrangement through June 2000.

     Repayment  schedules for the capital lease  obligations and operating lease
commitments at December 31, 1998 are as follows (in thousands):

                                                 Capital        Operating
   Fiscal Year:                                   Leases          Leases
                                                --------         --------
   1999 ........................................   $863           $2,924
   2000 ........................................    733            2,731
   2001 ........................................    900            2,525
   2002 ........................................    350            2,626
   2003 ........................................     --            2,731
   Thereafter ..................................     --           32,721
                                                --------         --------
   Total minimum payments ......................  2,846          $46,258
                                                                 ========
   Less:  amounts representing interest ........   (367)
                                                --------
   Future minimum payments .....................  2,479
   Less:  current portion ......................   (693)
                                                --------
  Future payments on capital lease obligations . $1,786
                                                ========

     Rent expense was $2,379,000,  $2,139,000, and $1,298,00 for the years ended
December 31, 1998,  1997 and 1996,  respectively.  Sublease income was $837,000,
$917,000 and  $598,000,  for the years ended  December 31, 1998,  1997 and 1996,
respectively.

     Future  minimum  sublease  income  to  be  received  under   non-cancelable
subleases  at  December  31, 1998 will be $985,000  and  $506,000  for the years
ending December 31, 1999 and 2000, respectively.

     Licensing and Research  Agreements:  The Company has entered into licensing
agreements with various universities and research organizations. Under the terms
of these  agreements,  the  Company has  received  licenses  to  technology,  or
technology  claimed, in certain patents or patent  applications.  The Company is
required to pay royalties on future sales of products  employing the  technology
or falling under claims of a patent,  and,  certain  agreements  require minimum
royalty payments.  Certain  agreements also require the Company to make payments
upon the achievement of specified milestones.


8.   STOCKHOLDERS' EQUITY

     Common Stock Issuances: From inception through 1996, the Company has issued
Common Stock in various  private and public  offerings,  as well as to corporate
collaborators,  at prices  between  $5.00 and  $10.50  per  share  resulting  in
aggregate net proceeds of approximately $72.1 million.

     Options:  The Company has authorized  5,005,414  shares of its Common Stock
for issuance upon exercise of options or stock purchase rights granted under the
1992  Incentive  Stock Option Plan,  1996 Director  Option Plan and the 1997 NNL
Stock Option Plan (collectively  "the Plan").  These plans provide for the grant
of stock options and stock purchase rights to officers, directors, and employees
of, and consultants and advisors to, the Company. Options under these plans have
terms  of up to 10  years  from  the  date of  grant  and may be  designated  as
incentive  stock options or  nonstatutory  stock options under the Plan.


     A summary of the Company's stock option activity,  and related  information
for the years ended December 31 follows:

<TABLE>
<CAPTION>
                                           1998                       1997                        1996
                               --------------------------  ---------------------------  --------------------------
                                                 Weighted                    Weighted                   Weighted
                                                 Average                     Average                    Average
                                   Options       Exercise       Options      Exercise      Options      Exercise 
                                 (in thousands)   Price     (in thousands)    Price      (in thousands)   Price
                               ---------------------------  --------------------------  --------------------------
<S>                                <C>            <C>            <C>           <C>           <C>          <C>  
Outstanding at January 1, .....     2,653         $5.84          1,739         $4.48         1,415        $3.61
Granted .......................       677         $6.26          1,072         $7.86           378        $7.92
Exercised .....................       (81)        $3.64           (100)        $4.10           (11)       $3.60
Canceled ......................      (456)        $5.76            (58)        $5.88           (43)       $4.41
                               ----------------------------  --------------------------  ------------------------
Outstanding at December 31, ...     2,793         $6.02          2,653         $5.85          1,739       $4.48
                               ============================  ==========================  ========================
</TABLE>

    A summary of options outstanding as of December 31, 1998 follows:

<TABLE>
<CAPTION>
                       Options Outstanding                                      Options Exercisable
- ------------------------------------------------------------------     --------------------------------------
                                      Weighted                                                               
                                       Average                                                       
                    Outstanding       Remaining         Weighted        Exercisable         Weighted
   Range of           as of         Contractual         Average          As of             Average
 Exercise Prices     12/31/98          Life         Exercise Price      12/31/98        Exercise Price
- -------------------------------------------------------------------------------------------------------------
<S>                   <C>             <C>                 <C>             <C>                 <C>                  
 $0.02 to $2.50         492           5.4 years           $2.24             427               $2.40
      $4.25             553           6.2 years           $4.25             474               $4.25
 $5.00 to $7.01         486           8.6 years           $6.36             104               $5.64
 $7.38 to $7.86         678           8.5 years           $7.62             228               $7.58
 $8.00 to $10.25        584           8.2 years           $8.73             294               $8.73
                  -------------------------------------------------------------------------------------------
                      2,793           7.5 years           $6.02           1,527               $5.19
</TABLE>

     The weighted  average fair values of the options  granted during 1998, 1997
and 1996 were $5.59, $5.01 and $5.79, respectively.

     Pro forma  information  regarding net income (loss) is required by SFAS No.
123, and has been  determined  as if the Company had  accounted for its employee
stock options under the fair value method of that Statement.  The fair value for
these  options was estimated at the date of grant using a  Black-Scholes  option
pricing model using the following  weighted-average  assumptions  for 1998, 1997
and 1996,  respectively:  risk-free  interest  rates of 5.5%,  5.8% and 6.1%;  a
dividend  yield of 0.0% (for all  years),  volatility  factors  of the  expected
market price of the  Company's  common stock of .88, .43 and .41; and a weighted
average expected life of the option of 5 years (for all years presented).

     For  purposes of pro forma  disclosures,  the  estimated  fair value of the
options granted is amortized to expense over the options'  vesting  period.  The
pro forma effect on net income loss for 1998 and net income in 1997 and 1996, is
not likely to be  representative  of the effects on  reported  income or loss in
future years because  these  amounts  reflect less than full vesting for options
granted during these periods.  The Company's pro forma information for the years
ended  December 31, 1998,  1997 and 1996 follows (in  thousands,  except for per
share data):

                                                   1998       1997       1996
                                              ---------------------------------
 Pro forma net income (loss) .................  $(20,758)     $4,364     $5,375
 Pro forma income (loss) per share (diluted) .    $(1.14)      $0.24      $0.33


     EMPLOYEE STOCK  PURCHASE  PLAN: The Company has reserved  125,000 shares of
Common Stock for  issuance  under the 1996  Employee  Stock  Purchase  Plan (the
"Purchase  Plan").  The  Purchase  Plan permits  eligible  employees to purchase
Common Stock through payroll  deductions at a purchase price equal to 85% of the
lesser of the fair market  value per share of Common  Stock on the start date of
an  offering  period or on the date on which the shares are  purchased.  Through
December 31, 1998, 51,082 shares had been issued pursuant to the Purchase Plan.

     WARRANTS:  The Company has outstanding  warrants to purchase 388,185 shares
of Common Stock at exercise  prices of $5.00 and $10.50 per share.  The warrants
generally  expire between 1998 and 2007. At December 31, 1998,  all  outstanding
warrants were exercisable.

     The  following  shares of Common Stock are reserved for future  issuance at
December 31, 1998:

         Stock option plans .....................   3,465,465
         Employee stock purchase plan ...........      73,918
         Warrants ...............................     388,185
                                                   ---------- 
         Total ..................................   3,927,568
                                                   ==========

     Of the shares  available for future issuance under the Plan,  2,792,987 are
outstanding grants and 672,478 remain available for future grant.


9.   COLLABORATIVE RESEARCH AND DEVELOPMENT AGREEMENTS

     JANSSEN:  In  January  1995,  the  Company  entered  into  a  research  and
development  agreement  (the  "Janssen  Agreement")  with  Janssen,  under which
Janssen paid the Company $2.0 million in up-front  license fees and $9.7 million
in sponsored  research  payments during the three-year term of the collaborative
research  portion of the  agreement.  The research  portion of the agreement was
completed in 1997.

     Under the Janssen Agreement, the Company is entitled to receive up to $10.0
million in milestone  payments for the  indications  of anxiety,  depression and
substance  abuse,  and up to $9.0 million in additional  milestone  payments for
other indications. Milestone payments of $3.5 million have been received through
December  31,  1998.  The  Company has granted  Janssen an  exclusive  worldwide
license  to  manufacture  and  market  products   developed  under  the  Janssen
Agreement.  The Company is entitled to receive  royalties on  worldwide  product
sales and has certain  rights to  co-promote  such  products  in North  America.
Janssen is  responsible  for  funding all  clinical  development  and  marketing
activities,  including  reimbursement to Neurocrine for its promotional efforts,
if any.

     The  collaborative  research  portion of the  agreement  was  completed  as
scheduled  in  1997  with  the  selection  of  a  clinical   candidate  and  the
commencement of clinical trials in Europe.  The Company will continue to receive
milestone  payments  and  royalties  upon  the  successful  continuation  of the
development portion of the agreement.

     Janssen has the right to terminate  the Agreement  upon six months  notice.
However,  in the event of  termination,  other than  termination  by Janssen for
cause  or as a  result  of  the  acquisition  of  Neurocrine,  all  product  and
technology rights become the exclusive property of Neurocrine.

     NOVARTIS:  In January  1996,  the Company  entered into an  agreement  with
Novartis under which Novartis paid the Company $5.0 million in up-front  license
fees and is  obligated to provide  Neurocrine  with $7.0 million in research and
development  funding during the first two years of the agreement and up to $15.5
million in further research and development funding  thereafter.  As of December
31, 1998,  the Company has  received  $15.2  million in  sponsored  research and
development  payments.  In  addition,  the  Company is also  entitled to receive
milestone  payments for certain  development  and regulatory  achievements.  The
Company has received  $9.1 million of milestone  payments  through  December 31,
1998 of which $2.3 million was received in 1998.

     In return,  Novartis received manufacturing and marketing rights outside of
North  America  and will  receive  a  percentage  of  profits  on sales in North
America.  The Company will receive royalties for all sales outside North America
and a percentage of profits on sales in North America,  which the Company may at
its option convert to a right to receive royalties on product sales.  Neurocrine
is obligated to repay a portion of the development costs for potential  products
developed  in such  collaboration  unless the  Company  elects to convert to the
right to receive  royalty  payments.  Novartis  has the right to  terminate  the
agreement upon six months notice.

     ELI LILLY:  In October 1996, the Company entered into an agreement with Eli
Lilly and Company  under which the Company  expects to receive  $22.0 million in
research  payments of which $14.5  million have been received as of December 31,
1998. The Company is also entitled to milestone payments for certain development
and  regulatory  accomplishments.  The  Company  will have the option to receive
co-promotion  rights and share profits from commercial sales of select products,
which  result from the  collaboration  in the U.S. or receive  royalties on U.S.
product sales. The Company will receive  royalties on product sales for the rest
of the world.


10.  RELATED PARTY TRANSACTIONS

     Neuroscience  Pharma, Inc: In March 1996, the Company along with a group of
Canadian   institutional   investors  (the  "Canadian  Investors")   established
Neuroscience  Pharma Inc.  ("NPI").  The Company's  contribution  was to license
certain  technology and Canadian marketing rights to NPI. The Canadian Investors
contributed  approximately  $9.5 million in cash in exchange for Preferred Stock
of NPI, which could be converted into 1,279,758  shares of the Company's  Common
Stock at the option of the investors.  Upon conversion of the Preferred  Shares,
ownership  of  the  shares  transfer  to  the  Company  and  is  redeemable  for
approximately $9.5 million in cash at the option of the Company.

     NPI has committed to use these funds for research and clinical  development
of certain of the  Company's  programs in  exchange  for  royalties  on sales of
products  developed,  as well as, exclusive  Canadian  marketing rights for such
products in certain  situations.  The Company  has the right to  terminate  this
agreement upon the conversion of the Preferred  Shares. In connection with their
investment in NPI, the Canadian Investors also received warrants exercisable for
383,875 shares of the Company's  Common Stock at an exercise price of $10.50 per
share and are also  eligible to receive  additional  warrants in the future upon
attainment of certain additional funding.

     During  December 1997 and October 1998,  the Canadian  Investors  converted
their  Preferred  Shares to Neurocrine  Common Stock.  As a result,  the Company
recorded an  investment  in NPI equal to the market value of Common Stock issued
in exchange for the Preferred Shares and has recognized its proportionate  share
of NPI net losses in accordance with the equity method of accounting.

     The Preferred Shares are redeemable for approximately  $9.5 million in cash
at the Company's option.  The redemption  feature of the Preferred Shares limits
their  value to the  balance  of cash and cash  equivalents  maintained  by NPI.
Consequently,  the  Company  reduced  the  value of its NPI  investment  by $3.8
million  during 1998.  Equity in NPI losses was $3.4 million and $1.1 million in
1998 and 1997, respectively.  The balance of the Company's investment in NPI was
$1.4 million and $3.3 million at December 31, 1998 and 1997, respectively.

     During 1996, the Company entered into a sponsored  research  agreement with
NPI.  The terms of the  agreement  called  for NPI to fund  additional  research
efforts on technologies licensed to NPI by the Company. During 1998, the Company
recognized  $3.6  million in revenues  associated  with costs of research on the
Neurogenomics and DHEA programs.


11.   INCOME TAXES

     At December 31, 1998, the Company had federal and California income tax net
operating loss  carryforwards  of  approximately  $9.3 million and $8.3 million,
respectively.  The federal and California tax loss  carryforwards  will begin to
expire in 2009 and 2003,  respectively,  unless previously utilized. The Company
also  has  federal  and  California   research  tax  credit   carryforwards   of
approximately  $1.6  million  and  $271,000,  respectively,  which will begin to
expire in 2007 and 2012,  respectively,  unless previously utilized. The Company
has  federal  Alternative  Minimum  Tax credit  carryforwards  of  approximately
$257,000, which will carryforward indefinitely.

     Pursuant to Internal  Revenue Code Sections 382 and 383,  annual use of the
Company's net operating loss and credit  carryforwards may be limited because of
cumulative  changes in ownership of more than 50% which occurred during 1992 and
1993.  However,  the Company  does not believe  such change will have a material
impact upon the utilization of these carryforwards.

     Significant  components of the Company's deferred tax assets as of December
31, 1998 and 1997 are shown  below.  A valuation  allowance  of  $6,470,000  and
$3,474,000 at December 31, 1998 and 1997, respectively,  have been recognized to
offset the net deferred tax assets as  realization  of such assets is uncertain.
Amounts are shown in thousands as of December 31, of the respective years:
                        
                                             1998       1997
                                           --------   --------
Deferred tax assets:
  Net operating loss carryforwards ....... $ 3,744      $ 993
  Tax credit carryforwards ...............   2,069      1,176
  Capitalized research and development ...     453        525
  Other, net .............................     204        780
                                           --------   --------
  Total deferred tax assets ..............   6,470      3,474
  Valuation allowance ....................  (6,470)    (3,474)
                                           --------   --------
  Net deferred tax assets ................ $    --    $    --
                                           ========   ========

    The provision  for income taxes on earnings  subject to income taxes differs
from the statutory  federal rate at December 31, 1998, 1997 and 1996, due to the
following:
                                                 1998        1997         1996
                                               --------    --------     --------

    Federal income taxes at 34% .............  $(6,785)    $ 1,816       $2,081
    State income tax, net of federal benefit         1          87           --
    Tax effect on non-deductible expenses ...    4,213          21           17
    Increase in valuation allowance and other    2,572      (1,837)      (2,098)
    Alternative minimum taxes ...............       --         127          248
                                              --------    --------      --------
                                               $     1     $   214      $   248
                                              ========    =========     ========

     The provision for taxes based on income at December 31, 1998, 1997 and 1996
consist of the following:

                         1998        1997        1996
                        ------      ------      ------
        Current:
          Federal .....   $ --        $127        $248
          State .......      1          87          --
        Deferred:
          Federal .....     --          --          --
          State .......     --          --          --         
                        ------      ------      ------
          Total .......   $  1        $214        $248
                        ======      ======      ======



12.   Earnings per Share

     The  following  data show the amounts used in computing  earnings per share
and the effect on income and the  weighted-average  number of shares of dilutive
potential common stock (in thousands except for earning per share data):

<TABLE>
<CAPTION>
                                                                    Year Ended December 31,
                                                           ---------------------------------------------

                                                                 1998             1997            1996
                                                              ---------        ---------       ---------
<S>                                                       <C>                   <C>             <C>  
Numerator:
      Net income (loss) .................................     $(19,955)          $5,127          $5,874
      Effect of dilutive securities .....................           --               --              --
                                                              ---------        ---------       ---------
      Numerator for earnings (loss) per share ...........     $(19,955)          $5,127          $5,874
                                                              =========        =========       ========= 
Denominator:
      Denominator for basic earnings (loss) per share ...        18,141          16,930          14,971
      Effect of dilutive securities:
          Employee stock options ........................  Antidilutive             909             796
          Convertible preferred stock ...................  Antidilutive             204             183
          Warrants ......................................  Antidilutive             141             177
                                                           ------------        ---------       ---------
      Dilutive potential of common shares ...............            -            1,254           1,156
                                                              ---------        ---------       ---------
      Denominator for diluted earnings (loss) per share .        18,141          18,184          16,127
                                                              =========        =========       ========= 

      Basic earnings (loss) per share ...................      $  (1.10)         $ 0.30          $ 0.39
      Diluted earnings (loss) per share .................      $  (1.10)         $ 0.28          $ 0.36
</TABLE>


13.       SUBSEQUENT EVENT

     On March 2, 1999, the Company entered into a  collaboration  agreement with
Wyeth-Ayerst Laboratories, the pharmaceutical division of American Home Products
Corporation  on the research,  development  and  commercialization  of compounds
which modulate excitatory amino acid transporters ("EAATs") for the treatment of
neurodegenerative  and  psychiatric  diseases.  The agreement,  valued up to $78
million,  provided that marketable  products for these disorders result from the
collaboration,   includes  sharing  proprietary  technologies  between  the  two
companies;  funding  for  research  and  milestone  achievements  and  potential
royalties on world-wide sales of products resulting from the collaboration.  The
Company  expects to receive  three to five years of  funding  for  research  and
development activities,  in addition to access to Wyeth's chemical libraries for
screening within the collaborative field.








                       COLLABORATION AND LICENSE AGREEMENT



                              DATED JANUARY 1, 1999



                                     BETWEEN


                       AMERICAN HOME PRODUCTS CORPORATION
                               acting through its
                       WYETH-AYERST LABORATORIES DIVISION



                                       AND



                          NEUROCRINE BIOSCIENCES, INC.



<PAGE>


<TABLE>
<CAPTION>
                                TABLE OF CONTENTS

<S>         <C>                                                                                        <C>     
ARTICLE ONE - DEFINITIONS................................................................................1

    1.1    "ACQUISITION".................................................................................1
    1.2    "AFFILIATE"...................................................................................1
    1.3    "COLLABORATION PRODUCTS"......................................................................2
    1.4    "COLLABORATION TECHNOLOGY"....................................................................2
    1.5    "COMBINATION PRODUCT".........................................................................2
    1.6    "COMMERCIALLY REASONABLE EFFORTS".............................................................2
    1.7    "COMPETITION".................................................................................3
    1.8    "COMPETITIVE PRODUCTS"........................................................................3
    1.9    "COMPOUND"....................................................................................3
    1.10   "CONFIDENTIALINFORMATION".....................................................................3
    1.11   "CONTROLS" OR "CONTROLLED".....................................................................4
    1.12   "DEFAULT".....................................................................................4
    1.13   [***}.........................................................................................4
    1.14   "EFFECTIVE DATE"..............................................................................4
    1.15   "EUROPEAN UNION"..............................................................................4
    1.16   "FDA".........................................................................................4
    1.17   "FIELD OF USE"................................................................................4
    1.18   "FTE".........................................................................................4
    1.19   "FIRST COMMERCIAL SALE".......................................................................4
    1.20   "FORCE MAJEURE"...............................................................................4
    1.21   "HIT(S)"......................................................................................5
    1.22   "INTERIM CLINICAL EVALUATION POINT" OR "ICE"...................................................5
    1.23   "IND".........................................................................................5
    1.24   "JOINT CONFIDENTIAL INFORMATION"..............................................................5
    1.25   "JOINT INVENTIONS"............................................................................5
    1.26   "JOINT TECHNOLOGY"............................................................................5
    1.27   "LEAD COMPOUND(S)"............................................................................6
    1.28   "LICENSE FEES"................................................................................6
    1.29   "MAJOR EUROPEAN COUNTRY"......................................................................6
    1.30   "NDA".........................................................................................6
    1.31   "NET SALES"...................................................................................6
    1.32   "NEUROCRINE ANCILLARY TRANSPORTERS"...........................................................9
    1.33   "NEUROCRINE COMPOUND".........................................................................9
    1.34   "NEUROCRINE CONFIDENTIAL INFORMATION".........................................................9
    1.35   "NEUROCRINE INVENTION"........................................................................9
    1.36   "NEUROCRINE MATERIALS"........................................................................9
    1.37   "NEUROCRINE PROPRIETARY CHEMICAL LIBRARY".....................................................9
    1.38   "NEUROCRINE RESEARCHER".......................................................................9
    1.39   "NEUROCRINE TECHNOLOGY"......................................................................10
       (a) "Neurocrine Compound Technology".............................................................10
       (b) "Neurocrine Ancillary Transporter Technology"................................................10
       (c) "Neurocrine Transporter Technology"..........................................................10
    1.40   "NEUROCRINE TRANSPORTERS"....................................................................10
    1.41   "OHSU AGREEMENT".............................................................................10
    1.42   "PARTY"......................................................................................10
    1.43   "PATENT RIGHTS"..............................................................................11
    1.44   "PERSON".....................................................................................11
    1.45   "PIVOTAL TRIAL"..............................................................................11
    1.46   "PRIOR AGREEMENT"............................................................................11
    1.47   "PROOF OF CONCEPT"...........................................................................11
    1.48   "REGULATORY APPROVAL"........................................................................11
    1.49   "REGULATORY AUTHORITY".......................................................................11
    1.50   "REGULATORY FILINGS".........................................................................12
    1.51   "RESEARCH PLAN"..............................................................................12
    1.52   "RESEARCH PROGRAM"...........................................................................12
    1.53   "RESEARCH PROGRAMFUNDING"....................................................................12
    1.54   "RESEARCH PROGRAM MATERIALS".................................................................12
    1.55   "ROYALTIES"..................................................................................12
    1.56   "STEERING COMMITTEE".........................................................................12
    1.57   "TECHNOLOGY".................................................................................12
    1.58   "THIRD PARTY(IES)"...........................................................................12
    1.59   "THIRD PARTY ROYALTIES"......................................................................12
    1.60   "UNPATENTED PRODUCT".........................................................................12
    1.61   "VALID CLAIM"................................................................................13
    1.62   "WYETH-AYERST COMPOUND"......................................................................13
    1.63   "WYETH-AYERST CONFIDENTIAL INFORMATION"......................................................13
    1.64   "WYETH-AYERST INVENTION".....................................................................13
    1.65   "WYETH-AYERSTMATERIALS"......................................................................13
    1.66   "WYETH-AYERST PROPRIETARY CHEMICAL LIBRARY"..................................................13
    1.67   "WYETH-AYERST TECHNOLOGY"....................................................................13

ARTICLE TWO -- REPRESENTATIONS AND WARRANTIES...........................................................14

    2.1    MUTUAL REPRESENTATIONS AND WARRANTIES........................................................14
    2.2    ADDITIONAL NEUROCRINE REPRESENTATIONS, WARRANTIES AND COVENANTS..............................15
    2.3    REPRESENTATION BY LEGAL COUNSEL..............................................................17
    2.4    NEUROCRINE DISCLAIMER........................................................................17
    2.5    WYETH-AYERST DISCLAIMER......................................................................17

ARTICLE THREE -- LICENSES...............................................................................18

    3.1    LICENSE GRANT TO WYETH-AYERST................................................................18
    3.2    LICENSE GRANT TO NEUROCRINE..................................................................19
    3.3    NEUROCRINE RETAINED RIGHTS...................................................................19
    3.4    PRIOR AGREEMENT..............................................................................20
    3.5    OHSU AGREEMENT...............................................................................20

ARTICLE FOUR -- STEERING COMMITTEE......................................................................21

    4.1    CREATION; AUTHORITY..........................................................................21
    4.2    CHAIRPERSON..................................................................................21
    4.3    MEETINGS.....................................................................................21
    4.4    DECISIONS OF THE COMMITTEE...................................................................22

ARTICLE FIVE -- COLLABORATIVE RESEARCH PROGRAM AND RESEARCH FUNDING.....................................22

    5.1    RESEARCH PROGRAM.............................................................................22
    5.2    TERM.........................................................................................22
    5.3    RESEARCH PLAN................................................................................23
    5.4    CONDUCT OF THE RESEARCH PROGRAM..............................................................23
    5.5    FUNDING OF THE RESEARCH PROGRAM..............................................................23
       (a) Funding by Wyeth-Ayerst......................................................................24
       (b)    Reporting and Reconciliation..............................................................24
       (c) Records and Audits...........................................................................25
    5.6    INVENTION ASSIGNMENT AGREEMENTS..............................................................26
    5.7    REPORTING AND DISCLOSURE.....................................................................26
       (a) Reports......................................................................................26
       (b)    Quarterly Meetings........................................................................26
       (c) Disclosure...................................................................................26
    5.8    DATA.........................................................................................26
       (a) Neurocrine Data..............................................................................26
       (b) Wyeth-Ayerst Data............................................................................27
       (c) Other Research Program Data..................................................................27
       (d)    Wyeth-Ayerst Research, Clinical Development and Commercialization Data....................27
    5.9    MATERIALS....................................................................................27
       (a) Research Program Materials...................................................................27
       (b) Neurocrine Materials.........................................................................27
       (c) Wyeth-Ayerst Materials.......................................................................28

ARTICLE SIX -- SELECTION OF LEAD COMPOUNDS AND COLLABORATION PRODUCTS...................................28

    6.1    SELECTION OF LEAD COMPOUNDS DURING TERM RESEARCH PROGRAM.....................................28
    6.2    SELECTION OF LEAD COMPOUNDS AFTER TERM RESEARCH PROGRAM......................................29
    6.3    SELECTION OF COLLABORATION PRODUCTS..........................................................29
    6.4    DESIGNATION OF LEAD COMPOUNDS AND COLLABORATION PRODUCTS.....................................29

ARTICLE SEVEN - DEVELOPMENT, MANUFACTURING AND COMMERCIALIZATION........................................30

    7.1    WYETH-AYERST DEVELOPMENT.....................................................................30
    7.2    PROGRESS REPORTS.............................................................................30
    7.3    MANUFACTURING................................................................................30
    7.4    COMMERCIALIZATION OF COLLABORATION PRODUCTS..................................................30
    7.5    CO-PROMOTION.................................................................................31

ARTICLE EIGHT - LICENSE FEES............................................................................31

    8.1    LICENSE FEES.................................................................................31
    8.2    ADDITIONAL LICENSE FEES......................................................................33

ARTICLE NINE - ROYALTIES................................................................................37

    9.1    ROYALTY RATES................................................................................37
    9.2    ROYALTY ADJUSTMENTS..........................................................................39
       (a) Royalty Adjustment for Unpatented Products...................................................39
       (b) Competition..................................................................................39
    9.3    TERM OF ROYALTY..............................................................................40
    9.4    REPORTS AND PAYMENTS.........................................................................40
       (a) Cumulative Royalties.........................................................................40
       (b)    Statements and Payments...................................................................40
       (c) Taxes and Withholding........................................................................41
       (d)    Currency..................................................................................41
       (e) Maintenance of Records; Audit................................................................41
    9.5    THIRD PARTY PAYMENTS.........................................................................42
       (a) OHSU Agreement...............................................................................42
       (b) Neurocrine Technology........................................................................43
       (c) Collaboration Products.......................................................................43
       (d)  Third Party Licenses........................................................................44

ARTICLE TEN -- CONFIDENTIALITY, PUBLICATION AND PUBLIC ANNOUNCEMENTS....................................44

    10.1   CONFIDENTIALITY..............................................................................44
    10.2   AUTHORIZED DISCLOSURE........................................................................45
       (a) Each Party...................................................................................45
       (b)    Use.......................................................................................46
    10.3   SEC FILINGS..................................................................................46
    10.4   PUBLICATIONS.................................................................................46
    10.5   PUBLIC ANNOUNCEMENTS.........................................................................46
       (a) Coordination.................................................................................46
       (b) Announcements................................................................................47

ARTICLE ELEVEN - INDEMNIFICATION........................................................................47

    11.1   INDEMNIFICATION BY WYETH-AYERST..............................................................47
    11.2   INDEMNIFICATION BY NEUROCRINE................................................................47
    11.3   PROCEDURE....................................................................................48
    11.4   INSURANCE....................................................................................49

ARTICLE TWELVE - TERM AND TERMINATION...................................................................49

    12.1   GOVERNMENT APPROVALS.........................................................................49
       (a) Government Approvals.........................................................................49
       (b)    Co-operation..............................................................................49
    12.2   TERM.........................................................................................49
    12.3   EARLY TERMINATION FOR FAILURE TO DEMONSTRATE PROOF  OF CONCEPT...............................49
    12.4   TERMINATION OF COLLABORATION PRODUCT DEVELOPMENT AND COMMERCIALIZATION.......................50
    12.5   DEFAULT......................................................................................54
       (a) Wyeth-Ayerst.................................................................................54
       (b) Neurocrine...................................................................................57
    12.6   BANKRUPTCY...................................................................................58
       (a) Neurocrine...................................................................................59
       (b) Wyeth-Ayerst.................................................................................59
    12.7   ACQUISITION..................................................................................60
    12.8   LIABILITIES..................................................................................61
    12.9   DISCLAIMER...................................................................................61

ARTICLE THIRTEEN - INTELLECTUAL PROPERTY................................................................61

    13.1   INVENTIONS...................................................................................61
    13.2   PATENT PROSECUTION...........................................................................62
       (a)  Wyeth-Ayerst Inventions and Collaboration Products..........................................62
       (b) OHSU Licensed Patent Rights..................................................................62
       (c)  Neurocrine Inventions.......................................................................62
       (d)  Joint Inventions............................................................................62
    13.3   ENFORCEMENT OF PATENT RIGHTS.................................................................62
       (a) Wyeth-Ayerst Inventions......................................................................62
       (b)    Neurocrine Inventions and Joint Inventions................................................63
       (c) OHSU Licensed Patent Rights..................................................................63
       (d)    Neurocrine Technology.....................................................................64


</TABLE>

                                    EXHIBITS

Exhibit A -- TRANSPORTERS
Exhibit B -- LEAD COMPOUND AND PROOF OF CONCEPT
Exhibit C -- PATENT RIGHTS
Exhibit D -- OHSU AGREEMENT
Exhibit E -- THIRD PARTY PATENTS
Exhibit F -- OTHER NEUROCRINE OBLIGATIONS



<PAGE>




                       COLLABORATION AND LICENSE AGREEMENT

         THIS COLLABORATION AND LICENSE AGREEMENT (the "Agreement"), dated as of
January 1, 1999, is made by and between Neurocrine Biosciences, Inc., a Delaware
corporation with its principal place of business at 10555 Science Park Road, San
Diego,   California   92121-1102   ("Neurocrine")  and  American  Home  Products
Corporation,  acting through its Wyeth-Ayerst  Laboratories Division, a Delaware
corporation,  with a place of business at 555 East  Lancaster  Avenue St. Davids
Pennsylvania 19087 ("Wyeth-Ayerst").

     WHEREAS,   Wyeth-Ayerst  is  engaged  in  the  research,   development  and
commercialization of human pharmaceutical products;

         WHEREAS,  Neurocrine is the owner or licensee of certain  patent rights
relating to [***] which may be useful in the discovery and  development of human
pharmaceutical products;

         WHEREAS, Wyeth-Ayerst and Neurocrine have agreed to collaborate, on the
terms  and  conditions  set  forth  herein,  in the  research,  development  and
commercialization of compounds [***] (each as defined below);

         NOW,  THEREFORE,   in  consideration  of  the  mutual  representations,
warranties  and  covenants   contained   herein  and  other  good  and  valuable
consideration, the Parties agree as follows:


                                   ARTICLE ONE
                                   DEFINITIONS

         When used in this Agreement,  each of the following  capitalized  terms
shall  have the  meanings  set forth in this  Article  One.  Any  terms  defined
elsewhere in this Agreement shall be given equal weight and importance as though
set forth in this Article One.

1.1      "Acquisition"  shall mean with respect to Neurocrine,  the acquisition,
         directly or indirectly, by any Third Party of (i) securities authorized
         to cast fifty  percent  (50%) or more of the votes in any  election  of
         directors   and/or   (ii)  the  sale  or  other   transfer  of  all  or
         substantially  all of its assets.  Notwithstanding  the foregoing,  the
         sale or other transfer of substantially all of the assets of Neurocrine
         to another  direct or indirect  wholly-owned  subsidiary  of Neurocrine
         shall not constitute an Acquisition.

1.2      "Affiliate" shall mean a Person that,  directly or indirectly,  through
         one or more  intermediates,  controls,  is  controlled  by, or is under
         common  control  with the Person  specified.  For the  purposes of this
         definition, control shall mean the direct or indirect ownership of, (a)
         in the case of corporate entities,  securities  authorized to cast more
         than fifty  percent (50%) of the votes in any election for directors or
         (b) in the case of  non-corporate  entities,  more than  fifty  percent
         (50%)  ownership  interest with the power to direct the  management and
         policies of such non-corporate  entity.  Notwithstanding the foregoing,
         the term "Affiliate" shall not include subsidiaries in which a Party or
         its Affiliates  owns a majority of the ordinary voting power to elect a
         majority of the board of  directors,  but is  restricted  from electing
         such  majority  by  contract  or  otherwise,  until  such  time as such
         restrictions are no longer in effect.

1.3      "Collaboration  Products"  shall mean products  containing  one or more
         Lead Compounds as an active ingredient(s),  provided,  however, that if
         (i) none of the Compounds contained in a product are encompassed within
         the Collaboration  Technology and (ii) such product is not developed by
         Wyeth-Ayerst,  its  Affiliates or  sublicensees  for any  indication in
         which   the   [***]   and   (iii)   identification,   development   and
         commercialization  of  such  product  does  not  utilize  Collaboration
         Technology,  then such product shall not be a Collaboration Product for
         purposes of this  Agreement.  For the  purposes  of License  Fees under
         Article Eight below and Royalty  payments under Article Nine below, all
         formulations (e.g., tablets, gel caps, topical formulations, parenteral
         formulations,  sustained release formulations, etc.) of a Collaboration
         Product  will  be  considered  to be the  same  Collaboration  Product,
         regardless of the indications for which such Collaboration  Product may
         be used.

1.4      "Collaboration Technology" shall mean all Technology encompassed by the
         Neurocrine Technology, Wyeth-Ayerst Technology and Joint Technology.

1.5      "Combination  Product"  shall mean a product that  contains,  as active
         ingredients one or more Lead Compounds (or Collaboration  Products) and
         one  or  more  other   Compounds   that  are  not  Lead  Compounds  (or
         Collaboration Products).

1.6      "Commercially  Reasonable  Efforts"  shall mean  efforts and  resources
         commonly used by a Party (which efforts will be no less than those used
         by such Party in the  research  and  development  of its  products,  as
         described  below, in the one year period  preceding the Effective Date)
         for a product  owned by it or to which it has rights,  which product is
         at a similar stage in its development or product life and is of similar
         market  potential  taking into  account  efficacy,  safety,  Regulatory
         Authority  approved  labeling,   the   competitiveness  of  alternative
         products in the marketplace,  the patent and other proprietary position
         of the  product,  the  likelihood  of  Regulatory  Approval  given  the
         regulatory  structure  involved,   the  profitability  of  the  product
         including  the  royalties   payable  to  licensors  of  patent  rights,
         alternative   products  and  other   relevant   factors.   Commercially
         Reasonable Efforts shall be determined on a market-by-market  basis for
         a particular  product,  and it is anticipated  that the level of effort
         will  change  over  time,  reflecting  changes  in  the  status  of the
         Collaboration Product and the market involved.

1.7      "Competition"  shall exist during a given calendar quarter with respect
         to a  Collaboration  Product  in a  county  if,  during  such  calendar
         quarter,  one  or  more  Competitive  Products  shall  be  commercially
         available  in such  country and shall have in the  aggregate a [***] or
         greater  share of the  total  market  (based  on data  provided  by IMS
         International,  or if such data are not available,  based on such other
         data mutually agreed to by Wyeth-Ayerst and Neurocrine) in that country
         as measured by unit sales.  For purposes of this agreement,  the "total
         market" in a country shall be the sum of (x) the number of units of the
         affected  Collaboration  Product sold during such  calendar  quarter in
         such country by  Wyeth-Ayerst,  its Affiliates and sublicensees and (y)
         the number of units of Competitive Products sold in such country during
         such calendar quarter.

1.8      "Competitive  Products"  shall mean and  include  products  (other than
         Collaboration  Products  developed and  commercialized  by Wyeth-Ayerst
         pursuant to this  Agreement)  that contain  principally the same active
         chemical  entity(ies)  as a  Collaboration  Product  and  which (a) act
         through  the same  mechanism  as a  Collaboration  Product  and (b) can
         reasonably  be or are  reasonably  used  for the same  indication  as a
         Collaboration Product.  Without limitation of the foregoing,  compounds
         that  are  of  the  same  general  formulation  type  (i.e.,  oral  vs.
         parenteral vs. topical) as a  Collaboration  Product would generally be
         considered  Competitive Products while compounds of a different general
         formulation  type from a  Collaboration  Product would generally not be
         considered  Competitive  Products unless the compound and Collaboration
         Product  are  reasonably  used  (other  than de minimis  usage) for the
         treatment of the same indication.

1.9      "Compound"  shall mean a chemical  compound or substance  together with
         all complexes, mixtures and other combinations,  prodrugs, metabolites,
         enantiomers, salt forms, racemates, and isomers thereof.

1.10     "Confidential  Information"  shall  mean with  respect  to each  Party,
         non-public  proprietary data or information which belong in whole or in
         part  to such  Party  and/or  information  designated  as  Confidential
         Information of such Party hereunder.

1.11     "Controls" or "Controlled"  shall mean with respect to Technology,  the
         possession  of the  ability to grant  licenses or  sublicenses  without
         violating the terms of any agreement or other  arrangement with, or the
         rights of, any Third Party.

1.12     "Default"   shall   mean  with   respect   to  a  Party  that  (i)  any
         representation  or warranty of such Party set forth  herein  shall have
         been untrue in any material  respect when made or (ii) such Party shall
         have  failed  to  perform  any  material  obligation  set forth in this
         Agreement.

1.13     [***] shall be as defined in Exhibit A.

1.14     "Effective Date" shall mean January 1, 1999.

1.15     "European  Union" shall mean, from time to time,  those countries that
         are members of the European Union.

1.16     "FDA" shall mean the Federal Food and Drug Administration of the United
         States  Department of Health and Human Services or any successor agency
         thereof.

1.17     "Field of Use" shall mean all therapeutic, prophylactic and diagnostic
         uses.

1.18     "FTE" shall mean full time equivalent scientific person year consisting
         of a  minimum  of a  total  [***]  per  year of  scientific  work on or
         directly related to the Research  Program.  Work on or directly related
         to  the  Research   Program  can  include,   but  is  not  limited  to,
         experimental   laboratory  work,  recording  and  writing  up  results,
         reviewing  literature and references,  holding scientific  discussions,
         managing and leading  scientific staff,  carrying out management duties
         related  to  the  Research  Program,  and to  the  extent  specifically
         approved  by  Wyeth-Ayerst,  writing up  results  for  publications  or
         presentation  and  attending  or  presenting  appropriate  seminars and
         symposia.

1.19     "First  Commercial  Sale" shall mean with respect to any  Collaboration
         Product   approved  for   commercial   sale,   the  first  transfer  by
         Wyeth-Ayerst,   its   Affiliates   and/or  its   sublicensees   of  the
         Collaboration  Product to a  non-Affiliate  Third Party in exchange for
         cash or some equivalent to which value can be assigned.

1.20     "Force Majeure" shall mean any occurrence beyond the reasonable control
         of  a  Party  that  prevents  or  substantially   interferes  with  the
         performance by the Party of any of its obligations  hereunder,  if such
         occurs by reason of any act of God, flood, fire, explosion, earthquake,
         strike,   lockout,  labor  dispute,   casualty  or  accident;  or  war,
         revolution,  civil  commotion,  acts of  public  enemies,  blockage  or
         embargo;  or any  injunction,  law,  order,  proclamation,  regulation,
         ordinance,   demand  or   requirement  of  any  government  or  of  any
         subdivision,  authority or  representative  of any such government;  or
         breakdown  of plant,  inability  to  procure or use  materials,  labor,
         equipment,  transportation,  or energy sufficient to meet manufacturing
         needs  without  the  necessity  of  allocation;   or  any  other  cause
         whatsoever,  whether  similar or dissimilar to those above  enumerated,
         beyond the reasonable  control of such Party,  if and only if the Party
         affected shall have used  reasonable  efforts to avoid such  occurrence
         and to remedy it promptly if it shall have occurred.

1.21     "Hit(s)" shall mean Compounds  derived from the Neurocrine  Proprietary
         Chemical Library, the Wyeth-Ayerst  Proprietary Chemical Library or any
         other  library  selected  by the  Parties,  which are  screened  in the
         conduct of the Research  Program and test positive in screening  assays
         [***]. For the purposes of this definition, the Steering Committee will
         determine  what shall  constitute  a positive  test with respect to any
         screening   assays  selected  for  the  Research   Program  and  it  is
         anticipated  that,  depending on results  obtained in the course of the
         Research Program, what constitutes a positive test may change from time
         to time.

1.22     "Interim  Clinical  Evaluation Point" or "ICE" shall mean, with respect
         to any  Collaboration  Product,  the development  milestone  indicating
         [***], as decided by Wyeth-Ayerst's  Development  Operating  Committee.
         [***]. In addition, [***].  Notwithstanding the foregoing, in the event
         Wyeth-Ayerst shall make the decision [***], ICE shall be deemed to have
         been met.

1.23     "IND" shall mean an  Investigational  New Drug  Application  covering a
         Collaboration  Product  filed with the FDA pursuant to 21 CFR 312.20 or
         an equivalent  foreign  filing  required for the clinical  testing of a
         pharmaceutical product.

1.24     "Joint  Confidential  Information" shall mean Confidential  Information
         owned jointly by Wyeth-Ayerst and Neurocrine or otherwise designated as
         Joint Confidential Information hereunder.

1.25     "Joint Inventions" shall be as defined in Section 13.1 hereof.

1.26     "Joint  Technology"  shall  mean  Technology,  which is  discovered  or
         invented  jointly by Neurocrine  personnel and  Wyeth-Ayerst  personnel
         during the term of this Agreement.

1.27     "Lead Compound(s)" shall mean those Compounds (i) [***], (ii) that meet
         the  criteria set forth on Exhibit B hereto and (iii) that are selected
         by the Steering  Committee or  Wyeth-Ayerst  in accordance with Article
         Six, provided,  however, that Lead Compounds shall specifically exclude
         any Compounds  [***].  Notwithstanding  the foregoing,  for purposes of
         calculating Net Sales and determining License Fees and Royalty payments
         under this  Agreement,  a Lead Compound  together  with all  complexes,
         mixtures and other combinations,  prodrugs,  metabolites,  enantiomers,
         salt forms,  racemates,  isomers,  and  derivatives  thereof,  shall be
         considered to be a single Lead Compound.

1.28     "License Fees" shall mean the payments to be made by  Wyeth-Ayerst  to
         Neurocrine upon occurrence of certain events as set forth in Article
         Eight.

1.29     "Major  European  Country"  shall mean France,  Germany,  Italy or the
         United Kingdom.

1.30     "NDA"  shall  mean  a  New  Drug  Application  (or  Biologics   License
         Application, if applicable) covering a Collaboration Product filed with
         the FDA pursuant to 21 CFR 314 or an equivalent foreign filing required
         for marketing approval of a pharmaceutical product.

1.31     "Net Sales" shall mean,  with respect to a Collaboration  Product,  all
         proceeds  actually  received  from the sale or other  disposition  of a
         Collaboration  Product by Wyeth-Ayerst,  its Affiliates or sublicensees
         to  unrelated   Third  Parties,   less  the  reasonable  and  customary
         deductions  from such gross amounts  actually paid by or charged to the
         account of Wyeth-Ayerst, including, without limitation,


                  (a)      trade, cash and quantity  discounts actually allowed 
                           and taken directly with respect to such sales;

                  (b)      amounts  repaid,   credits  or  allowances   actually
                           granted for damaged goods, defects,  recalls, returns
                           or   rejections   of   Collaboration    Product   and
                           retroactive price reductions;

                  (c)      sales or similar taxes actually paid by or charged to
                           the  account  of  Wyeth-Ayerst,   its  Affiliates  or
                           sublicensees   without  offset  (including,   without
                           limitation,  duties  or  other  governmental  charges
                           levied on, absorbed or otherwise  imposed on the sale
                           of Collaboration  Product, value added taxes or other
                           governmental   charges  otherwise   measured  by  the
                           billing  amount,  when  included in billing,  but not
                           including  national,  state or local  taxes  based on
                           income);

                  (d)      charge  back  payments  and  rebates  granted  to (i)
                           managed  health  care  organizations,  (ii)  federal,
                           state and/or  local  governments  or their  agencies,
                           (iii)  purchasers  and  reimbursers,  or  (iv)  trade
                           customers, including, without limitation, wholesalers
                           and chain and pharmacy buying groups; and

                  (e)      freight,  postage,   shipping,   customs  duties  and
                           insurance  charges  to  the  extent  included  in the
                           proceeds actually received from the customer.

         For the purposes of  determining  Net Sales  hereunder,  a  sublicensee
         shall  include  a  Third  Party  who,  pursuant  to an  agreement  with
         Wyeth-Ayerst,  distributes Collaboration Products, provided, such Third
         Party also, as required by such agreement,  conducts  promotion  and/or
         marketing  activities in the applicable  territory.  Net Sales shall be
         determined  in  accordance  with  United  States   generally   accepted
         accounting principles consistently applied. A "sale" shall also include
         the  transfer  or other  disposition  of a  Collaboration  Product  for
         consideration other than cash, in which case such consideration will be
         valued  at  the  fair  market  value  thereof.  In  the  event  that  a
         Collaboration  Product is sold either for consideration other than cash
         or as part of a bundled  product,  the Net Sales of such  Collaboration
         Product  will be  calculated  based on the  average  unit price of such
         Collaboration  Product  when sold  (other  than as part of a bundle) in
         cash   transactions   in  such  country.   In  the  event  that,  on  a
         country-by-country  basis, a Collaboration  Product is sold in the form
         of a Combination  Product,  the Net Sales for such Combination  Product
         will be calculated as follows:

                   (i)      If Wyeth-Ayerst,  its Affiliates and/or sublicensees
                            separately sells, in such country, (x) Collaboration
                            Products    containing    as   their   sole   active
                            ingredient(s)  the  same  Lead  Compound(s)  as  are
                            contained in such Combination  Product and (y) other
                            products    containing    as   their   sole   active
                            ingredient(s)   the  other   active   component   or
                            components  in  such  Combination  Product,  the Net
                            Sales attributable to such Combination Product shall
                            be calculated by multiplying actual Net Sales of the
                            Combination    Product   by   the    [***],    which
                            Collaboration  Product contains,  as the sole active
                            ingredient(s),  the same Lead  Compound(s) as are in
                            such Combination Product and [***], which product(s)
                            contain,  as their  sole  active  ingredient(s)  any
                            other  active   component  or   components   in  the
                            Combination Product.

                   (ii)     If Wyeth-Ayerst,  its Affiliates and/or sublicensees
                            separately  sells,  in such  country,  Collaboration
                            Products    containing    as   their   sole   active
                            ingredient(s)  the  same  Lead  Compound(s)  as  are
                            contained  in such  Combination  Product  but do not
                            separately  sell,  in such country,  other  products
                            containing  as their sole active  ingredient(s)  the
                            other  active   component  or   components  in  such
                            Combination  Product,  the Net Sales attributable to
                            such  Combination  Product  shall be  calculated  by
                            multiplying  the  Net  Sales  of  such   Combination
                            Product by the [***],  which  Collaboration  Product
                            contains, as the sole active ingredient(s), the same
                            Lead Compound(s) as are in such Combination Product,
                            [***].
                  (iii)    If Wyeth-Ayerst,  its Affiliates and/or  sublicensees
                           do   not   separately    sell,   in   such   country,
                           Collaboration   Products  containing  as  their  sole
                           active ingredient(s) the same Lead Compound(s) as are
                           contained in such Combination  Product, the Net Sales
                           attributable  to such  Combination  Product  shall be
                           calculated  by  multiplying  the  Net  Sales  of such
                           Combination Product by the [***].

         Notwithstanding  the  foregoing,   Net  Sales  shall  not  include  any
         consideration received by Wyeth-Ayerst,  its Affiliates or sublicensees
         in respect of the sale,  use or other  disposition  of a  Collaboration
         Product in a country as part of a clinical  trial  prior to the receipt
         of all Regulatory  Approvals required to commence full commercial sales
         of such Collaboration Product in such country.

1.32     "Neurocrine Ancillary  Transporters" shall mean [***] as defined on 
         Exhibit A.

1.33     "Neurocrine Compound" shall mean any Compound,  which is (a) within the
         Neurocrine  Proprietary Chemical Library, and (b) is screened under the
         Research  Program  for  activity  against the  Neurocrine  Transporters
         together with all complexes, mixtures and other combinations, prodrugs,
         metabolites, enantiomers, salt forms, racemates, and isomers thereof.

1.34     "Neurocrine   Confidential   Information"   shall   mean   Confidential
         Information  owned by Neurocrine or otherwise  designated as Neurocrine
         Confidential   Information   hereunder  but  shall  not  include  Joint
         Confidential Information.

1.35     "Neurocrine Invention" shall have the meaning set forth in Section 13.1
         hereof.

1.36     "Neurocrine  Materials"  shall  mean  Neurocrine  proprietary  research
         materials  including,  but not limited to,  Neurocrine  Compounds,  the
         Neurocrine Proprietary Chemical Library,  assays, physical databases of
         chemical structures of Compounds in the Neurocrine Proprietary Chemical
         Library, reagents and materials derived therefrom. Neurocrine Materials
         will  not  include  Research  Program  Materials.  Neurocrine  will own
         Neurocrine Materials supplied by Neurocrine to Wyeth-Ayerst hereunder.

1.37     "Neurocrine  Proprietary  Chemical  Library" shall mean those Compounds
         that  Neurocrine,  as of the Effective  Date owns or Controls,  or that
         come into Neurocrine's Control during the term of the Research Program.

1.38     "Neurocrine   Researcher"  shall  mean  professional   researchers  and
         scientists  employed  by  Neurocrine  and  having at least a  Bachelors
         Degree in science and other academic  and/or  professional  credentials
         demonstrating  reasonably  appropriate  expertise  for  the  task to be
         performed by such  Neurocrine  Researcher  in carrying out the Research
         Plan.

1.39     "Neurocrine  Technology" shall mean the Neurocrine Compound Technology,
         Neurocrine   Ancillary   Transporter   Technology  and  the  Neurocrine
         Transporter Technology, each as defined below.

                  (a)      "Neurocrine   Compound  Technology"  shall  mean  all
                           Technology  (other  than Joint  Technology)  owned or
                           Controlled by Neurocrine on the Effective Date and/or
                           during the term of this  Agreement,  which (i) claims
                           or  describes  Lead  Compounds  and/or  Collaboration
                           Products  and/or  (ii) is  developed,  discovered  or
                           invented by Neurocrine in the conduct of the Research
                           Program  and/or  (iii)  is  necessary  or  useful  to
                           develop,  make,  use or sell  Lead  Compounds  and/or
                           Collaboration Products.

                  (b)      "Neurocrine Ancillary  Transporter  Technology" shall
                           mean all  Technology  (other  than Joint  Technology)
                           owned or  Controlled  by  Neurocrine on the Effective
                           Date or during the term of the Research  Program that
                           claims,  describes  or  relates  to  the  use  of the
                           Neurocrine Ancillary Transporters.

                  (c)      "Neurocrine  Transporter  Technology"  shall mean all
                           Technology  (other  than Joint  Technology)  owned or
                           Controlled by  Neurocrine  on the  Effective  Date or
                           during the term of the Research  Program that claims,
                           describes  or  relates  to the use of the  Neurocrine
                           Transporters.  Neurocrine Transporter Technology will
                           specifically include, without limitation,  the Patent
                           Rights set forth on Exhibit C hereto.

1.40 "Neurocrine Transporters" shall mean [***] as defined on Exhibit A.

1.41     "OHSU Agreement" shall mean the Amended and Restated License  Agreement
         dated January 1, 1999 by and between Oregon Health Sciences  University
         ("OHSU") and  Neurocrine (a complete copy of which has been provided to
         and  approved  by  Wyeth-Ayerst  prior to the date this  Agreement  was
         signed by the Parties  and which is  attached  hereto as Exhibit D), as
         such agreement may be amended from time to time (subject to the consent
         of  Wyeth-Ayerst  to the  extent  required  under the  Agreement  dated
         January 1, 1999 by and among OHSU, Wyeth-Ayerst and Neurocrine.)

1.42     "Party" shall mean Wyeth-Ayerst or Neurocrine, as the case may be, and 
         "Parties" shall mean Wyeth-Ayerst and Neurocrine.

1.43     "Patent  Rights"  shall  mean the rights  and  interests  in and to all
         issued  patents  and  pending  patent   applications  in  any  country,
         including,    without   limitation,   all   provisional   applications,
         substitutions,  continuations,  continuations-in-part,  divisions,  and
         renewals,    all   letters    patent   granted    thereon,    and   all
         patents-of-addition,   reissues,   reexaminations   and  extensions  or
         restorations by existing or future extension or restoration mechanisms,
         including,  without limitation Supplementary Protection Certificates or
         the equivalent thereof.

1.44     "Person" shall mean any  individual,  firm,  corporation,  partnership,
         limited liability company, trust,  unincorporated organization or other
         entity or a government  agency or political  subdivision  thereto,  and
         shall include any successor (by merger or otherwise) of such Person.

1.45     "Pivotal  Trial" shall mean clinical  trial which,  if the  pre-defined
         endpoints  are  met,  is  intended  to  be  submitted  as  part  of  an
         application for marketing approval as statistically significant data in
         support  of  the  product's   safety  and  efficacy  for  the  intended
         indication.

1.46     "Prior Agreement" shall mean the agreement dated August 15, 1996 by and
         between Northwest NeuroLogic, Inc. and Wyeth-Ayerst, as amended.

1.47     "Proof of Concept" shall mean, with respect to either of the Neurocrine
         Transporters,  the successful achievement of both the in vitro Proof of
         Concept and the in vivo Proof of Concept  criteria for such  Neurocrine
         Transporter, as set forth in Exhibit B.

1.48     "Regulatory Approval" shall mean the technical,  medical and scientific
         licenses,  registrations,   authorizations  and  approvals  (including,
         without limitation, approvals of NDAs, supplements and amendments, pre-
         and post- approvals,  pricing and third party reimbursement  approvals,
         and labeling  approvals)  of any  national,  supra-national,  regional,
         state or  local  regulatory  agency,  department,  bureau,  commission,
         council or other  governmental  entity,  necessary for the development,
         manufacture,  distribution,  marketing, promotion, offer for sale, use,
         import, export or sale of Lead Compounds or Collaboration Product(s) in
         a regulatory jurisdiction.

1.49     "Regulatory  Authority"  shall  mean  any  national  (e.g.,  the  FDA),
         supra-national  (e.g.,  the  European  Commission,  the  Council of the
         European  Union, or the European Agency for the Evaluation of Medicinal
         Products),  regional,  state or local  regulatory  agency,  department,
         bureau,  commission,  council  or  other  governmental  entity  in each
         country  of the  Territory  involved  in  the  granting  of  Regulatory
         Approval for a Lead Compound or a Collaboration Product.

1.50     "Regulatory Filings" shall mean, collectively,  INDs, Biologics License
         Applications,  Drug  Master  Files,  NDAs  and/or any other  comparable
         filings  as  may  be  required  by  Regulatory  Authorities  to  obtain
         Regulatory Approvals.

1.51     "Research Plan" will be as defined in Section 5.3 below.

1.52     "Research  Program"  shall  mean  the  collaborative  research  program
         conducted  by  Neurocrine  and  Wyeth-Ayerst  and funded,  in part,  by
         Wyeth-Ayerst in accordance with the provisions of Article Five below.

1.53     "Research Program Funding" will be as defined in Section 5.5 below.

1.54     "Research Program Materials" shall mean and include clones, cell lines,
         Compounds,  assays,  databases,  electronic  and physical  databases of
         chemical  structures  which,  in each case, are developed by Neurocrine
         and/or  Wyeth-Ayerst  during  the  course of  conduct  of the  Research
         Program.  Research  Program  Materials also will include the Neurocrine
         Transporters and Neurocrine  Ancillary  Transporters  and clones,  cell
         lines and other materials encompassing,  expressing,  and/or containing
         the Neurocrine Transporters and/or Neurocrine Ancillary Transporters.

1.55     "Royalties"  shall mean those  royalties  payable  by  Wyeth-Ayerst  to
         Neurocrine pursuant to Article Nine of this Agreement.

1.56     "Steering  Committee"  shall have the  meaning set forth in Section 4.1
         hereof.

1.57     "Technology"   shall  mean  proprietary   data,   information  and  all
         intellectual  property,  including  but not limited to, trade  secrets,
         know-how,  inventions and  technology,  whether  patentable or not, and
         Patent  Rights  directed to products,  processes,  formulations  and/or
         methods.
1.58  "Third   Party(ies)"   shall  mean  any  Person  other  than   Neurocrine,
Wyeth-Ayerst and their respective Affiliates.

1.59     "Third Party  Royalties"  shall mean  royalties  payable by Neurocrine,
         Wyeth-Ayerst,  its Affiliates or sublicensees to a non-Affiliate  Third
         Party (or multiple  non-Affiliate  Third  Parties) to make,  have made,
         use, sell,  offer for sale or import  Collaboration  Products where the
         royalty  payable to such  non-Affiliate  Third Party is based on Patent
         Rights owned or Controlled by such Third Party.

1.60     "Unpatented  Product"  shall mean a  Collaboration  Product the making,
         using or sale of which is not  claimed  or  described  in at least  one
         Valid Claim included in the Collaboration Technology.

1.61     "Valid Claim" shall mean a claim of an issued and unexpired patent or a
         claim of a pending patent  application  which has not been held invalid
         or  unenforceable  by a court or other  government  agency of competent
         jurisdiction  from which no appeal can be or has been taken and has not
         been admitted to be invalid or unenforceable through  re-examination or
         disclaimer  or  otherwise,  provided,  however,  that if a  claim  of a
         pending patent application shall not have issued within [***] after the
         filing date from which such claim takes  priority  such claim shall not
         constitute a Valid Claim for the purposes of this Agreement.

1.62     "Wyeth-Ayerst Compound" shall mean any Compound (a) which is within the
         Wyeth-Ayerst  Proprietary  Chemical  Library  and (b) which is screened
         under the Research Program or by Wyeth-Ayerst  under this Agreement for
         activity against a Neurocrine  Transporter together with all complexes,
         mixtures and other combinations,  prodrugs,  metabolites,  enantiomers,
         salt forms, racemates, and isomers thereof.

1.63     "Wyeth-Ayerst   Confidential   Information"   shall  mean  Confidential
         Information   owned  by   Wyeth-Ayerst   or  otherwise   designated  as
         Wyeth-Ayerst  Confidential  Information hereunder but shall not include
         Joint Confidential Information.

1.64     "Wyeth-Ayerst  Invention"  shall have the  meaning set forth in Section
         13.1 hereof.

1.65     "Wyeth-Ayerst  Materials" shall mean Wyeth-Ayerst  proprietary research
         materials including,  but not limited to, Wyeth-Ayerst  Compounds,  the
         Wyeth-Ayerst  Proprietary Chemical Library,  assays, physical databases
         of chemical  structures  of Compounds in the  Wyeth-Ayerst  Proprietary
         Chemical   Library,   reagents   and   materials   derived   therefrom.
         Wyeth-Ayerst  Materials will not include  Research  Program  Materials.
         Wyeth-Ayerst  will own  Wyeth-Ayerst  Materials  provided to Neurocrine
         hereunder.

1.66    "Wyeth-Ayerst  Proprietary  Chemical Library" shall mean those Compounds
        that Wyeth-Ayerst,  as of the Effective Date, owns or Controls,  or that
        come into Wyeth-Ayerst's Control during the term of this Agreement,  and
        any  other   Compounds  not  Controlled  by   Wyeth-Ayerst,   but  which
        Wyeth-Ayerst  has the right to  develop  and  commercialize,  including,
        without  limitation,  the right to screen such  Compounds  for  activity
        against the Neurocrine  Transporters  without violating the terms of any
        agreement between Wyeth-Ayerst and a Third Party.

1.67    "Wyeth-Ayerst  Technology"  shall mean all Technology  (other than Joint
        Technology)  owned or Controlled by  Wyeth-Ayerst  on the Effective Date
        and/or during the term of this Agreement (a) which relates  specifically
        to, claims or describes Lead  Compounds  and/or  Collaboration  Products
        and/or (b) is developed,  discovered or invented by  Wyeth-Ayerst in the
        conduct  of the  Research  Program,  (c)  is  developed,  discovered  or
        invented by Wyeth-Ayerst  personnel  directly  resulting from the use of
        Neurocrine  Technology  or Joint  Technology  and/or (d) is necessary or
        useful  to  make,  use  or  sell  Lead  Compounds  and/or  Collaboration
        Products.


                                   ARTICLE TWO
                         REPRESENTATIONS AND WARRANTIES

2.1      Mutual  Representations  and Warranties.  Each Party hereby represents,
         warrants and covenants to the other Party that:

         (a)      the execution,  delivery to the other Party and performance by
                  it of this  Agreement  and its  compliance  with the terms and
                  provisions of this  Agreement  does not and will not conflict,
                  in any material respect,  with or result in a breach of any of
                  the  terms  or  provisions   of  (x)  any  other   contractual
                  obligations of such Party,  (y) the provisions of its charter,
                  operating  documents  or  bylaws,  or  (z)  any  order,  writ,
                  injunction  or decree of any court or  governmental  authority
                  entered  against it or by which it or any of its  property  is
                  bound  except   where  such  breach  or  conflict   would  not
                  materially  impact the Party's ability to meet its obligations
                  hereunder,  and (ii) it has not granted to any Third Party any
                  right which would  conflict in any  material  respect with the
                  rights granted by it to the other Party hereunder;

         (b)      this  Agreement is a legal and valid  obligation  binding upon
                  such Party and enforceable in accordance with its terms except
                  as  (i)   enforceability   may  be  limited   by   bankruptcy,
                  insolvency,   reorganization,   moratorium   or  similar  laws
                  affecting  the  enforcement  of  creditors'  rights  and  (ii)
                  equitable principles of general applicability;

         (c)      such Party is a corporation  duly organized,  validly existing
                  and in good  standing  under  the  laws of the  state or other
                  jurisdiction  of  incorporation  or  formation  and  has  full
                  corporate power and authority to enter into this Agreement and
                  to carry out the provisions  hereof except where failure to be
                  in good  standing  would not  materially  impact  the  Party's
                  ability to meet its obligations hereunder;

         (d)      such  Party is duly  authorized,  by all  requisite  corporate
                  action,   to  execute  and  deliver  this  Agreement  and  the
                  execution,  delivery and performance of this Agreement by such
                  Party does not require any shareholder action or approval, and
                  the Person executing this Agreement on behalf of such Party is
                  duly authorized to so by all requisite corporate action; and

         (e)      no  consent,   approval,   order  or   authorization   of,  or
                  registration,   qualification,   designation,  declaration  or
                  filing  with,  any  federal,   state  or  local   governmental
                  authority is required on the part of such Party in  connection
                  with the valid  execution,  delivery and  performance  of this
                  Agreement,   except  for  any  filings  under  any  applicable
                  securities  laws and except where the failure to obtain any of
                  the foregoing would not have a material  adverse impact on the
                  ability of such Party to meets its obligations hereunder.

2.2      Additional  Neurocrine   Representations,   Warranties  and  Covenants.
         Neurocrine represents, warrants and covenants to Wyeth-Ayerst that:

         (a)      it has the full right, power and authority to grant the 
                  licenses granted to Wyeth-Ayerst under Article Three hereof;

         (b)      all Patent Rights included  within the Neurocrine  Transporter
                  Technology   and/or  the  Neurocrine   Ancillary   Transporter
                  Technology  which are  existing as of the  Effective  Date are
                  listed on Exhibit C attached  hereto and, as of the  Effective
                  Date,  the  Patent  Rights   included  within  the  Neurocrine
                  Technology are existing and, to its knowledge, are not invalid
                  or unenforceable, in whole or in part;

         (c)      except as disclosed to  Wyeth-Ayerst in writing and except for
                  the nonexclusive  licenses  granted to Neurocrine  pursuant to
                  Article  Three  of the OHSU  Agreement  or  retained  by OHSU,
                  Howard  Hughes   Medical   Institute  and  the  United  States
                  Government  pursuant  to  Article  Five  of the  OHSU  License
                  Agreement,  to its  knowledge (i) it is the sole and exclusive
                  owner or the exclusive licensee of the Neurocrine  Technology,
                  including,  without  limitation,  all Patent  Rights  included
                  therein,  and (ii) no Person  (except OHSU,  the Howard Hughes
                  Medical  Institute  and  the  United  States  Government  with
                  respect to those Patent Rights  licensed to  Neurocrine  under
                  the OHSU Agreement), has any right, title or interest in or to
                  the Neurocrine Technology;

         (d)      except  as  disclosed  to  Wyeth-Ayerst  in  writing,  to  its
                  knowledge (i) all inventors (who are known as of the date this
                  Agreement is signed by each of the Parties) of any  inventions
                  included within the Neurocrine  Technology have assigned their
                  entire right, title and interest in and to such inventions and
                  the corresponding  Patent Rights to Neurocrine or, in the case
                  of  inventions  and Patent  Rights  licensed by Oregon  Health
                  Sciences  University to Neurocrine,  to Oregon Health Sciences
                  University, and (ii) no Person, other than those Persons named
                  as  inventors  on any  patent or patent  application  included
                  within  the  Neurocrine  Technology,  is an  inventor  of  the
                  invention(s) claimed in such patent or patent application;

         (e)      except  as   disclosed   to   Wyeth-Ayerst   in  writing,   to
                  Neurocrine's knowledge,  OHSU has (i) complied with all of its
                  obligations under applicable United States Government laws and
                  regulations with respect to any inventions included within the
                  Neurocrine  Technology which inventions are subject inventions
                  of a funding  agreement  between  OHSU and the  United  States
                  Government  or any agency  thereof and (ii)  elected to retain
                  title to any such invention as provided in 37 CFR Part 401;

         (f)      as of the  date  this  Agreement  is  signed  by  each  of the
                  Parties, there are no claims, judgments or settlements against
                  or  owed  by  Neurocrine  or,  to its  knowledge,  pending  or
                  threatened  claims or  litigation  relating to the  Neurocrine
                  Technology  and during the term of this  Agreement  Neurocrine
                  shall promptly notify  Wyeth-Ayerst in writing,  upon learning
                  of  any  such  actual  or   threatened   claim,   judgment  or
                  settlement;

         (g)      during  the  term  of  this  Agreement   Neurocrine  will  use
                  Commercially  Reasonable  Efforts not to  diminish  the rights
                  under  the  Neurocrine  Technology  provided,   however,  that
                  termination of the OHSU Agreement (i) by reason of the failure
                  by  Wyeth-Ayerst,   as  a  sublicensee  thereunder,   to  meet
                  obligations  set forth in Articles Nine and Ten thereof or any
                  other  obligations  of a  sublicensee  thereunder  or  (ii) by
                  reason of any default by Wyeth-Ayerst hereunder, shall not, in
                  either instance, constitute a breach of this subparagraph (g);

         (h)      except  as  set  forth  on  Exhibit  E,  as of the  date  this
                  Agreement is signed by each of the Parties, it is not aware of
                  any patent,  patent application or other intellectual property
                  right of any Third  Party  which  could  materially  adversely
                  affect the ability of either Party to carry out its respective
                  obligations  hereunder  or  the  ability  of  Wyeth-Ayerst  to
                  exercise or exploit  any of the rights or licenses  granted to
                  it under this Agreement;

         (i)      except  as set forth on  Exhibit  F hereof,  the terms of this
                  Agreement  do not  conflict in any  material  respect with the
                  terms of any other Neurocrine obligations; and

         (j)      it has no knowledge of any  material  information,  other than
                  information  provided to  Wyeth-Ayerst in writing prior to the
                  signing of this Agreement,  which would negatively  affect the
                  ability of Wyeth-Ayerst to use the Neurocrine  Transporters or
                  the Neurocrine Ancillary Transporters.

2.3      Representation  by Legal Counsel.  Each Party hereto represents that it
         has been represented by legal counsel in connection with this Agreement
         and acknowledges  that it has  participated in the drafting hereof.  In
         interpreting  and applying the terms and provisions of this  Agreement,
         the Parties agree that no presumption shall exist or be implied against
         the Party which drafted such terms and provisions.

2.4      Neurocrine Disclaimer. EXCEPT AS EXPRESSLY PROVIDED IN SECTIONS 2.1 AND
         2.2  HEREOF,  NEUROCRINE  MAKES NO OTHER  REPRESENTATION  OR  WARRANTY,
         EITHER  EXPRESS  OR  IMPLIED,   INCLUDING,   WITHOUT  LIMITATION,   ANY
         WARRANTIES OF  MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH
         RESPECT TO ANY NEUROCRINE MATERIALS,  INCLUDING WITHOUT LIMITATION, THE
         NEUROCRINE   TRANSPORTERS   AND  NEUROCRINE   ANCILLARY   TRANSPORTERS.
         ADDITIONALLY,  NEUROCRINE MAKES NO REPRESENTATION  OR WARRANTY,  EITHER
         EXPRESS  OR  IMPLIED,  THAT  THE  MANUFACTURE,  USE OR SALE OF ANY LEAD
         COMPOUND OR  COLLABORATION  PRODUCT WILL NOT INFRINGE THE  INTELLECTUAL
         PROPERTY RIGHTS OF ANY THIRD PARTY.

2.5      Wyeth-Ayerst  Disclaimer.  EXCEPT AS EXPRESSLY  PROVIDED IN SECTION 2.1
         HEREOF,  WYETH-AYERST MAKES NO OTHER REPRESENTATION OR WARRANTY, EITHER
         EXPRESS OR IMPLIED,  INCLUDING,  WITHOUT LIMITATION,  ANY WARRANTIES OF
         MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO ANY
         WYETH-AYERST MATERIALS, ANY LEAD COMPOUND OR ANY COLLABORATION PRODUCT.
         ADDITIONALLY,  WYETH-AYERST MAKES NO REPRESENTATION OR WARRANTY, EITHER
         EXPRESS OR IMPLIED THAT THE DISCOVERY, DEVELOPMENT, MANUFACTURE, USE OR
         SALE OF ANY LEAD  COMPOUND OR  COLLABORATION  PRODUCT WILL NOT INFRINGE
         THE INTELLECTUAL PROPERTY RIGHTS OF ANY THIRD PARTY.


                                  ARTICLE THREE
                                    LICENSES

3.1      License Grant to Wyeth-Ayerst.  Except as set forth in Section 3.3 
         below, Neurocrine hereby grants to Wyeth-Ayerst:

         (a)      the sole and exclusive  worldwide  right and license,  with no
                  right to sublicense  (except (i) to Wyeth-Ayerst's  Affiliates
                  and  (ii)  to  any  sublicensee  of  a  Lead  Compound  and/or
                  Collaboration  Product in so far as  reasonably  necessary for
                  such   sublicensee  to  develop  such  Lead  Compound   and/or
                  Collaboration  Product),  under both the Neurocrine Technology
                  and Neurocrine's interest in any Joint Technology,  to use the
                  Neurocrine   Transporters   for  the   identification   and/or
                  development  of Lead Compounds and  Collaboration  Products in
                  the Field of Use;

         (b)      the sole and exclusive  worldwide right and license,  with the
                  right to sublicense to Affiliates of  Wyeth-Ayerst  and/or one
                  or more Third Parties,  under both the  Neurocrine  Technology
                  and Neurocrine's  interest in any Joint  Technology,  to make,
                  have made, use, import,  market,  offer for sale and sell Lead
                  Compounds and Collaboration Products in the Field of Use;

         (c)      during  the  term  of  the  Research  Program,  the  sole  and
                  exclusive  right  and  license,  with no right  to  sublicense
                  (except  to   Wyeth-Ayerst's   Affiliates),   under  both  the
                  Neurocrine Ancillary  Transporter  Technology and Neurocrine's
                  interest  in  any  Joint  Technology,  to use  the  Neurocrine
                  Ancillary  Transporters  for the [***] of Lead  Compounds  and
                  Collaboration Products;

         (d)      after the term of the Research Program, a non-exclusive  right
                  and  license,   with  no  right  to   sublicense   (except  to
                  Wyeth-Ayerst's  Affiliates),  under the  Neurocrine  Ancillary
                  Transporter   Technology  to  use  the  Neurocrine   Ancillary
                  Transporters for the [***] of Lead Compounds and Collaboration
                  Products;

         (e)      during the term of this  Agreement,  a nonexclusive  right and
                  license,   with  no  right  to   sublicense   (except  (i)  to
                  Wyeth-Ayerst  Affiliates and (ii) to any sublicensee of a Lead
                  Compound and/or Collaboration  Product in so far as reasonably
                  necessary for such  sublicensee  to develop such Lead Compound
                  and/or Collaboration Product), to use all data and information
                  generated by or on behalf of  Neurocrine in the conduct of the
                  Research  Program,  including  data  relating  to  Hits in the
                  Neurocrine  Proprietary Chemical Library, but only as shall be
                  reasonably  necessary for  Wyeth-Ayerst to conduct research to
                  identify  and  develop  Lead   Compounds   and   Collaboration
                  Products,  provided,  however,  that such license shall become
                  sole  and  exclusive  when a  Compound  is  designated  a Lead
                  Compound in accordance  with Article Six and shall revert to a
                  non-exclusive  license  upon  determination  of  the  Steering
                  Committee or  Wyeth-Ayerst  that such Lead  Compound  will not
                  become a Collaboration Product;

         (f)      during  the term of this  Agreement,  an  exclusive  right and
                  license,  with the  right to  sublicense,  to use all data and
                  information  generated  by or on behalf of  Neurocrine  in the
                  conduct of the  Research  Program  relating to Lead  Compounds
                  and/or  Collaboration  Products in the Neurocrine  Proprietary
                  Chemical  Library,  but only as shall be reasonably  necessary
                  for  Wyeth-Ayerst to conduct  research to identify and develop
                  Lead Compounds and Collaboration Products; and

         (g)      during the term of this Agreement,  a non-exclusive  right and
                  license,   with  no  right  to   sublicense   (except  (i)  to
                  Wyeth-Ayerst's  Affiliates  and (ii) to any  sublicensee  of a
                  Lead  Compound  and/or  Collaboration  Product  in so  far  as
                  reasonably necessary for such sublicensee to develop such Lead
                  Compound and/or Collaboration  Product), to use the Neurocrine
                  Materials  but only to the extent  that such right and license
                  shall be necessary  for  Wyeth-Ayerst  to identify and develop
                  Lead Compounds and Collaboration Products.

3.2      License Grant to Neurocrine.  Wyeth-Ayerst  hereby grants to Neurocrine
         for the term of the  Research  Program  (i) a  non-exclusive  right and
         license, with no right to sublicense, under the Wyeth-Ayerst Technology
         to the  extent  that such  right and  license  shall be  necessary  for
         Neurocrine to perform its obligations under the Research  Program,  and
         (ii) a non-exclusive right and license, with no right to sublicense, to
         use the  Wyeth-Ayerst  Materials but only to the extent that such right
         and  license  shall  be  necessary   for   Neurocrine  to  perform  its
         obligations  under the Research Program and (iii) a nonexclusive  right
         and license to use all data and information generated in the conduct of
         the  Research   Program,   including  data  relating  to  Hits  in  the
         Wyeth-Ayerst  Proprietary  Chemical  Library,  but  only  as  shall  be
         reasonably  necessary for Neurocrine to perform its  obligations  under
         the Research Program.

3.3      Neurocrine   Retained  Rights.   The  exclusive   licenses  granted  to
         Wyeth-Ayerst in Section 3.1 above, shall be subject to the retention by
         Neurocrine  of a  nonexclusive  right  and  license,  with no  right to
         sublicense,  in each case, to the extent  necessary  for  Neurocrine to
         perform its obligations under the Research Program  hereunder.  Subject
         to the licenses  granted to Wyeth-Ayerst in Section 3.1 above,  nothing
         herein  shall be deemed to  restrict  Neurocrine's  right to  otherwise
         exploit the Neurocrine  Technology to develop  products other than Lead
         Compounds and Collaboration  Products  including,  without  limitation,
         Neurocrine's  right  to use and  sublicense  the use of the  Neurocrine
         Transporters  to conduct  selectivity  testing with respect to products
         (other than Lead Compounds and Collaboration  Products) being developed
         by Neurocrine or is corporate partners or sublicensees.

3.4      Prior Agreement.  This Agreement supersedes the Prior Agreement and all
         Compounds which may have been identified under the Prior Agreement will
         be governed solely by the terms and conditions of this Agreement.

3.5      OHSU Agreement.  Patent Rights  licensed to Neurocrine  pursuant to the
         OHSU  Agreement  (the   "Sublicensed   Rights")  are  included  in  the
         Neurocrine Technology licensed to Wyeth-Ayerst hereunder.  Wyeth-Ayerst
         has approved the terms of the OHSU Agreement and the Parties agree that
         the terms of the OHSU Agreement are  consistent  with the terms of this
         Agreement   and  no  conflict   exist  with  respect  to   Neurocrine's
         obligations under this Agreement and Neurocrine's obligations under the
         OHSU Agreement.  Wyeth-Ayerst  will have all of the rights set forth in
         that  agreement  to be  afforded  to  Neurocrine's  sublicensee  of any
         technology licensed thereunder  including,  without limitation,  in the
         event of a termination of the OHSU  Agreement,  the right under Section
         4.03 thereof, to enter into a license,  with respect to the Sublicensed
         Rights, directly with OHSU which license would be on the same terms and
         conditions as the OHSU Agreement. In the event that Wyeth-Ayerst enters
         into such a  license  with  OHSU,  (i)  [***] of any  payments  made by
         Wyeth-Ayerst to OHSU under Paragraph 6.02 thereof  (including  payments
         creditable  against  payments owed under Section 6.02 thereof) and (ii)
         [***] of other payments  thereunder shall in each case be deducted from
         any payments that Wyeth-Ayerst  remains obligated or thereafter becomes
         obligated to make to Neurocrine under this Agreement. Neurocrine agrees
         that it will not  modify or amend the OHSU  Agreement,  insofar  as any
         such  amendment  or  modification  will  have any  impact on any of the
         rights or  obligations  of  Wyeth-Ayerst  under this  Agreement  or any
         agreement entered into between Wyeth-Ayerst and OHSU in accordance with
         this Section 3.5,  without  Wyeth-Ayerst's  prior written consent which
         consent  (i)  may  be  provided   or   withheld  by   Wyeth-Ayerst   in
         Wyeth-Ayerst's  sole  discretion in the case of any  modification  that
         would negatively impact any such rights or obligations of Wyeth-Ayerst,
         including,  without limitation,  any increase in payments to be made by
         Wyeth-Ayerst,   any   increase  in   diligence   obligations,   or  any
         modification of the exclusivity of the Sublicensed Rights, or (ii) will
         not  be  unreasonably  withheld  by  Wyeth-Ayerst  in the  case  of any
         modification  that  would  not  negatively  impact  any such  rights or
         obligations  of  Wyeth-Ayerst.  Neurocrine  further agrees that it will
         promptly  provide  Wyeth-Ayerst  with copies of any notices it receives
         from or gives  to OHSU  pertaining  to any  termination  or  threatened
         termination of the OHSU Agreement.


                                  ARTICLE FOUR
                               STEERING COMMITTEE

4.1      Creation;   Authority.   Immediately  following  the  signing  of  this
         Agreement,  Wyeth-Ayerst  and  Neurocrine  will  establish  a  steering
         committee (the "Steering  Committee")  consisting of at least three (3)
         members from each of Wyeth-Ayerst and Neurocrine with  Wyeth-Ayerst and
         Neurocrine  having  equal  representation  at all times.  The  Steering
         Committee  will  be  responsible   for  monitoring  and  reviewing  the
         implementation  of the Research Plan by the Parties and for determining
         the mechanisms for exchange of  information  and materials  between the
         Parties.  From  time to time,  the  Steering  Committee  may  establish
         subcommittees  to oversee  specific  projects  or  activities  and such
         subcommittees  shall be  constituted  as the Steering  Committee  shall
         determine.  The Steering  Committee will exist until the termination of
         the Research Program unless the Parties otherwise agree in writing.

4.2      Chairperson.  The  chairperson  of  the  Steering  Committee  shall  be
         designated by  Wyeth-Ayerst.  The  chairperson  will be responsible for
         scheduling  meetings of the Steering  Committee,  preparing agendas for
         meetings,  sending to all  Steering  Committee  members  notices of all
         regular meetings and agendas for such meetings.  The chairperson  shall
         appoint a secretary for each meeting who will record the minutes of the
         meeting,  circulate  copies of meeting  minutes to the Parties and each
         Steering  Committee  member promptly  following the meeting for review,
         comment and approval and finalize approved meeting minutes.

4.3      Meetings. The Steering Committee shall meet at least once each calendar
         quarter and may meet at  additional  times as the Parties  shall agree.
         Either Party may call a special  meeting of the Steering  Committee two
         (2) times per year,  on  fifteen(15)  days written  notice to the other
         Party.  The Party  convening a special  meeting  shall send notices and
         agenda  for such  meetings  to the  other  Party  and to each  Steering
         Committee  member.  Meetings will alternate  between the offices of the
         Parties,  unless otherwise agreed, or may be held  telephonically or by
         video-conference.  Members  of the  Committee  shall  have the right to
         participate  in and  vote  at  meetings  by  telephone  and to  vote at
         meetings  by  proxy.  Each  Party  shall be  responsible  for  expenses
         incurred by its  employees  and its members of the  Steering  Committee
         incurred in attending or otherwise  participating in Steering Committee
         meetings.

4.4      Decisions  of the  Committee.  The goal of the  Parties'  collaboration
         shall be the timely  identification  and  development of Lead Compounds
         and Collaboration  Products for  commercialization in the Field of Use.
         All decisions of the Steering Committee shall be made by majority vote,
         with at least one (1) member from each Party voting with the  majority,
         in the exercise of good faith to further the goal of the Collaboration.
         In  the  event  that a  decision  cannot  be  reached  by the  Steering
         Committee,   the  matter  shall  be  referred  to  further  review  and
         resolution by the Chief  Executive  Officer of Neurocrine and President
         of Wyeth-Ayerst Research as set forth in Section 14.1.


                                  ARTICLE FIVE
               COLLABORATIVE RESEARCH PROGRAM AND RESEARCH FUNDING

5.1      Research  Program.  Under the terms and  conditions  set forth  herein,
         Wyeth-Ayerst and Neurocrine will exclusively collaborate in the conduct
         of  a  collaborative   pre-clinical  research  program  (the  "Research
         Program")  to  discover,   identify  and  develop   modulators  of  the
         Neurocrine  Transporters  for the treatment of central  nervous  system
         disorders, [***]. The Research Program will be focused on the screening
         of  the  Wyeth-Ayerst   Proprietary  Chemical  Library  and  Neurocrine
         Proprietary  Chemical  Library and any other library selected by mutual
         agreement  of the Parties for the  identification  of Hits, a medicinal
         chemistry  program for the  development  of Lead  Compound  candidates,
         screening  and testing of Lead  Compound  candidates  to identify  Lead
         Compounds  and  further  preclinical  research  and  screening  of Lead
         Compounds  to  select   Collaboration   Products  for  development  and
         commercialization by Wyeth-Ayerst.

5.2      Term. The initial term of the Research  Program will be three (3) years
         unless earlier terminated in accordance with Article Twelve hereof. The
         initial  term of the  Research  Program  will begin on January 1, 1999.
         Upon the expiration of the initial three (3) year term, the term of the
         Research Program may, upon mutual written agreement of the Parties,  be
         extended for [***] extension terms on  substantially  the same terms as
         those set forth herein.  Notwithstanding  the  foregoing,  in the event
         that at the end of the initial term of the Research Program,  [***] and
         the Steering  Committee or Wyeth-Ayerst has determined that significant
         additional  [***]  should  be  conducted  and  the  Steering  Committee
         determines that such additional [***] justifies  extending the Research
         Program by an additional [***], the Parties will extend the term of the
         Research  Program  [***],  provided,  however,  that in no  event  will
         Wyeth-Ayerst be obligated to fund more than [***] Neurocrine Researcher
         FTEs (at a rate of [***]) during [***].

5.3      Research  Plan.  Within  thirty  (30)  days  following  the  date  this
         Agreement is signed by each of the Parties and on an annual basis on or
         before October 31 of each year thereafter, the Steering Committee shall
         develop and approve,  a research plan and budget for the  collaborative
         Research  Program (the  "Research  Plan").  The  Research  Plan will be
         updated on an annual basis and shall specifically include both detailed
         plans for the following year including staffing levels,  activities and
         estimated  expenditures as well as more general plans for the remaining
         term of the Research Program. The Research Plan may only be modified or
         amended upon the written approval of the Steering Committee.  Except as
         expressly  set  forth  in  Section  5.5  below,  each  Party  shall  be
         responsible for its own costs and expenses incurred in their conduct of
         the Research Program.

5.4      Conduct of the Research Program. Neurocrine and Wyeth-Ayerst shall each
         use Commercially  Reasonable  Efforts to perform its obligations  under
         the  Research   Program  in   accordance   with  the   Research   Plan.
         Notwithstanding,  the  foregoing,  during  the  term  of  the  Research
         Program, Neurocrine shall apply an average of at least [***] Neurocrine
         Researcher  FTEs per  year in  performing  its  obligations  under  the
         Research  Program,  which minimum number of Neurocrine  Researcher FTEs
         shall be increased to [***] upon the successful completion of the first
         [***]  (according  to the  criteria  set forth in Exhibit B, Part 2(a))
         [***] Lead  Compound  (as defined in Exhibit B attached  hereto) and to
         [***] upon the successful  completion of the first [***]  (according to
         the criteria set forth in Exhibit B, Part 2(b)) of [***] Lead Compound,
         provided,  however,  that neither increase shall become effective prior
         to the  beginning  of the [***] of the  Research  Program.  While it is
         anticipated  that Neurocrine and  Wyeth-Ayerst  will each devote to the
         Research  Program  efforts  consistent  with the goals set forth in the
         Research Plan, in no event will  Neurocrine's  failure to devote to the
         Research  Program more than the number of  Neurocrine  Researcher  FTEs
         funded by Wyeth-Ayerst pursuant to Section 5.5 below, in and of itself,
         constitute  a failure  by  Neurocrine  to use  Commercially  Reasonable
         Efforts to conduct the Research Program. In addition,  the Parties have
         agreed that the Research Plan will at all times  allocate to Neurocrine
         sufficient  responsibilities  to  allow  Neurocrine  to  devote  to the
         Research  Program,  the number of Neurocrine  Researcher FTEs funded by
         Wyeth-Ayerst hereunder.

5.5      Funding of the Research Program.

         (a)      Funding  by  Wyeth-Ayerst.  During  the  initial  term  of the
                  Research Program,  Wyeth-Ayerst will provide to Neurocrine the
                  funds in the amount of [***] per calendar quarter, which funds
                  are to be used by Neurocrine solely to fund the conduct of the
                  Research  Program by [***]  Neurocrine  Researcher  FTEs.  The
                  funding  amount set forth in the preceding  sentence  shall be
                  increased  to [***] per calendar  quarter upon the  successful
                  completion  of the first [***]  (according to the criteria set
                  forth in Exhibit B, Part 2(a)) [***] Lead Compound which funds
                  are to be used by Neurocrine solely to fund the conduct of the
                  Research  Program by [***]  Neurocrine  Researcher FTEs and to
                  [***] per calendar  quarter upon the successful  completion of
                  the [***]  (according  to the criteria set forth in Exhibit B,
                  Part 2(b)) of [***] Lead Compound  [***] which funds are to be
                  used by Neurocrine  solely to fund the conduct of the Research
                  Program  by  [***]  Neurocrine   Researcher  FTEs,   provided,
                  however,  that (i) neither  increase  shall  become  effective
                  prior to [***] of the  Research  Program  and (ii)  subject to
                  clause (i) above, each such increase shall become effective on
                  the first day of the calendar  quarter  following the calendar
                  quarter in which the event resulting in such increase  occurs.
                  Wyeth-Ayerst  will  provide  the  funding  set  forth  in this
                  Section  5.5(a) to  Neurocrine  [***]  during  the term of the
                  Research  Program,  provided  however,  that the first payment
                  will be due on  [***]  business  day  following  the  date the
                  Parties shall have both signed this Agreement.

         (b)      Reporting  and  Reconciliation.  Within thirty (30) days after
                  the  end of  each  calendar  quarter  during  the  term of the
                  Research  Program,  Neurocrine  will provide to Wyeth-Ayerst a
                  report setting forth the number of Neurocrine  Researcher FTEs
                  devoted to the Research Program in such calendar quarter along
                  with their  names and  titles.  In the event  that  Neurocrine
                  shall, in any calendar  quarter,  devote to the conduct of the
                  Research   Program   fewer  than  the  number  of   Neurocrine
                  Researcher FTEs funded by  Wyeth-Ayerst  for the such calendar
                  quarter as required under Section 5.4 hereof, Neurocrine shall
                  in  good  faith  endeavor  to  devote,  at  its  own  expense,
                  additional  Neurocrine  Researcher  FTEs to the conduct of the
                  Research  Program in subsequent  calendar  quarters to make up
                  for the shortfall. If, despite Neurocrine's good faith efforts
                  to make up any  shortfall in number of  Neurocrine  Researcher
                  FTEs devoted to the Research  Program versus the funded number
                  of Neurocrine  Researcher FTEs set forth in Section 5.5, it is
                  determined at the end of the term of the Research Program that
                  Neurocrine  has,  over  the  life  of  the  Research  Program,
                  utilized  less than the number of Neurocrine  Researcher  FTEs
                  funded by  Wyeth-Ayerst  hereunder,  Neurocrine  shall  within
                  thirty   (30)  days   after  such   determination   refund  to
                  Wyeth-Ayerst  the excess Research  Program funding provided to
                  Neurocrine  under Section 5.5(a) above,  which refund shall be
                  equal to [***]  multiplied by the  difference  between (x) the
                  number (in the aggregate) of Neurocrine  Researcher  FTEs that
                  were  funded  by  Wyeth-Ayerst   [***]  Research   Program  in
                  accordance  with  Section  5.5 and (y) the  actual  number  of
                  Neurocrine  Researcher  FTEs,  in  the  aggregate,  that  were
                  devoted to the Research  Program [***] Research  Program.  For
                  example, if the number of Neurocrine Researcher FTEs funded by
                  Wyeth-Ayerst  [***] of the  Research  Program  was  [***]  and
                  Neurocrine, in fact, only utilized [***] Neurocrine Researcher
                  FTEs [***] of the Research  Program,  Neurocrine  would refund
                  [***] to Wyeth-Ayerst.

         (c)      Records and Audits.  During the term of the  Research  Program
                  and for a period  of three (3)  years  thereafter,  Neurocrine
                  shall keep and maintain  accurate and complete records showing
                  the time devoted and activities  performed by each  Neurocrine
                  Researcher in performing  Neurocrine's  obligations  under the
                  Research Program in sufficient  detail such that the number of
                  Neurocrine  Researcher  FTEs applied to the  Research  Program
                  during  each  calendar   quarter  thereof  can  be  accurately
                  determined.  Upon fifteen (15) days prior written  notice from
                  Wyeth-Ayerst, Neurocrine shall permit an independent certified
                  public  accounting  firm  of  nationally  recognized  standing
                  selected  by   Wyeth-Ayerst   and  reasonably   acceptable  to
                  Neurocrine,  to  examine  the  relevant  books and  records of
                  Neurocrine and its  Affiliates as may be reasonably  necessary
                  to  verify  the   accuracy   of  the  reports   submitted   to
                  Wyeth-Ayerst  under  Section  5.5(b)  hereof and the number of
                  Neurocrine  Researcher  FTEs  applied  to the  performance  of
                  Neurocrine's   obligations  under  the  Research  Program.  An
                  examination  under this  Section  5.5(c)  shall not occur more
                  than once in any calendar year and no such  examination may be
                  conducted  more than eighteen (18) months after the expiration
                  or earlier termination of the Research Program. The accounting
                  firm shall provide both Neurocrine and  Wyeth-Ayerst a written
                  report disclosing  whether the reports submitted by Neurocrine
                  are correct or incorrect and the specific  details  concerning
                  any  discrepancies.  No other information shall be provided to
                  Wyeth-Ayerst.

5.6      Invention Assignment  Agreements.  Each Neurocrine  Researcher and each
         scientist of  Wyeth-Ayerst  conducting  the Research  Program will have
         executed  Neurocrine's or Wyeth-Ayerst's,  as the case may be, standard
         non-disclosure and invention assignment agreement.

5.7      Reporting and Disclosure.

         (a)      Reports.  Prior  to each  quarterly  meeting  of the  Steering
                  Committee,  Neurocrine and Wyeth-Ayerst  will each provide the
                  other with  written  copies of all  materials  they  intend to
                  present at the Steering  Committee meeting plus, to the extent
                  not set forth in the Steering Committee  materials,  a written
                  report  summarizing  any other  material data and  information
                  arising out of the  conduct of the  Research  Program.  In the
                  event that  after  receipt of any such  report,  either  Party
                  shall  request  additional  data or  information  relating  to
                  Research  Program data or  Collaboration  Technology  licensed
                  hereunder,  the  Party  to whom  such  request  is made  shall
                  promptly  provide to the other Party such data or  information
                  that such  Party  reasonably  believes  is  necessary  for the
                  continued conduct of the Research Program.

         (b)      Quarterly Meetings.  At the quarterly meetings of the Steering
                  Committee,   Wyeth-Ayerst   and  Neurocrine   will  review  in
                  reasonable  detail (i) all data and  information  generated in
                  the conduct of the  Research  Program by each Party,  and (ii)
                  all Collaboration  Technology  licensed hereunder developed by
                  the Parties.

         (c)      Disclosure.  During  the  term of the  Research  Program,  the
                  Parties  will  promptly  disclose  to one  another  all  data,
                  information,  inventions,  techniques and discoveries (whether
                  patentable  or not) arising out of the conduct of the Research
                  Program  and  all   inventions,   techniques  and  discoveries
                  (whether   patentable  or  not)   included  in   Collaboration
                  Technology licensed hereunder.

5.8      Data.

         (a)      Neurocrine  Data. All data and information  arising out of the
                  Research Program which relates  specifically to Compounds from
                  the Neurocrine  Proprietary  Chemical Library will be owned by
                  Neurocrine,  will be Neurocrine Confidential  Information and,
                  subject to the licenses  granted to  Wyeth-Ayerst,  if any, as
                  set forth herein, may be used by Neurocrine for any purpose.

         (b)      Wyeth-Ayerst Data. All data and information arising out of the
                  Research Program which relates  specifically to Compounds from
                  the Wyeth-Ayerst Proprietary Chemical Library will be owned by
                  Wyeth-Ayerst,  will be Wyeth-Ayerst  Confidential  Information
                  and, subject to the licenses granted to Neurocrine, if any, as
                  set forth herein, may be used by Wyeth-Ayerst for any purpose.

         (c)      Other Research Program Data. All data and information  arising
                  out of the Research  Program which is not  Neurocrine  Data or
                  Wyeth-Ayerst  Data as set forth in (a) and (b) above,  will be
                  jointly  owned by the Parties  and will be Joint  Confidential
                  Information  and,  subject  to the  licenses  granted or to be
                  granted  by one  Party  to the  other,  if any,  as set  forth
                  herein, may be used by the Parties for any purpose.
         (d)      Wyeth-Ayerst     Research,     Clinical     Development    and
                  Commercialization  Data. All data and information  arising out
                  of Wyeth-Ayerst's research and preclinical development of Lead
                  Compounds and/or Collaboration  Products after the term of the
                  Research  Program and all data and information  arising out of
                  the   clinical    development   and    commercialization    of
                  Collaboration   Products  by   Wyeth-Ayerst   will  belong  to
                  Wyeth-Ayerst   and   shall   be   Wyeth-Ayerst    Confidential
                  Information.

5.9      Materials.

         (a)      Research Program Materials. During the term of this Agreement,
                  upon request by either Party, the Party to whom the request is
                  made will promptly  provide to the other Party such quantities
                  of Research Program Materials as shall be reasonably available
                  in excess of its own needs for such  other  Party to carry out
                  its respective responsibilities under this Agreement.  Subject
                  to the licenses set forth in Article Three, each Party may use
                  the Research  Program  Materials  created or developed by such
                  Party for any purpose.

         (b)      Neurocrine  Materials.  During  the  term of  this  Agreement,
                  Neurocrine  will supply to Wyeth-Ayerst  Neurocrine  Materials
                  reasonably  (both  in  quantity  and  identity)  requested  by
                  Wyeth-Ayerst   provided  (i)  such  Neurocrine  Materials  are
                  reasonably  and readily  available to  Neurocrine in excess of
                  Neurocrine's  own  requirements,   and  (ii)  supply  of  such
                  Neurocrine  Materials will not, in Neurocrine's sole judgment,
                  (A)  conflict  with  Neurocrine's  internal  or  collaborative
                  research  programs,  (B) conflict with  Neurocrine's  internal
                  policies regarding such materials or (C) violate any agreement
                  to which  Neurocrine  is a  party.  Any  Neurocrine  Materials
                  provided to  Wyeth-Ayerst  hereunder  together with  materials
                  derived therefrom thereof (i) may only be used by Wyeth-Ayerst
                  and  Wyeth-Ayerst's  permitted  sublicensees in the conduct of
                  the  Research   Program   and/or  in  the   discovery   and/or
                  development of Lead Compounds and/or  Collaboration  Products,
                  (ii) may not be  supplied to Third  Parties,  other than Third
                  Parties that, with the approval of the Steering Committee, are
                  under contract with one of the Parties to perform  services in
                  support of the Research Program,  without  Neurocrine's  prior
                  written  consent  which  can be  withheld  for any  reason  in
                  Neurocrine's  sole  discretion and (iii) will, at Neurocrine's
                  option and at  Neurocrine's  request be returned to Neurocrine
                  or destroyed.  The provision of Neurocrine Materials hereunder
                  will not  constitute  any grant,  option or license  under any
                  Neurocrine  Patent  Rights,  except  as  expressly  set  forth
                  herein.

         (c)      Wyeth-Ayerst  Materials.  During  the  term  of  the  Research
                  Program,  Wyeth-Ayerst will supply to Neurocrine  Wyeth-Ayerst
                  Materials reasonably (both in quantity and identity) requested
                  by Neurocrine,  provided that (i) such Wyeth-Ayerst  Materials
                  are   reasonably   and   readily   available   in   excess  of
                  Wyeth-Ayerst's   own  requirement  and  (ii)  supply  of  such
                  Wyeth-Ayerst owned Materials will not, in Wyeth-Ayerst's  sole
                  judgment,   (A)  conflict  with  Wyeth-Ayerst's   internal  or
                  collaborative    research   programs,    (B)   conflict   with
                  Wyeth-Ayerst's  internal policies  regarding such materials or
                  (C) violate any  agreement to which  Wyeth-Ayerst  is a party.
                  Any Wyeth-Ayerst  Materials  provided to Neurocrine  hereunder
                  together with any materials  derived therefrom (i) may only be
                  used by  Neurocrine  in the conduct of the  Research  Program,
                  (ii)   may  not  be   supplied   to  Third   Parties   without
                  Wyeth-Ayerst's prior written consent which can be withheld for
                  any reason in  Wyeth-Ayerst's  sole discretion and (iii) will,
                  at  Wyeth-Ayerst's  option and at Wyeth-Ayerst's  request,  be
                  returned  to  Wyeth-Ayerst  or  destroyed.  The  provision  of
                  Wyeth-Ayerst  Materials  hereunder  will  not  constitute  any
                  grant, option or license under any Wyeth-Ayerst Patent Rights,
                  except as expressly set forth herein.


                                   ARTICLE SIX
                           SELECTION OF LEAD COMPOUNDS
                           AND COLLABORATION PRODUCTS

6.1      Selection  of Lead  Compounds  During  Term of Research  Program.  Lead
         Compounds may be selected by the Steering  Committee during the term of
         the Research Program from Hits in the Neurocrine  Proprietary  Chemical
         Library, Wyeth-Ayerst Proprietary Chemical Library or any other library
         the  Parties  shall  agree to screen in  connection  with the  Research
         Program.  Additionally,  if any Compound in the Neurocrine  Proprietary
         Chemical Library is identified as a Hit during the term of the Research
         Program,  Wyeth-Ayerst  may, upon written notice to Neurocrine,  select
         such Compound as a Lead Compound at any time during [***].

6.2      Selection  of Lead  Compounds  After  Term of  Research  Program.  Lead
         Compounds  may be  selected  by  Wyeth-Ayerst  after  the  term  of the
         Research  Program  from  Compounds  in  the  Wyeth-Ayerst   Proprietary
         Chemical  Library  or any other  library  Wyeth-Ayerst  shall  elect to
         screen  in  connection  with  the  development  of Lead  Compounds  and
         Collaboration    Products   using   the    Collaboration    Technology.
         Notwithstanding the foregoing,  except as expressly provided in Section
         6.1 above, in no event will  Wyeth-Ayerst be entitled after the term of
         the  Research  Program  to  select  Compounds  from  Compounds  in  the
         Neurocrine   Proprietary   Chemical   Library  as  Lead   Compounds  or
         Collaboration Products.

6.3      Selection  of  Collaboration   Products.  Lead  Compounds  will  become
         Collaboration  Products  upon  Wyeth-Ayerst's  decision  that  the Lead
         Compound is a suitable clinical  candidate or Wyeth-Ayerst  shall elect
         to file an IND  with  respect  to such  Lead  Compound.  Wyeth-Ayerst's
         determination  that a Lead  Compound is a suitable  clinical  candidate
         will be based on its  preclinical  profile  and  competitive  and other
         commercial considerations.

6.4      Designation of Lead  Compounds and  Collaboration  Products.  It is the
         Parties'  intention  that the licenses set forth in Articles  Three and
         Twelve and all rights  granted by either Party  hereunder be limited to
         Lead Compounds and  Collaboration  Products and neither Party grants to
         the  other  any right or  license  in or to Patent  Rights or any other
         rights a Party  may have in its  Proprietary  Chemical  Library  or any
         Compounds included therein that are not Lead Compounds or Collaboration
         Products.  The  Parties  agree  that  during  the term of the  Research
         Program (a) a compound may only be  designated a Lead Compound upon the
         determination of the Steering Committee,  as recorded in the minutes of
         a Steering  Committee  meeting or by  written  consent of the  Steering
         Committee, that such compound meets the criteria set forth herein for a
         Lead  Compound  and  (b) a Lead  Compound  may  only  be  designated  a
         Collaboration  Product  upon  Wyeth-Ayerst's   written  notice  to  the
         Steering  Committee that  Wyeth-Ayerst has elected to initiate clinical
         development  with respect to the Lead  Compound.  After the term of the
         Research Program, a compound will only be designated a Lead Compound or
         a  Collaboration  Product  hereunder upon timely written notice (within
         sixty (60) days after the  determination  or election  set forth below)
         from  Wyeth-Ayerst  to Neurocrine  describing  the compound and setting
         forth  Wyeth-Ayerst's   determination  that  such  compound  meets  the
         criteria  set  forth  herein  for a  Lead  Compound  or  Wyeth-Ayerst's
         election to initiate clinical  development of a Lead Compound elevating
         the Lead Compound to Collaboration Product status hereunder.



                                 ARTICLE SEVEN
                DEVELOPMENT, MANUFACTURING AND COMMERCIALIZATION

7.1      Wyeth-Ayerst  Development.  Wyeth-Ayerst will,  directly and/or through
         Third  Parties,  use  Commercially  Reasonable  Efforts to complete the
         preclinical development, conduct, fund and make all decisions regarding
         the clinical development of Collaboration  Products.  Wyeth-Ayerst will
         have complete control,  authority and responsibility for the regulatory
         strategies  adopted for the clinical  development of all  Collaboration
         Products and will own all Regulatory  Filings and Regulatory  Approvals
         relating to any Lead Compound or Collaboration Product.

7.2      Progress Reports. After the end of the Research Program,  Wyeth-Ayerst,
         within sixty (60) days after each June 30 and December 31, will provide
         Neurocrine  with a report  summarizing  the  status  of  Wyeth-Ayerst's
         clinical development  activities during the six (6) month period ending
         on such  June 30 or  December  31,  as  applicable,  for  Collaboration
         Products then in active  development by Wyeth-Ayerst  and summarize the
         development plans for Collaboration  Products for the following six (6)
         month period, provided, however, that Wyeth-Ayerst's failure to achieve
         any of the goals or plans set forth in any such  summary  shall not, in
         and of itself, constitute a failure by Wyeth-Ayerst to use Commercially
         Reasonable Efforts to develop Collaboration Products hereunder.

7.3      Manufacturing.  Wyeth-Ayerst shall use Commercially  Reasonable Efforts
         to  manufacture   Collaboration   Products,   directly  and/or  through
         contracted  Third Parties for sale in those  countries of the Territory
         where such Collaboration Products have received Regulatory Approval.

7.4      Commercialization of Collaboration  Products.  Wyeth-Ayerst in its sole
         discretion will make all decisions regarding the  commercialization and
         sales and marketing of Collaboration Products and will use Commercially
         Reasonable  Efforts to  commercialize  Collaboration  Products in those
         countries of the world where such Collaboration  Products have received
         Regulatory Approval. The use of Commercially  Reasonable Efforts by any
         Affiliate or sublicensee of Wyeth-Ayerst to commercialize Collaboration
         Products in a country  shall satisfy  Wyeth-Ayerst's  obligation to use
         Commercially  Reasonable  Efforts to commercialize  such  Collaboration
         Product in such country.

7.5      Co-Promotion. On a Collaboration Product by Collaboration Product basis
         at  the  time  of  NDA  filing,   if  Neurocrine  can   demonstrate  to
         Wyeth-Ayerst's  reasonable  satisfaction that Neurocrine has commercial
         presence in a United States or Canadian  market  segment not covered by
         Wyeth-Ayerst or, in Wyeth-Ayerst's  view, not sufficiently  covered and
         capability  to  promote  such  Collaboration  Product  in  such  market
         segment,  Wyeth-Ayerst and Neurocrine will discuss[***] co-promote such
         Collaboration  Product in the United States and Canada.  If the Parties
         agree that it would be in the commercial  best interests of the Parties
         for  Wyeth-Ayerst  and Neurocrine to so co-promote  such  Collaboration
         Product, the Parties will, [***], use good faith efforts to negotiate a
         co-promotion agreement setting forth the rights and obligations of each
         Party,  including,  without  limitation,  payments to be made by either
         Party  to  the  other  Party  and   responsibility  for  marketing  and
         promotional expenses. If, (i) [***],  Neurocrine either fails to notify
         Wyeth-Ayerst of its desire to co-promote such Collaboration  Product or
         fails to demonstrate to  Wyeth-Ayerst's  reasonable  satisfaction  that
         Neurocrine  has the  required  commercial  presence and  capability  to
         promote such Collaboration  Product,  or (ii) the Parties fail to enter
         into a co-promotion  agreement by the end of the [***] period described
         above in this Section 7.5,  Wyeth-Ayerst  shall  thereafter be free, at
         its sole  election,  to enter into a  co-promotion  agreement  with any
         Third Party with respect to such Collaboration Product.


                                  ARTICLE EIGHT
                                  LICENSE FEES

8.1      License  Fees.  Each of the  following  License Fees will be payable to
         Neurocrine one-time only within thirty (30) days following confirmation
         by the Steering Committee that the specified event has occurred.

<TABLE>
<CAPTION>
                                      Event                                          Payment
             <S>                                                                     <C> 
  
             Validation  of [***] model of  Neurodegeneration  [***] (such model     [***]     
             and criteria for  validation  to be selected and agreed upon by the
             Steering  Committee as soon as practicable after the first Steering
             Committee meeting)

             Completion of screening of [***] compounds selected by the Steering     [***]     
             Committee  from  the  Neurocrine   Proprietary   Chemical  Library,
             Wyeth-Ayerst   Proprietary   Chemical  Library  and/or  some  other
             library(ies)  selected by the Steering  Committee  for the first to
             complete  of  [***]  using   Neurocrine's   novel  High  Throughput
             Screening ("HTS")  technology,  provided,  however,  that the [***]
             compounds  selected by the Steering  Committee  must all be readily
             available to  Neurocrine  in 96 well plates  suitable for screening
             and within a timeframe  that will not  materially  or  unreasonably
             delay Neurocrine's screening efforts

             The  later  to  occur  of (i)  completion  of  screening  of  [***]     [***]     
             compounds  selected by the Steering  Committee  from the Neurocrine
             Proprietary  Chemical Library,  Wyeth-Ayerst  Proprietary  Chemical
             Library  and/or some other  library(ies)  selected by the  Steering
             Committee  for the second to complete  of [***] using  Neurocrine's
             HTS technology and (ii) the [***] anniversary of the Effective Date

             [***]  target  validation  of [***] in a model [***] (such mode and     [***]     
             criteria  for  validation  to be  selected  and agreed  upon by the
             Steering  Committee as soon as practicable after the first Steering
             Committee meeting)

             [***]  validation  of [***] in a model (such model and criteria for     [***]
             validation to be selected and agreed upon by the Steering Committee
             as soon as practicable after the first Steering Committee meeting)

             [***] target  validation of [***] in an appropriate model for [***]     [***]
             (such model and criteria for  validation  to be selected and agreed
             upon by the  Steering  Committee as soon as  practicable  after the
             first Steering Committee meeting)

             [***]  validation of the [***] in an  appropriate  model for [***],     [***]    
             (such model and criteria for validation and disease  category to be
             selected  and  agreed  upon by the  Steering  Committee  as soon as
             practicable after the first Steering Committee meeting)
</TABLE>
        
         For the  purposes  of the  foregoing,  Neurocrine's  HTS  for  activity
         against [***] will be deemed `complete' when [***]compounds selected by
         the Steering  Committee  have been screened for activity  against [***]
         and  Neurocrine  has prepared and  delivered  to  Wyeth-Ayerst  a final
         report  setting forth the results.  Upon the  achievement of a Licensee
         Fee  triggering  event for [***],  any License  Fees  relating to prior
         triggering  events for [***] which have not been paid,  shall be deemed
         payable.

8.2      Additional License Fees. The following  additional License Fees will be
         payable  to  Neurocrine   [***]  only   regardless  of  the  number  of
         Collaboration   Products  and  the  number  of  indications   for  each
         Collaboration Product developed and commercialized.

<TABLE>
<CAPTION>
                                                                                     Additional
                            Event                                                   License Fee
             <S>                                                                     <C>       
             Filing, by Wyeth-Ayerst, of an IND in the United States                 [***]
             permitting the clinical study of [***]

             Filing, by Wyeth-Ayerst, of an IND in the United States                 [***]
             permitting the clinical study of [***]

             Filing, by Wyeth-Ayerst, of an IND in the United States                 [***]
             permitting the clinical study of [***]

             Filing, by Wyeth-Ayerst, of an IND in the United States                 [***]
             permitting the clinical study of [***]

             Achievement, by Wyeth-Ayerst, of ICE for the [***]                      [***]

             Achievement, by Wyeth-Ayerst, of ICE for the [***]                      [***]

             Achievement, by Wyeth-Ayerst, of ICE for the [***]                      [***]

             Achievement, by Wyeth-Ayerst, of ICE for the [***]                      [***]

             Initiation, by Wyeth-Ayerst, of a Pivotal Trial to study                [***]
             the [***]

             Initiation, by Wyeth-Ayerst, of a Pivotal Trial to study                [***]
             the [***]

             Initiation, by Wyeth-Ayerst, of a Pivotal Trial to study                [***]
             the [***]

             Initiation, by Wyeth-Ayerst, of a Pivotal Trial to study                [***]
             the [***]

             Filing, by Wyeth-Ayerst,  of an NDA in the United States,               [***]
             and  acceptance,  by the  FDA,  of such  NDA  for  filing
             seeking  Regulatory  Approval in the United States of the
             [***]

             Filing, by Wyeth-Ayerst,  of an NDA in the United States,               [***]
             and  acceptance,  by the  FDA,  of such  NDA for  filing,
             seeking  Regulatory  Approval in the United States of the
             [***]

             Filing, by Wyeth-Ayerst,  of an NDA in the United States,               [***]    
             and  acceptance,  by the  FDA,  of such  NDA for  filing,
             seeking  Regulatory  Approval in the United States of the
             [***]

             Filing,  by Wyeth-Ayerst,  of an NDA in the United States               [***]     
             and  acceptance,  by the  FDA,  of such  NDA for  filing,
             seeking  Regulatory  Approval in the United States of the
             [***]

             Filing,  by  Wyeth-Ayerst,  of an NDA in Europe (either a               [***]     
             centralized  filing  or filing in at least one (1) of the
             European Major Market Countries),  and acceptance, by the
             applicable European Regulatory  Authorities,  of such NDA
             for  filing,  seeking  Regulatory  Approval in Europe (or
             such European country) of the [***]

             Filing,  by  Wyeth-Ayerst,  of an NDA in Europe (either a               [***]     
             centralized  filing  or filing in at least one (1) of the
             European Major Market Countries),  and acceptance, by the
             appropriate European Regulatory Authorities,  of such NDA
             for filing seeking Regulatory Approval in Europe (or such
             European country) of the [***]

             Filing,  by  Wyeth-Ayerst,  of an NDA in Europe (either a               [***]     
             centralized  filing  or filing in at least one (1) of the
             European Major Market Countries),  and acceptance, by the
             applicable European Regulatory  Authorities,  of such NDA
             for filing seeking Regulatory Approval in Europe (or such
             European country) of the [***]

<PAGE>

             Filing,  by  Wyeth-Ayerst,  of an NDA in Europe (either a               [***]          
             centralized  filing  or filing in at least one (1) of the
             European Major Market Countries),  and acceptance, by the
             applicable European Regulatory  Authorities,  of such NDA
             for filing seeking Regulatory Approval in Europe (or such
             European country) of the [***]

             United States Regulatory Approval granted to Wyeth-Ayerst               [***]
             for the [***]

             United States Regulatory Approval granted to Wyeth-Ayerst               [***]
             for the [***]

             United States Regulatory Approval granted to Wyeth-Ayerst               [***]
             for the [***]

             United States Regulatory Approval granted to Wyeth-Ayerst               [***]
             for the [***]

             European  (either  centralized  or in at  least  one  (1)               [***]            
             European  Major  Market  Country)   Regulatory   Approval
             granted to Wyeth-Ayerst for the [***]


             European  (either  centralized  or in at  least  one  (1)               [***]          
             European  Major  Market  Country)   Regulatory   Approval
             granted to Wyeth-Ayerst for the [***]

             European  (either  centralized  or in at  least  one  (1)               [***]     
             European  Major  Market  Country)   Regulatory   Approval
             granted to Wyeth-Ayerst for the [***]

             European  (either  centralized  or in at  least  one  (1)               [***]          
             European  Major  Market  Country)   Regulatory   Approval
             granted to Wyeth-Ayerst for the [***]
</TABLE>

         Any additional License Fees paid for a Collaboration Product which does
         not  achieve  Regulatory  Approval  shall be fully  creditable  against
         Additional License Fees that may be payable for Collaboration  Products
         subsequently  developed  [***].  No  additional  License  Fee  shall be
         payable  for the  third  or any  subsequent  Collaboration  Product  to
         achieve the specified event.


                             ARTICLE NINE
                               ROYALTIES

9.1      Royalty Rates.  Wyeth-Ayerst  will pay to Neurocrine,  Royalties,  on a
         Collaboration  Product by Collaboration  Product basis, which Royalties
         shall be calculated using the following formula:

                  [***]
                           where,

                           A equals [***] of Wyeth-Ayerst's worldwide Net Sales
                           of such  Collaboration  Product,  which,  during  the
                           calendar year in question, are [***]

                           B equals [***] of Wyeth-Ayerst's  worldwide Net Sales
                           of such  Collaboration  Product,  which,  during  the
                           calendar year in question, [***]; and

                           C equals [***] of Wyeth-Ayerst's  worldwide Net Sales
                           of such  Collaboration  Product,  which,  during  the
                           calendar year in question, are [***].

         By way of example  only,  if,  during a given year,  Wyeth-Ayerst,  its
         Affiliates and  sublicensees  [***] the royalty payable by Wyeth-Ayerst
         to Neurocrine during such year would be calculated as follows:

                  [***]

         Neurocrine acknowledges and agrees that nothing in this Agreement shall
         be construed as  representing  an estimate or  projection of either (i)
         the number of  Collaboration  Products that will or may be successfully
         developed and/or  commercialized  estimate or (ii) anticipated sales or
         the actual value of the Neurocrine Technology, any Lead Compound or any
         Collaboration  Product and that the  figures set forth in this  Section
         9.1 or  elsewhere  in  this  Agreement  or  that  have  otherwise  been
         discussed by the Parties are merely  intended to define  Wyeth-Ayerst's
         royalty  obligations to Neurocrine in the event such sales  performance
         is achieved.  WYETH-AYERST MAKES NO REPRESENTATION OR WARRANTY,  EITHER
         EXPRESS OR IMPLIED, THAT IT WILL BE ABLE TO SUCCESSFULLY DEVELOP AND/OR
         COMMERCIALIZE ANY COLLABORATION PRODUCTS OR, IF COMMERCIALIZED, THAT IT
         WILL  ACHIEVE  ANY  PARTICULAR   SALES  LEVEL  OF  SUCH   COLLABORATION
         PRODUCT(S).

9.2      Royalty Adjustments.  Royalties on a Collaboration  Product are subject
         to  reductions  and  adjustments  as a result of certain  events as set
         forth  below;  provided,  however,  in no  event  will  Royalties  on a
         Collaboration  Product  in  any  country  be  [***]  by  reason  of the
         adjustments set forth below.

         (a)      Royalty Adjustment for Unpatented Products. If, during a given
                  calendar  quarter,  a  Collaboration  Product is an Unpatented
                  Product  in one or  more  countries,  the  Royalties  will  be
                  payable to Neurocrine for the Net Sales of such  Collaboration
                  Product in such  country(ies)  during such calendar quarter at
                  [***] of the  royalty  rate(s) set forth in Section 9.1 above.
                  To calculate the Unpatented Product Royalties, [***]. The fact
                  that a Collaboration  Product is an Unpatented  Product in one
                  country  during  any  calendar  quarter  shall not result in a
                  reduction of the royalty  rate used to  calculate  the Royalty
                  payable  for  sales of  Collaboration  Products  in any  other
                  country during such calendar quarter.

        (b)       Competition.  If Competition  exists,  during a given calendar
                  quarter with respect to a Collaboration  Product in a country,
                  the royalty rate(s) used to calculate the Royalties payable to
                  Neurocrine for the sale of such Collaboration  Product in such
                  country during such calendar quarter will [***] of the royalty
                  rate(s)  set forth in Section  9.1  above.  To  calculate  the
                  Royalties when  Competition  exists in one or more  countries,
                  [***].  The existence of Competition in one country during any
                  calendar  quarter  shall  not  result  in a  reduction  of the
                  royalty rate used to calculate  the Royalty  payable for sales
                  of  Collaboration  Products in any other  country  during such
                  calendar   quarter.   If  at  the  time  of  determining   any
                  Competition adjustments, applicable IMS International data (or
                  such other data as may be mutually  agreed by the Parties) for
                  such  time  period  is  unavailable,  Wyeth-Ayerst  may make a
                  reasonable  estimate  thereof  based  on prior  available  IMS
                  International  data (or  such  other  data as may be  mutually
                  agreed by the Parties) and  calculate the  applicable  Royalty
                  based on such estimate, and any difference in Royalty payments
                  made by  Wyeth-Ayerst  based  on  such  estimate  and  Royalty
                  payments  based  on  actual  data,  once  available,  will  be
                  accounted for by an adjustment  payment by Wyeth-Ayerst at the
                  time the next quarter Royalty payment is made or an adjustment
                  credit against  Wyeth-Ayerst's future Royalty obligations,  as
                  the case may be.

9.3      Term of Royalty.  Royalties will be payable on a country by country and
         Collaboration Product by Collaboration Product basis until the later of
         (i) the last to expire, in such country,  of the Patent Rights included
         within the Collaboration Technology,  [***] or (ii) with respect to the
         sale of such Collaboration  Product in countries of the European Union,
         [***] from First Commercial Sale of such  Collaboration  Product in the
         European  Union and,  with  respect  to the sale of such  Collaboration
         Product in any country outside of the European Union,  [***] from First
         Commercial Sale of such Collaboration Product in such country. Upon the
         expiration of Wyeth-Ayerst's  obligation to pay Royalties to Neurocrine
         hereunder with respect to a Collaboration  Product,  Wyeth-Ayerst shall
         have a fully paid,  irrevocable,  exclusive  and  unrestricted  license
         under the Collaboration Technology to make, have made, use, sell, offer
         to sell and import such Collaboration Product.

9.4      Reports and Payments.

         (a)      Cumulative  Royalties.  The obligation to pay Royalties  under
                  this  Article Nine shall be imposed only once (i) with respect
                  to any sale of the same unit of Collaboration Product and (ii)
                  with  respect  to  a  single  unit  of  Collaboration  Product
                  regardless of how many Valid Claims of Patent Rights  included
                  in the Collaboration Technology would, but for this Agreement,
                  be  infringed  by  the  making,   using  or  selling  of  such
                  Collaboration Product.

        (b)       Statements  and  Payments.   Wyeth-Ayerst   shall  deliver  to
                  Neurocrine  within  sixty  (60)  days  after  the  end of each
                  calendar  quarter,  a  report  certified  by  Wyeth-Ayerst  as
                  accurate to the best of its ability based on information  then
                  available to  Wyeth-Ayerst,  setting  forth for such  calendar
                  quarter the following information on a country-by-country  and
                  Collaboration  Product by Collaboration Product basis: (i) Net
                  Sales of such Collaboration  Product in such country, (ii) the
                  basis for any  adjustments to the Royalty payable for the sale
                  of such  Collaboration  Product in such  country and (iii) the
                  Royalty  due  hereunder  for the  sale  of such  Collaboration
                  Product in such country. The total Royalty due for the sale of
                  Collaboration  Products during such calendar  quarter shall be
                  remitted at the time such report is made.

        (c)       Taxes and Withholding.  All payments under this Agreement will
                  be made without any deduction or withholding for or on account
                  of any tax unless such deduction or withholding is required by
                  applicable  law or  regulations.  If the  paying  Party  is so
                  required  to deduct or withhold  such Party will (i)  promptly
                  notify the other  Party of such  requirement,  (ii) pay to the
                  relevant  authorities  the full amount required to be deducted
                  or withheld promptly upon the earlier of determining that such
                  deduction or withholding is required or receiving  notice that
                  such amount has been assessed  against the other Party,  (iii)
                  promptly  forward to the other Party an  official  receipt (or
                  certified copy) or other documentation  reasonably  acceptable
                  to the other Party evidencing such payment to the authorities.
                  In case the other Party can not take a full credit against its
                  tax liability for the  withholding tax deducted or withheld by
                  the paying  Party,  then such other Party may propose a change
                  to the then  current  arrangement  with respect to the flow of
                  moneys  under this  Agreement  in order to reduce or eliminate
                  the  extra  cost  for  any  Party  and  the  Parties,  with no
                  obligation as to outcome,  shall discuss such proposal in good
                  faith.

         (d)      Currency. All amounts payable and calculations hereunder shall
                  be in United States dollars. As applicable, Net Sales shall be
                  translated  into  United  States  dollars in  accordance  with
                  Wyeth-Ayerst's  customary  and usual  translation  procedures,
                  consistently applied.

        (e)       Maintenance  of  Records;  Audit.  For a period  of three  (3)
                  years,   Wyeth-Ayerst  shall  maintain  and  shall  cause  its
                  Affiliates and sublicensees to maintain  complete and accurate
                  books and records in connection with the sale of Collaboration
                  Products  hereunder,   as  necessary  to  allow  the  accurate
                  calculation  of Royalties due hereunder  including any records
                  required to calculate any Royalty adjustments hereunder.  Once
                  per calendar year Neurocrine shall have the right to engage an
                  independent  accounting  firm acceptable to  Wyeth-Ayerst,  at
                  Neurocrine's expense, which shall have the right to examine in
                  confidence  the  relevant   Wyeth-Ayerst  records  as  may  be
                  reasonably  necessary to determine and/or verify the amount of
                  Royalty  payments due  hereunder.  Such  examination  shall be
                  conducted during  Wyeth-Ayerst's  normal business hours, after
                  at  least   fifteen   (15)  days  prior   written   notice  to
                  Wyeth-Ayerst   and  shall  take  place  at  the   Wyeth-Ayerst
                  facility(ies)  where such  records are  maintained.  Each such
                  examination  shall be limited to  pertinent  books and records
                  for any year ending not more than thirty-six (36) months prior
                  to the date of request.  Before  permitting  such  independent
                  accounting  firm to have  access to such  books  and  records,
                  Wyeth-Ayerst may require such independent  accounting firm and
                  its   personnel   involved   in   such   audit,   to   sign  a
                  confidentiality  agreement (in form and  substance  reasonably
                  acceptable to Wyeth-Ayerst) as to any of  Wyeth-Ayerst's,  its
                  Affiliates or sublicensees'  confidential information which is
                  to be  provided  to  such  accounting  firm or to  which  such
                  accounting firm will have access,  while  conducting the audit
                  under  this  Section  9.5  (e).  The  Neurocrine   independent
                  accounting  firm will  prepare and provide to both  Neurocrine
                  and Wyeth-Ayerst a written report  disclosing only whether the
                  Royalty  reports  submitted and Royalties paid by Wyeth-Ayerst
                  are correct or incorrect and the specific  details  concerning
                  any  discrepancies.  No other information shall be provided to
                  Neurocrine.  In  the  event  there  was  an  under-payment  by
                  Wyeth-Ayerst hereunder, Wyeth-Ayerst shall promptly (but in no
                  event later than thirty (30) days after Wyeth-Ayerst's receipt
                  of the independent  auditor's report so correctly  concluding)
                  make payment to  Neurocrine  of any  short-fall.  In the event
                  that  there was an  over-payment  by  Wyeth-Ayerst  hereunder,
                  Neurocrine  shall  promptly (but in no event later than thirty
                  (30)  days  after  Neurocrine's  receipt  of  the  independent
                  auditor's   report   so   correctly   concluding)   refund  to
                  Wyeth-Ayerst  the excess  amount.  In the event any payment by
                  Wyeth-Ayerst  shall prove to have been  incorrect by more than
                  seven and one-half  percent (7.5%) to Neurocrine's  detriment,
                  Wyeth-Ayerst  will  pay  the  reasonable  fees  and  costs  of
                  Neurocrine's independent auditor for conducting such audit.

9.5      Third Party Payments.

        (a)       OHSU  Agreement.  The Parties have agreed to share equally the
                  royalty  payments to OHSU required under paragraph 6.02 of the
                  OHSU Agreement (the "Shared  Obligation").  All other payments
                  under  the  OHSU  Agreement  shall  be the  responsibility  of
                  Neurocrine.  Neurocrine  shall be  responsible  for making all
                  payments due under the OHSU License  Agreement and, within ten
                  (10) days of making any payment  required under paragraph 6.02
                  of  the  OHSU   Agreement,   Neurocrine   shall   provide   to
                  Wyeth-Ayerst  documentary  evidence that such payment has been
                  made. Within thirty (30) days after Wyeth-Ayerst receives from
                  Neurocrine such documentary  evidence,  Wyeth-Ayerst shall pay
                  to  Neurocrine an amount equal to [***] of the payments due to
                  the Oregon Health  Sciences  University  pursuant to [***] for
                  Licensed  Patent  Rights (as  defined  in the OHSU  Agreement)
                  included in the Neurocrine Technology licensed to Wyeth-Ayerst
                  hereunder, provided, however, that any credits that may accrue
                  to  Neurocrine  by reason of  payments by  Neurocrine  to OHSU
                  pursuant  to  [***]  will  be  considered  a  credit   against
                  Neurocrine's  portion of Shared  Obligation,  and any  credits
                  that may accrue pursuant to [***] or Wyeth-Ayerst, as the case
                  may be, will be considered a credit  against  Neurocrine's  or
                  Wyeth-Ayerst's,    respectively,   portion   of   the   Shared
                  Obligation.

        (b)       Neurocrine  Technology.  [***] from any Third Party  owning or
                  Controlling  Patent  Rights  which would be infringed by [***]
                  under this  Agreement,  a license  under such  Patent  Rights,
                  which  license  would permit [***] will be solely  responsible
                  for paying [***] of the license fees and royalties that may be
                  payable to any such Third  Party for such  license(s).  In the
                  event [***] fails or in unable to negotiate an agreement  with
                  such Third Party  within [***] may  negotiate  such license on
                  terms reasonably  agreed to by [***] and in the event [***] in
                  obtaining such license on terms agreed to by [***] in its good
                  faith business judgment [***] amounts payable  thereunder.  If
                  [***] is  unable to agree as to  whether  it is  necessary  to
                  obtain such a license from a Third  Party,  the issue shall be
                  referred to [***].

         (c)      Collaboration  Products.  Except  as set  forth in (a) and (b)
                  above,  [***]  determining  whether to  negotiate an agreement
                  with any Third  Party  that owns or  Controls  a Patent  Right
                  claiming the manufacture or use of any Collaboration  Product.
                  [***] from any Third Party owning or Controlling Patent Rights
                  which would be infringed by the  development  and sale of Lead
                  Compounds  and  Collaboration  Products,  a license under such
                  Patent Rights,  and in the event [***] obtains such a license,
                  [***]  shall pay [***] that may be payable to such Third Party
                  for such license(s).

        (d)       Third Party Licenses.  Any rights to Third Party Patent Rights
                  licensed by  Neurocrine or  Wyeth-Ayerst,  as the case may be,
                  under  paragraphs  (b)  and (c)  above,  shall  be  considered
                  Neurocrine    Technology    or    Wyeth-Ayerst     Technology,
                  respectively.  In each case, Wyeth-Ayerst and Neurocrine shall
                  use their Commercially  Reasonable Efforts to ensure that such
                  licenses  provide  for the  right to  sublicense  of the Third
                  Party  Patent  Rights in  connection  with the  license of the
                  Neurocrine   Technology  and   Wyeth-Ayerst   Technology  upon
                  termination of this Agreement  pursuant to Article Twelve. Any
                  sublicenses  of Third Party Patent Rights  pursuant to Article
                  Twelve shall be subject to the assumption by the Party to whom
                  the rights are  sublicensed  of all  payment  and  performance
                  obligations in connection with the exercise of the sublicensed
                  rights by such Party.


                                   ARTICLE TEN
                        CONFIDENTIALITY, PUBLICATION AND
                              PUBLIC ANNOUNCEMENTS

10.1     Confidentiality.  Except to the  extent  expressly  authorized  by this
         Agreement or otherwise  agreed in writing,  the Parties agree that, for
         the term of this  Agreement and for [***],  each Party (the  "Receiving
         Party"),  receiving hereunder any information  designated  hereunder as
         Confidential Information of the other Party or information of the other
         Party marked  "Confidential" (in either case, the "Disclosing  Party"),
         shall  keep such  information  confidential  and shall not  publish  or
         otherwise disclose or use for any purpose other than as provided for in
         this Agreement except, to the extent that it can be established:

        (a)       by the Receiving Party that the  Confidential  Information was
                  already  known to the  Receiving  Party  (other  than under an
                  obligation of  confidentiality),  at the time of disclosure by
                  the Disclosing  Party and such Receiving Party has documentary
                  evidence to that effect;

        (b)       by the Receiving Party that the  Confidential  Information was
                  generally  available  to the public or  otherwise  part of the
                  public  domain at the time of its  disclosure to the Receiving
                  Party;

        (c)       by the  Receiving  Party  that  the  Confidential  Information
                  became generally  available to the public or otherwise part of
                  the public domain after its disclosure or development,  as the
                  case may be, and other than  through  any act or omission of a
                  party in breach of this confidentiality obligation;

        (d)       by the Receiving Party that the  Confidential  Information was
                  disclosed  to that Party,  other than under an  obligation  of
                  confidentiality, by a Third Party who had no obligation to the
                  Disclosing Party not to disclose such information to others;

        (e)       by the Receiving Party that the  Confidential  Information was
                  independently  discovered or developed by the Receiving  Party
                  without the use of the Confidential  Information  belonging to
                  the  other  Party  and the  Receiving  Party  has  documentary
                  evidence to that effect

10.2     Authorized Disclosure.

        (a)       Each Party. Each Party may disclose  Confidential  Information
                  belonging to the other Party to the extent such  disclosure is
                  reasonably necessary to:

                           (i)      file  or   prosecute   patent   applications
                                    claiming   inventions  included  within  the
                                    Collaboration Technology,

                           (ii)     prosecute or defend litigation,

                           (iii)    exercise  rights  hereunder   provided  such
                                    disclosure    is   covered   by   terms   of
                                    confidentiality  similar  to those set forth
                                    herein, and

                           (iv)     comply with applicable governmental laws and
                                    regulations.

                  In the  event a Party  shall  deem it  necessary  to  disclose
                  pursuant to this  Section 10.2 (a),  Confidential  Information
                  belonging to the other Party,  the  Disclosing  Party shall to
                  the extent  possible give  reasonable  advance  notice of such
                  disclosure to the other Party and take reasonable  measures to
                  ensure confidential treatment of such information.

        (b)       Use.  Wyeth-Ayerst  shall  have the  right  to use  Neurocrine
                  Confidential  Information  in  the  conduct  of  the  Research
                  Program and in developing and  commercializing  Lead Compounds
                  and Collaboration Products. Neurocrine shall have the right to
                  use  Wyeth-Ayerst  Confidential  Information in the conduct of
                  the Research Program and, in the event this Agreement shall be
                  terminated in accordance with Sections 12.3, 12.4,  12.5(a) or
                  12.6,  in  the  development  and   commercialization  of  Lead
                  Compounds  and  Collaboration  Products and  Compounds  [***].
                  Neurocrine  shall  also have the right to use that  portion of
                  the Wyeth-Ayerst  Confidential Information that relates [***].
                  Subject to the license granted in Article Three hereof and the
                  terms of this Article Ten,  each Party shall have the right to
                  use the Joint Confidential Information for any purpose.

10.3     SEC Filings.  The Parties will consult with one another on the terms of
         this Agreement to be redacted in SEC filings.

10.4     Publications.  During the term of the Research Program, each Party will
         submit  to the  other  Party  for  review  and  approval  all  proposed
         academic,  scientific and medical publications relating to the Research
         Program,  Lead Compounds,  Collaboration  Products and/or Collaboration
         Technology  for review in  connection  with  preservation  of exclusive
         Patent  Rights  and/or to determine  whether  Confidential  Information
         should be modified or deleted.  The  nonpublishing  Party shall have no
         less than  thirty (30) days to review each  proposed  publication.  The
         review period may be extended for an additional thirty (30) days in the
         event the  nonpublishing  Party can  demonstrate a reasonable  need for
         such  extension  including,  but not  limited to, the  preparation  and
         filing of patent applications.  By mutual agreement, this period may be
         further  extended.  Wyeth-Ayerst  and Neurocrine  will each comply with
         standard   academic   practice   regarding   authorship  of  scientific
         publications  and  recognition of  contribution of other parties in any
         publications    relating   to   Research   Program,   Lead   Compounds,
         Collaboration Products and/or Collaboration Technology.
10.5     Public Announcements.

         (a)      Coordination.   The  Parties   agree  on  the   importance  of
                  coordinating  their  public   announcements   respecting  this
                  Agreement and the subject matter thereof (other than academic,
                  scientific  or medical  publications  that are  subject to the
                  publication   provision  set  forth  above).   Neurocrine  and
                  Wyeth-Ayerst  will,  from time to time,  and at the request of
                  the other Party  discuss and agree on the general  information
                  content relating to this Agreement, the Research Program, Lead
                  Compounds,   Collaboration   Products   and/or   Collaboration
                  Technology which may be publicly disclosed.

         (b)      Announcements. Neither Party will make any public announcement
                  (whether   required  by  law  or  otherwise)   regarding  this
                  Agreement, the Research Program, Lead Compounds, Collaboration
                  Products and/or Collaboration Technology (other than academic,
                  scientific  or medical  publications  which are subject to the
                  publication  provision  set forth  above)  without  giving the
                  other Party the  opportunity  to review and  comment  prior to
                  release.


                                 ARTICLE ELEVEN
                                 INDEMNIFICATION

11.1     Indemnification  by Wyeth-Ayerst.  Wyeth-Ayerst will indemnify,  defend
         and hold harmless Neurocrine, its Affiliates, and each of its and their
         respective   employees,   officers,   directors  and  agents  (each,  a
         "Neurocrine Indemnified Party") from and against any and all liability,
         loss,  damage,   expense  (including  reasonable  attorneys'  fees  and
         expenses) and cost  (collectively,  a "Liability") which the Neurocrine
         Indemnified  Party may be required to pay to one or more Third  Parties
         resulting  from or arising  out of (i) any claims of any nature  (other
         than claims by Third Parties relating to patent  infringement)  arising
         out (y) the  conduct of the  Research  Program or use of  Collaboration
         Technology  of by,  on behalf of or under  authority  of,  Wyeth-Ayerst
         (other  than  by  Neurocrine)  or  (z)  research,   development  and/or
         commercialization of Lead Compounds and/or  Collaboration  Products by,
         on  behalf  of or  under  authority  of,  Wyeth-Ayerst  (other  than by
         Neurocrine) and/or (ii) any Wyeth-Ayerst representation or warranty set
         forth herein being untrue in any material respect when made,  except in
         each case, to the extent caused by the negligence or willful misconduct
         of Neurocrine or any Neurocrine Indemnified Party.  Notwithstanding the
         foregoing,  Wyeth-Ayerst shall have no obligation to defend,  indemnify
         or hold harmless any Neurocrine  Indemnified Party from and against any
         Liability  arising out of or resulting from the infringement of a Third
         Party Patent Right.

11.2     Indemnification  by Neurocrine.  Neurocrine will indemnify,  defend and
         hold harmless Wyeth-Ayerst,  its Affiliates,  and each of its and their
         respective   employees,   officers,   directors  and  agents  (each,  a
         "Wyeth-Ayerst  Indemnified  Party") from and against and all  Liability
         which the Wyeth-Ayerst  Indemnified Party may be required to pay to one
         or more  Third  Parties  arising  out of (i) any  claims of any  nature
         (other than claims by Third  Parties  relating to patent  infringement)
         arising out of the conduct of the Research Program by, on behalf of, or
         under the authority of Neurocrine  (other than by Wyeth-Ayerst)  and/or
         (ii) any Neurocrine  representation or warranty set forth herein having
         been untrue in any material respect when made,  except in each case, to
         the  extent  caused  by  the   negligence  or  willful   misconduct  of
         Wyeth-Ayerst or any Wyeth-Ayerst Indemnified Party. Notwithstanding the
         foregoing,  Neurocrine shall have no obligation to defend, indemnify or
         hold harmless any Wyeth-Ayerst  Indemnified  Party from and against any
         Liability  arising out of or resulting from the infringement of a Third
         Party Patent Right.

11.3     Procedure.  Each  Party  will  notify the other in the event it becomes
         aware of a claim for which indemnification may be sought hereunder.  In
         case any proceeding (including any governmental investigation) shall be
         instituted  involving  any Party in respect of which  indemnity  may be
         sought  pursuant to this Article Eleven,  such Party (the  "Indemnified
         Party")  shall  promptly  notify  the other  Party  (the  "Indemnifying
         Party") in writing and the  Indemnifying  Party and  Indemnified  Party
         shall meet to discuss how to respond to any claims that are the subject
         matter of such proceeding.  The Indemnifying Party, upon request of the
         Indemnified Party, shall retain counsel reasonably  satisfactory to the
         Indemnified  Party to represent the Indemnified Party and shall pay the
         fees and expenses of such counsel  related to such  proceeding.  In any
         such proceeding,  the Indemnified  Party shall have the right to retain
         its own counsel,  but the fees and expenses of such counsel shall be at
         the expense of the Indemnified Party unless (i) the Indemnifying  Party
         and the  Indemnified  Party shall have mutually agreed to the retention
         of such  counsel  or (ii) the  named  parties  to any  such  proceeding
         (including any impleaded  parties) include both the Indemnifying  Party
         and the  Indemnified  Party and  representation  of both parties by the
         same  counsel  would  be  inappropriate  due  to  actual  or  potential
         differing  interests  between them. All such fees and expenses shall be
         reimbursed as they are incurred.  The  Indemnifying  Party shall not be
         liable  for any  settlement  of any  proceeding  effected  without  its
         written  consent,  but if  settled  with such  consent or if there be a
         final  judgment for the  plaintiff,  the  Indemnifying  Party agrees to
         indemnify the Indemnified  Party from and against any loss or liability
         by reason of such settlement or judgment.  The Indemnifying Party shall
         not, without the written consent of the Indemnified  Party,  effect any
         settlement of any pending or threatened  proceeding in respect of which
         the Indemnified Party is, or arising out of the same set of facts could
         have been, a party and  indemnity  could have been sought  hereunder by
         the Indemnified Party, unless such settlement includes an unconditional
         release of the Indemnified  Party from all liability on claims that are
         the subject matter of such proceeding.

11.4     Insurance. Each Party further agrees to use its Commercially Reasonable
         Efforts to obtain  and  maintain,  during  the term of this  Agreement,
         Commercial  General Liability  Insurance,  including Products Liability
         Insurance,  with reputable and financially secure insurance carriers to
         cover its  indemnification  obligations under Sections 11.1 or 11.2, as
         applicable,  or self-insurance,  with limits of not less than [***] per
         occurrence and in the aggregate.


                                 ARTICLE TWELVE
                              TERM AND TERMINATION

12.1     Government Approvals.

         (a)      Government  Approvals.  Each of  Neurocrine  and  Wyeth-Ayerst
                  shall use its good faith  efforts to eliminate  any concern on
                  the part of any court or  government  authority  regarding the
                  legality of the proposed transaction,  including,  if required
                  by federal or state antitrust authorities, promptly taking all
                  steps to secure  government  antitrust  clearance,  including,
                  without  limitation,   cooperating  in  good  faith  with  any
                  government  investigation  including the prompt  production of
                  documents  and  information  demanded by a second  request for
                  documents and of witnesses if requested.

         (b)      Co-operation.  Neurocrine and Wyeth-Ayerst  will cooperate and
                  use  respectively  all  reasonable  efforts  to make all other
                  registrations,  filings and applications,  to give all notices
                  and to obtain as soon as practicable all governmental or other
                  consents,   transfers,   approvals,   orders,   qualifications
                  authorizations,  permits and  waivers,  if any,  and to do all
                  other things  necessary or desirable for the  consummation  of
                  the transactions as contemplated  hereby.  Neither Party shall
                  be  required,   however,  to  divest  products  or  assets  or
                  materially  change its  business if doing so is a condition of
                  the transactions contemplated by this Agreement.

12.2     Term.  Unless earlier  terminated by mutual agreement of the Parties or
         pursuant to the provisions of this Article Twelve,  this Agreement will
         continue  in  full  force  and  effect  on  a  country-by  country  and
         Collaboration   Product  by  Collaboration   Product  basis  until  the
         obligation  to  pay  Royalties   with  respect  to  the  sale  of  such
         Collaboration  Product in such  country  expires as provided in Section
         9.3 hereof.

12.3     Early  Termination  for [***].  In the event that at any time after the
         [***]  anniversary of the Effective Date, the Steering  Committee shall
         determine that [***] as set forth in Exhibit B Parts 1(a),  1(b),  2(a)
         and 2(b),  has been  demonstrated  for [***] (or, if this Agreement has
         already been terminated with respect to [***] pursuant to Section 12.4,
         the  [***]  subject  to this  Agreement),  Wyeth-Ayerst  may  elect  to
         terminate  this  Agreement  upon [***] months prior  written  notice to
         Neurocrine.  Upon such  termination,  Wyeth-Ayerst will have no further
         funding  obligation  for  the  Research  Program.  In  the  event  this
         Agreement  shall be  terminated  pursuant  to this  Section  12.3,  all
         licenses granted by Neurocrine to Wyeth-Ayerst hereunder will revert to
         Neurocrine and:

                  (i)      Wyeth-Ayerst will disclose to Neurocrine all material
                           Research Program  research and  pre-clinical  data on
                           Hits  generated  prior  to the  date  of  termination
                           provided  such  data  are  reasonably   available  to
                           Wyeth-Ayerst  and Neurocrine  shall have the right to
                           use such data,  at its own risk and  expense,  in its
                           development  of  Compounds  (other than  Wyeth-Ayerst
                           Compounds) which [***]

                   (ii)    Wyeth-Ayerst  will grant to  Neurocrine  a perpetual,
                           irrevocable,  exclusive,  royalty-free,   fully-paid,
                           worldwide  license under the Wyeth-Ayerst  Technology
                           and  Wyeth-Ayerst's  interest in the Joint Technology
                           to make, have made, use,  import,  market,  offer for
                           sale and sell in the Field of Use,  Compounds  (other
                           than Wyeth-Ayerst Compounds) which [***]

                  (iii)    Wyeth-Ayerst   shall   remain  free  to  develop  and
                           commercialize  any Wyeth-Ayerst  Compound,  provided,
                           however,  that such Compound is not developed for any
                           indication in [***] and the continued identification,
                           development  and  commercialization  of such Compound
                           does not utilize Neurocrine Technology.

12.4     Termination of Collaboration Product Development and Commercialization.
         Subject to  satisfaction of  Wyeth-Ayerst's  minimum  Research  Program
         Funding  commitment (i.e.,  [***] of Research Program Funding),  in the
         event that  Wyeth-Ayerst  shall  elect at any time to  discontinue  all
         activities  relating to the  development and  commercialization  of all
         Collaboration Products which [***] or shall elect to discontinue use of
         Commercially    Reasonable    Efforts    in   the    development    and
         commercialization   of   all   Collaboration   Products   which   [***]
         Wyeth-Ayerst  shall provide written notice to Neurocrine  setting forth
         Wyeth-Ayerst's  election to terminate  this  Agreement  with respect to
         [***] and upon Neurocrine's  receipt of such notice this Agreement with
         respect to [***], will terminate.  In the event this Agreement shall be
         terminated  with respect to a Neurocrine  Transporter  pursuant to this
         Section 12.4:

                  (i)      Wyeth-Ayerst will disclose to Neurocrine all material
                           Research Program research,  pre-clinical and clinical
                           data  generated  prior to the date of  termination on
                           Hits,  Lead  Compounds  and  Collaboration   Products
                           relating to the terminated Neurocrine Transporter(s),
                           provided  such  data  are  reasonably   available  to
                           Wyeth-Ayerst  and Neurocrine  shall have the right to
                           use such data,  at its own risk and  expense,  in its
                           development of Compounds [***] which [***]

                  (ii)     Wyeth-Ayerst  will assign  (or,  if the filing  [***]
                           grant a right of cross  reference) to Neurocrine  all
                           Regulatory  Filings relating to Compounds  designated
                           as Lead Compounds and/or Collaboration Products prior
                           to the date of termination  of this Agreement  (other
                           than Lead  Compounds  and/or  Collaboration  Products
                           which are [***] in so far as such Regulatory  Filings
                           relate to [***];

                  (iii)    Wyeth-Ayerst  will grant to  Neurocrine  a perpetual,
                           irrevocable,  exclusive,  royalty-free,   fully-paid,
                           worldwide license under the [***] to make, have made,
                           use,  sell and import in the Field of Use,  Compounds
                           including Compounds  designated as Lead Compounds and
                           Collaboration   Products   prior   to  the   date  of
                           termination of this  Agreement  (but excluding  [***]
                           only [***] in which [***]

                  (iv)     Wyeth-Ayerst will enter into good faith  negotiations
                           with Neurocrine  regarding the grant to Neurocrine of
                           the  licenses as set forth in (A), (B) and (C) below,
                           to  allow  Neurocrine  to  continue  to  develop  and
                           commercialize,  [***] designated as Lead Compounds or
                           Collaboration   Products   prior   to  the   date  of
                           termination of this Agreement:

                            (A)      an exclusive,  worldwide  license under the
                                     [***]  to make,  have  made,  use,  import,
                                     offer for sale and sell in the Field of Use
                                     [***] which are [***],  such  license to be
                                     on   commercially   reasonable   terms  and
                                     conditions  mutually  agreed by the Parties
                                     including, without limitation, provision of
                                     payments  intended to reflect both Parties'
                                     investment   and    opportunity   in   such
                                     Compounds  and  royalties  on net  sales of
                                     such   [***]  the   Royalties   payable  by
                                     Wyeth-Ayerst  to  Neurocrine  hereunder and
                                     other    terms   and    conditions    which
                                     Wyeth-Ayerst    believes   are   reasonable
                                     necessary    or    desirable   to   protect
                                     Wyeth-Ayerst's  research,  development  and
                                     commercialization activities for [***];

                            (B)      an exclusive,  worldwide  license under the
                                     [***]  to make,  have  made,  use,  import,
                                     offer for sale and sell in the Field of Use
                                     only [***] in which [***], such licenses to
                                     be on  commercially  reasonable  terms  and
                                     conditions  mutually  agreed by the Parties
                                     including, without limitation, provision of
                                     payments  intended to reflect both Parties'
                                     investment   and    opportunity   in   such
                                     Compounds  and  royalties  on net  sales of
                                     such   [***]  the   Royalties   payable  by
                                     Wyeth-Ayerst  to  Neurocrine  hereunder and
                                     other    terms   and    conditions    which
                                     Wyeth-Ayerst    believes   are   reasonable
                                     necessary    or    desirable   to   protect
                                     Wyeth-Ayerst's  research,  development  and
                                     commercialization activities for [***];

                            (C)      an exclusive,  worldwide  license under the
                                     [***]  to make,  have  made,  use,  import,
                                     offer for sale and sell in the Field of Use
                                     only [***] in which [***], such licenses to
                                     be on  commercially  reasonable  terms  and
                                     conditions  mutually  agreed by the Parties
                                     including, without limitation, provision of
                                     payments  intended to reflect both Parties'
                                     investment   and    opportunity   in   such
                                     Compounds  and  royalties  on net  sales of
                                     such    [***]    Royalties    payable    by
                                     Wyeth-Ayerst  to  Neurocrine  hereunder and
                                     other    terms   and    conditions    which
                                     Wyeth-Ayerst    believes   are   reasonable
                                     necessary    or    desirable   to   protect
                                     Wyeth-Ayerst's  research,  development  and
                                     commercialization activities [***]

                           (D)      upon the grant of the  licenses set forth in
                                    (A), (B) and/or (C) above, Wyeth-Ayerst will
                                    assign  (or,  if the  filing  [***]  grant a
                                    right of cross  reference) to Neurocrine all
                                    Regulatory  Filings  on  [***]  that are the
                                    subject  of the  license  in so far as  such
                                    Regulatory  Filings relate [***] which [***]
                                    and

                   (v)     Wyeth-Ayerst  shall  remain  free to  develop  and/or
                           sublicense  any  [***]  to Third  Parties,  provided,
                           however, in no event will Wyeth-Ayerst  commercialize
                           or sublicense  Third Parties to  commercialize  [***]
                           designated   as  Lead   Compounds  or   Collaboration
                           Products  prior  to the date of  termination  of this
                           Agreement (a) for [***] and (b) if the identification
                           or continued  development  and  commercialization  of
                           such Compound utilizes Neurocrine Technology.

         Notwithstanding the foregoing, Wyeth-Ayerst shall have no obligation to
         negotiate or grant any of the  licenses set forth in (iv) (A),  (B), or
         (C) above with respect to [***].

12.5     Default.

         (a)      Wyeth-Ayerst.  Upon the  Default  by  Wyeth-Ayerst  under this
                  Agreement,  Neurocrine may notify Wyeth-Ayerst of such Default
                  and require that  Wyeth-Ayerst cure such Default within [***],
                  provided,  however, that if such Default is not susceptible of
                  cure   within   [***]   period  and   Wyeth-Ayerst   uses  its
                  Commercially  Reasonable  Efforts to cure such  default,  such
                  [***]  period  shall  be  extended  to  [***].  In  the  event
                  Wyeth-Ayerst  shall not have  cured the  Default at the end of
                  the period specified in the preceding sentence, Neurocrine may
                  upon written notice to  Wyeth-Ayerst  terminate this Agreement
                  and upon such termination:

                           (i)      all licenses granted by Neurocrine to Wyeth-
                                    Ayerst herein will revert to Neurocrine:

                           (ii)     Wyeth-Ayerst   will   satisfy   its  minimum
                                    Research Funding commitment  hereunder [***]
                                    to the extent not previously satisfied;

                           (iii)    Wyeth-Ayerst will disclose to Neurocrine all
                                    material    Research    Program    research,
                                    pre-clinical and clinical data on Hits, Lead
                                    Compounds   and    Collaboration    Products
                                    generated  prior to the date of  termination
                                    of this  Agreement,  provided  such data are
                                    reasonably  available  to  Wyeth-Ayerst  and
                                    Neurocrine  thereafter  shall have the right
                                    to use  such  data,  at  its  own  risk  and
                                    expense,  to develop  Compounds  [***] which
                                    [***];

                           (iv)     Wyeth-Ayerst  will assign (or, if the filing
                                    [***] grant a right of cross  reference)  to
                                    Neurocrine all Regulatory  Filings  relating
                                    to Compounds  designated  as Lead  Compounds
                                    and/or  Collaboration  Products prior to the
                                    date of termination of the Agreement  (other
                                    than  Lead  Compounds  and/or  Collaboration
                                    Products  that  are  [***] in so far as such
                                    Regulatory  Filings  relate  [***]  in which
                                    [***];

                           (v)      Wyeth-Ayerst  will  grant  to  Neurocrine  a
                                    perpetual,      irrevocable,      exclusive,
                                    royalty-free,  fully-paid, worldwide license
                                    under [***] to make, have made, use, import,
                                    market, offer for sale and sell in the Field
                                    of  Use,   Compounds   including   Compounds
                                    designated   as   Lead   Compounds    and/or
                                    Collaboration  Products prior to the date of
                                    termination  of this  Agreement  [***]  only
                                    [***] in which [***];

                            (vi)     Wyeth-Ayerst  will grant to  Neurocrine  an
                                     exclusive, worldwide license under [***] to
                                     make, have made, use, import, market, offer
                                     for sale and sell in the  Field of Use only
                                     [***]  in  which   [***]  which  have  been
                                     designated   as   Lead   Compounds   and/or
                                     Collaboration Products prior to the date of
                                     termination of this Agreement, such license
                                     to be on commercially  reasonable terms and
                                     conditions  to be  mutually  agreed  by the
                                     Parties  including  provision  of  payments
                                     intended   to   reflect    both    Parties'
                                     investment   and    opportunity   in   such
                                     Compounds  and  royalties  on net  sales of
                                     [***] Royalties  payable by Wyeth-Ayerst to
                                     Neurocrine  hereunder  provided,   however,
                                     that Wyeth-Ayerst  shall have no obligation
                                     to  negotiate  or grant  any  license  with
                                     respect to any [***]

                           (vii)    upon the grant of the  licenses set forth in
                                    (vi) above, Wyeth-Ayerst will assign (or, if
                                    the filing is not [***] in which [***] grant
                                    a right of cross  reference)  to  Neurocrine
                                    all Regulatory  Filings on the  Wyeth-Ayerst
                                    Compounds   that  are  the  subject  of  the
                                    license in so far as such Regulatory Filings
                                    relates [***] in which [***]; and

                           (viii)   Wyeth-Ayerst  shall  remain  free to develop
                                    and/or  sublicense [***] provided,  however,
                                    in no event will Wyeth-Ayerst  commercialize
                                    or sublicense Third Parties to commercialize
                                    any [***]  designated  as Lead  Compounds or
                                    Collaboration  Products prior to the date of
                                    termination  of this Agreement (a) for [***]
                                    in    which    [***]    and   (b)   if   the
                                    identification,  continued  development  and
                                    commercialization  of such Compound utilizes
                                    Neurocrine Technology.

         (b)      Neurocrine.   Upon  the  Default  by  Neurocrine   under  this
                  Agreement,  Wyeth-Ayerst may notify Neurocrine of such Default
                  and require that  Neurocrine  cure such Default  within [***],
                  provided,  however, that if such Default is not susceptible of
                  cure  within  such  [***]  period  and  Neurocrine   uses  its
                  Commercially  Reasonable  Efforts to cure such  default,  such
                  [***]  period  shall  be  extended  to  [***].  In  the  event
                  Neurocrine  shall not have cured the Default within the period
                  specified in the  preceding  sentence,  Wyeth-Ayerst  may upon
                  written notice to Neurocrine elect to terminate this Agreement
                  and upon such termination:

                           (i)      Neurocrine  will  grant  to  Wyeth-Ayerst  a
                                    perpetual,    irrevocable,    non-exclusive,
                                    royalty-free,  fully paid, worldwide license
                                    under the Neurocrine  Transporter Technology
                                    to make,  have made,  use,  import,  market,
                                    offer for sale and sell in the Field of Use,
                                    Compounds (other than Neurocrine  Compounds)
                                    which [***]

                           (ii)     Neurocrine  will  grant  to  Wyeth-Ayerst  a
                                    perpetual,      irrevocable,      exclusive,
                                    royalty-free,  fully paid, worldwide license
                                    under   the   Neurocrine    Technology   and
                                    Neurocrine's    interest    in   the   Joint
                                    Technology to make, have made, use,  import,
                                    market, offer for sale and sell in the Field
                                    of Use,  Compounds  (other  than  Neurocrine
                                    Compounds), only [***] in which [***]

                           (iii)    Neurocrine  will  grant to  Wyeth-Ayerst  an
                                    exclusive,  royalty-free,  worldwide license
                                    under   the   Neurocrine    Technology   and
                                    Neurocrine's    interest    in   the   Joint
                                    Technology to develop, make, have made, use,
                                    import,  market,  offer for sale and sell in
                                    the Field of Use, Neurocrine Compounds which
                                    have  been   designated  as  Lead  Compounds
                                    and/or  Collaboration  Products prior to the
                                    date of  termination  of this Agreement only
                                    [***].

12.6     Bankruptcy. Each party may, in addition to any other remedies available
         to it by law or in  equity,  exercise  the  rights  set forth  below by
         written notice to the other Party (the "Insolvent Party"), in the event
         the Insolvent Party shall have become  insolvent or bankrupt,  or shall
         have made an  assignment  for the  benefit of its  creditors,  or there
         shall have been appointed a trustee or receiver of the Insolvent  Party
         or for  all or a  substantial  part  of its  property,  or any  case or
         proceeding  shall  have  been  commenced  or other  action  taken by or
         against the Insolvent  Party in  bankruptcy or seeking  reorganization,
         liquidation,   dissolution,  winding-up  arrangement,   composition  or
         readjustment  of its debts or any other  relief  under any  bankruptcy,
         insolvency,   reorganization  or  other  similar  act  or  law  of  any
         jurisdiction  now or  hereafter  in  effect,  or there  shall have been
         issued a warrant of attachment, execution, distraint or similar process
         against any  substantial  part of the property of the Insolvent  Party,
         and  any  such  event  shall  have   continued   for  sixty  (60)  days
         undismissed, unbonded and undischarged. All rights and licenses granted
         under or pursuant to this Agreement by Neurocrine and Wyeth-Ayerst are,
         and shall otherwise be deemed to be, for purposes of Section 365 (n) of
         the U.S. Bankruptcy Code, licenses of rights to "intellectual property"
         as defined under Section 101 of the U.S.  Bankruptcy  Code. The Parties
         agree  that  the  Parties  as  licensees  of  such  rights  under  this
         Agreement,  shall retain and may fully exercise all of their rights and
         elections  under the U.S.  Bankruptcy  Code. The Parties  further agree
         that, in the event of the commencement of a bankruptcy proceeding by or
         against  either Party under the U.S.  Bankruptcy  Code, the other Party
         shall be entitled to a complete duplicate of (or complete access to, as
         appropriate) any such intellectual property and all embodiments of such
         intellectual   property,   and  same,  if  not  already  in  the  their
         possession,  shall  be  promptly  delivered  to them  (i) upon any such
         commencement  of a  bankruptcy  proceeding  upon  its  written  request
         therefor,  unless  the  Party  subject  to such  proceeding  elects  to
         continue to perform all of their  obligations  under this  Agreement or
         (ii) if not  delivered  under (i)  above,  upon the  rejection  of this
         Agreement by or on behalf of the Party subject to such  proceeding upon
         written request therefor by the other Party.

         (a)      Neurocrine. In the event Neurocrine shall be an Insolvent 
                  Party, Wyeth-Ayerst:

                  (i)      may terminate the Research Program; and/or

                  (ii)     keep this  Agreement  in full  force and  effect  and
                           retain  all  licenses   granted  by   Neurocrine   to
                           Wyeth-Ayerst  herein to make, have made, use, import,
                           market,  offer for sale and sell Lead  Compounds  and
                           Collaboration  Products in the Field of Use,  subject
                           to the payment to  Neurocrine of the License Fees and
                           Royalties set forth above.

         (b)      Wyeth-Ayerst.  In the event Wyeth-Ayerst shall be an Insolvent
                  Party,  Neurocrine may, to the extent  permitted by applicable
                  law,  terminate  this  Agreement  and all licenses  granted by
                  Neurocrine  to  Wyeth-Ayerst  herein will revert to Neurocrine
                  and:

                  (i)      Wyeth-Ayerst will disclose to Neurocrine all material
                           Research Program research,  pre-clinical and clinical
                           data  on  Hits,  Lead  Compounds  and   Collaboration
                           Products  generated  prior to the date of termination
                           provided  such  data  are  reasonably   available  to
                           Wyeth-Ayerst and Neurocrine thereafter shall have the
                           right to use such data,  at its own risk and expense,
                           to develop Compounds [***] which [***]

                  (ii)     Wyeth-Ayerst  will  assign  (or, if the filing is not
                           [***]  in  which   [***]   grant  a  right  of  cross
                           reference)  to  Neurocrine  all  Regulatory   Filings
                           relating  to  Lead  Compounds  and/or   Collaboration
                           Products   (other   than   Lead   Compounds    and/or
                           Collaboration  Products  [***])  in so  far  as  such
                           Regulatory Filings relate [***] in which [***];

                  (iii)    Wyeth-Ayerst  will grant to  Neurocrine  a perpetual,
                           irrevocable,  exclusive,  royalty-free,   fully-paid,
                           worldwide  license  [***] to make,  have  made,  use,
                           import,  market, offer for sale and sell in the Field
                           of Use, Compounds ([***]) which [***];

                  (iv)     Wyeth-Ayerst  will grant to Neurocrine,  a perpetual,
                           irrevocable,  exclusive,  royalty  free,  fully-paid,
                           worldwide  license  [***] to make,  have  made,  use,
                           import,  market, offer for sale and sell in the Field
                           of  Use,  Neurocrine  Compounds  designated  as  Lead
                           Compounds and/or Collaboration  Products prior to the
                           date of  termination  of this  Agreement for [***] in
                           which [***];

                  (v)      Wyeth-Ayerst  will grant to  Neurocrine an exclusive,
                           worldwide  license  under  [***] to make,  have made,
                           use, import,  market,  offer for sale and sell in the
                           Field of Use,  [***]  which have been  designated  as
                           Lead Compounds and/or Collaboration Products prior to
                           the date of  termination  of this Agreement for [***]
                           in which [***],  such  license to be on  commercially
                           reasonable  terms and conditions  mutually  agreed by
                           the Parties including  provision of payments intended
                           to reflect both Parties'  investment and  opportunity
                           in such  Compounds and royalties on net sales of such
                           [***]   Royalties   and  License   Fees   payable  by
                           Wyeth-Ayerst  to  Neurocrine  hereunder  and upon the
                           grant of such  license,  Wyeth-Ayerst  will assign to
                           Neurocrine all Regulatory Filings on [***] which have
                           been    designated   as   Lead    Compounds    and/or
                           Collaboration   Products   prior   to  the   date  of
                           termination of this Agreement.

12.7     Acquisition.  Upon the  Acquisition  of Neurocrine by a Third Party (a)
         such that Neurocrine  [***], (b) such that Neurocrine [***], or (c) who
         is [***],  Wyeth-Ayerst  shall  have the right at any time on or before
         [***] following such the completion of such Acquisition to elect one or
         more of the following:

                  (a)      terminate the Research Program;

                  (b)      terminate this Agreement; or

                  (c)      keep this  Agreement  in full  force and  effect  and
                           retain  all  licenses   granted  by   Neurocrine   to
                           Wyeth-Ayerst herein to make, have made, use, sell and
                           import Lead Compounds and Collaboration  Products, in
                           the  Field  of  Use,   subject  to  the   payment  to
                           Neurocrine  of the  License  Fees and  Royalties  set
                           forth above.

12.8     Liabilities.  Termination  of this  Agreement  shall not release either
         Party from any obligation or liability  which shall have accrued at the
         time of termination,  or preclude either Party from pursuing all rights
         at law and in equity with respect to any Default under this  Agreement.
         Notwithstanding  the  foregoing,  neither  Party  will  be  liable  for
         punitive,  exemplary  or  consequential  damages  incurred by the other
         Party arising out of any Default under this Agreement.

12.9     Disclaimer.  WITH  RESPECT  TO ANY DATA,  INFORMATION  OR  INTELLECTUAL
         PROPERTY THAT EITHER PARTY  BECOMES  OBLIGATED TO TRANSFER TO THE OTHER
         UNDER  THIS   ARTICLE   TWELVE,   THE   TRANSFERING   PARTY   MAKES  NO
         REPRESENTATIONS  AND EXPRESSLY DISCLAIMS AND MAKES NO WARRANTIES OF ANY
         KIND,  WRITTEN  OR  ORAL,  EXPRESS  OR  IMPLIED,   INCLUDING,   WITHOUT
         LIMITATION  ANY  WARRANTIES  OF   MERCHANTABILITY   OR  FITNESS  FOR  A
         PARTICULAR PURPOSE, OR THAT ANY SUCH INFORMATION,  DATA OR INTELLECTUAL
         PROPERTY IS ACCURATE OR COMPLETE OR CAN BE USED BY THE RECEIVING  PARTY
         WITHOUT INFRINGING THE INTELLECTUAL PROPERTY RIGHTS OF ANY THIRD PARTY.


                                ARTICLE THIRTEEN
                              INTELLECTUAL PROPERTY

13.1     Inventions. Each Party shall own Patent Rights claiming inventions made
         by  its  employees  or  agents  in  the  performance  of  such  Party's
         obligations under this Agreement (respectively, "Neurocrine Inventions"
         and  "Wyeth-Ayerst  Inventions")  and both  Parties  shall  jointly own
         inventions  made  jointly by employees or agents of both Parties in the
         performance  of  their  obligations   hereunder  ("Joint  Inventions").
         Inventorship  shall be determined in accordance with United States laws
         of inventorship.

13.2     Patent Prosecution.

         (a)      Wyeth-Ayerst    Inventions   and    Collaboration    Products.
                  Wyeth-Ayerst,   at  its   expense,   shall  use   Commercially
                  Reasonable Efforts to prepare,  file, prosecute,  and maintain
                  worldwide   (i)  Patent   Rights   relating  to   Wyeth-Ayerst
                  Inventions  and (ii) Patent  Rights  claiming  Lead  Compounds
                  and/or   Collaboration   Products   exclusively   licensed  to
                  Wyeth-Ayerst hereunder.

         (b)      OHSU Licensed  Patent  Rights.  Consistent  with the terms and
                  conditions of the OHSU  Agreement,  OHSU shall be  responsible
                  for preparation, filing, prosecution and maintenance of Patent
                  Rights  relating to the Licensed  Patent Rights (as defined in
                  the OSHU Agreement) included in the Collaboration  Technology.
                  Wyeth-Ayerst  and  Neurocrine  will [***] after the  Effective
                  Date in connection with the preparation,  filing,  prosecution
                  and maintenance of such Patent Rights.  Wyeth-Ayerst shall pay
                  to Neurocrine  its share of such  expenses  within thirty (30)
                  days  after  Wyeth-Ayerst's  receipt  from  Neurocrine  of  an
                  invoice  therefor,  which  invoice  shall  be  accompanied  by
                  supporting  documentation  showing,  in reasonable detail, the
                  expenses so incurred.

         (c)      Neurocrine   Inventions.    Neurocrine,    [***],   will   use
                  Commercially  Reasonable Efforts to prepare,  file, prosecute,
                  and maintain  worldwide  Patent Rights  relating to Neurocrine
                  Inventions.

         (d)      Joint Inventions.  Wyeth-Ayerst, [***], shall use Commercially
                  Reasonable Efforts to prepare,  file, prosecute,  and maintain
                  worldwide Patent Rights relating to Joint Inventions.

13.3     Enforcement of Patent Rights.

         (a)      Wyeth-Ayerst  Inventions.  Wyeth-Ayerst  shall  have  the sole
                  right but not the  obligation,  in its own name and at its own
                  expense,  to enforce  Patent Rights  relating to  Wyeth-Ayerst
                  Inventions or Wyeth-Ayerst  Technology against any Third Party
                  suspected of infringing a claim of such a Patent Right.

         (b)      Neurocrine Inventions and Joint Inventions. Wyeth-Ayerst shall
                  have the first right, but not the obligation, in its own name,
                  to enforce Patent Rights relating to Neurocrine Inventions and
                  Joint  Inventions,   against  any  Third  Party  suspected  of
                  infringing  a  claim  of such a  Patent  Right.  In the  event
                  Wyeth-Ayerst  shall  not elect to  enforce  any  Patent  Right
                  relating  to  a  Neurocrine   Invention  or  Joint  Invention,
                  Neurocrine  shall have the right to do so. The Party  electing
                  to enforce such Patent  Rights (the  "Enforcing  Party") shall
                  have   exclusive   control   over  the  conduct  of  any  such
                  proceedings,  including the right to settle or compromise such
                  proceedings consistent with Wyeth-Ayerst's licenses hereunder,
                  provided,  however, that the Enforcing Party may not settle or
                  compromise  any such action in a manner which  diminishes  the
                  Patent Rights  relating to any Neurocrine  Inventions  without
                  Neurocrine's  consent or Joint Inventions  without the consent
                  of both Parties or which would impose any financial obligation
                  on the other Party  without such other  Party's  consent.  The
                  expenses of any  proceeding  the  Enforcing  Party  initiates,
                  including  lawyers'  fees  and  costs,  shall  be borne by the
                  Enforcing Party, provided,  however, that the other Party (the
                  "Non-enforcing  Party")  may  elect  to pay  [***] of all such
                  expenses.  The  Non-enforcing  Party will cooperate fully with
                  the  Enforcing  Party  in  such  action  upon  request  by the
                  Enforcing Party. In the event the Non-enforcing  Party has not
                  elected  [***],  any award or recovery  paid to the  Enforcing
                  Party by a Third Party as a result of such patent infringement
                  proceedings  (whether by way of settlement or otherwise) shall
                  first be applied toward reimbursement of legal fees, costs and
                  expenses  incurred  by  the  Enforcing  Party,  and  from  the
                  remainder,  if any,  Wyeth-Ayerst  in the  event  Wyeth-Ayerst
                  shall be the  Enforcing  Party  shall  pay to  Neurocrine  (or
                  Neurocrine  shall retain in the event  Neurocrine shall be the
                  Enforcing  Party) an amount  equal to the  applicable  Royalty
                  rate set forth in Article Nine as applied to the  remainder as
                  though such  remainder  were added to Net Sales in the year in
                  which the  recovery  is made.  In the event the  Non-enforcing
                  Party  [***],  such award or  recovery  paid to the  Enforcing
                  Party shall  first be applied  toward  reimbursement  of legal
                  fees,   costs  and  expenses   incurred  by  the  Parties  (in
                  proportion to expenses incurred),  and the remainder,  if any,
                  shall be divided equally between the Parties.

         (c)      OHSU Licensed  Patent Rights.  Wyeth-Ayerst,  as  Neurocrine's
                  exclusive sublicensee of certain Patent Rights included in the
                  OHSU   Licensed   Patent   Rights  (as  defined  in  the  OHSU
                  Agreement),  shall have with respect to patent  enforcement of
                  Patent Rights exclusively licensed to Wyeth-Ayerst  hereunder,
                  the rights of an exclusive sublicensee under Article Eleven of
                  the OHSU Agreement.

         (d)      Neurocrine  Technology.  Neurocrine  shall have the sole right
                  but  not  the  obligation,  in its  own  name  and at its  own
                  expense,  to enforce  Patent  Rights  relating  to  Neurocrine
                  Technology (other than Neurocrine Inventions and OHSU Licensed
                  Patent Rights (as defined in the OHSU Agreement))  against any
                  Third Party  suspected of  infringing a claim of such a Patent
                  Right.

13.4     Infringement Defense.

         (a)      Wyeth-Ayerst.  Wyeth-Ayerst  shall have the right, but not the
                  obligation,  to defend and  control  any suit  against  any of
                  Wyeth-Ayerst,   Wyeth-Ayerst's   Affiliates  or  sublicensees,
                  alleging  infringement  of any  patent  or other  intellectual
                  property   right  of  a  Third   Party   arising  out  of  the
                  manufacture,  use,  sale,  offer to sell or  importation  of a
                  Collaboration   Product   by   Wyeth-Ayerst,    Wyeth-Ayerst's
                  Affiliates or sublicensees.  Wyeth-Ayerst shall be responsible
                  for the costs and expenses, including lawyer's fees and costs,
                  associated   with  any  suit  or  action,   Wyeth-Ayerst   and
                  Neurocrine  will consult with one another and cooperate in the
                  defense of any such action. If Wyeth-Ayerst finds it necessary
                  or desirable to join Neurocrine as a party to any such action,
                  Neurocrine  will  execute all papers and perform  such acts as
                  shall be reasonably required,  at Wyeth-Ayerst expense. In the
                  event the patent  claim of any Third  Party is held in a final
                  and  unappealable  order of a court to be valid and infringed,
                  or  if   Wyeth-Ayerst   enters  into  a  settlement   of  such
                  proceedings,  Wyeth-Ayerst  shall  pay the full  amount of any
                  damages  and/or  settlement  amounts due to such Third  Party,
                  provided, however, [***].

         (b)      OHSU Licensed  Patent Rights.  Wyeth-Ayerst,  as  Neurocrine's
                  exclusive sublicensee of certain Patent Rights included in the
                  OHSU   Licensed   Patent   Rights  (as  defined  in  the  OHSU
                  Agreement),  shall have with respect to  infringement  defense
                  relating  to  Licensed  Patent  Rights (as defined in the OHSU
                  Agreement) exclusively licensed to Wyeth-Ayerst hereunder, the
                  rights of an exclusive sublicensee under Article Eleven of the
                  OHSU Agreement.

13.5     Cooperation  Between  the  Parties.  The  Parties  recognize  that  the
         designation of a Compound as a Lead Compound or  Collaboration  Product
         may impact the designation of the Party  responsible for such invention
         under  this  Article  Thirteen.  The  Parties  anticipate  that  patent
         applications  may be filed on  Compounds  prior to  designation  of the
         Compound  as Lead  Compound  or  Collaboration  Product,  and  agree to
         co-operate in deciding how to allocate responsibilities and expenses in
         the event designation of a Compound as a Lead Compound or Collaboration
         Product  impacts  responsibilities  under  this  Article  Thirteen.  In
         addition,  the  Parties  agree  to  cooperate  with  each  other in the
         preparation, filing, prosecuting,  maintenance, defense and enforcement
         of  Patent  Rights  included  in  Collaboration   Technology   licensed
         hereunder. In any action taken in the prosecution of, or in the defense
         of  an  action  by a  Third  Party  related  to  patent  invalidity  or
         non-patentability   of  any  patent   application  or  patent  claiming
         Collaboration Technology licensed hereunder,  neither Party shall admit
         the  invalidity  or  non-patentability  of any Patent Right or take any
         other  action that may  diminish  Patent  Rights  within  Collaboration
         Technology  licensed  hereunder without the other Party's prior written
         consent. Wyeth-Ayerst agrees to provide Neurocrine with sufficient time
         to review,  comment and consult on all patent  applications and patents
         and  all  correspondence  to  and  from  the  various  patent  offices,
         including,  but not limited to, proposed  responses,  interferences and
         oppositions,  claiming  Neurocrine  Inventions,  Joint  Inventions  and
         Wyeth-Ayerst Inventions. The Parties agree to cooperate with each other
         and to use best  efforts  to  ensure  the  cooperation  of any of their
         respective personnel and licensee(s) or licensor(s) as might reasonably
         be requested in any such matters,  and shall sign any  necessary  legal
         papers and provide the prosecuting party with data or other information
         in support thereof. The Parties will confer on what action to take with
         respect  to  the  defense  of  infringement   proceedings  naming  both
         Wyeth-Ayerst  and  Neurocrine  or in  proceedings  to  enforce  patents
         claiming  Collaboration  Technology  licensed hereunder against a Third
         Party.  If the Parties cannot agree on the course of action to be taken
         in the filing,  prosecution,  maintenance,  or enforcement of any Joint
         Invention or  Wyeth-Ayerst  Invention,  Wyeth-Ayerst's  decisions shall
         control.  If the  Parties  cannot  agree on the  course of action to be
         taken  in the  filing,  prosecution,  maintenance,  or  enforcement  of
         Neurocrine Invention, Neurocrine's decisions shall control.


                                ARTICLE FOURTEEN
                                  MISCELLANEOUS

14.1     Disputes.  If the  Parties  are unable to resolve a dispute  among them
         informally,  Wyeth-Ayerst  and  Neurocrine,  by  written  notice to the
         other,  may have such dispute  referred to their  respective  executive
         officers   designated   for   attempted   resolution   by  good   faith
         negotiations:

         For Wyeth-Ayerst:       President of Wyeth-Ayerst 
                                 Research for development issues

                                 President Wyeth-Ayerst Global Pharmaceuticals 
                                 for commercialization issues


         For Neurocrine:         President and Chief Executive Officer

         Any such dispute shall be submitted to the  above-designated  executive
         officers  no later than  thirty  (30) days  following  such  request by
         either  Wyeth-Ayerst  or  Neurocrine.   In  the  event  the  designated
         executive  officers  are not able to resolve  any such  dispute  within
         [***]  after  submission  of the  dispute to such  executive  officers,
         Wyeth-Ayerst  or  Neurocrine,  as the case may be, may pursue what ever
         measures are legally  available to them to resolve  such  dispute.  All
         negotiations  pursuant  to  this  Section  14.1  shall  be  treated  as
         compromise and settlement negotiations.  Nothing said or disclosed, nor
         any document produced,  in the course of such negotiations which is not
         otherwise  independently  discoverable  shall be offered or received as
         evidence  or used  for  impeachment  or for any  other  purpose  in any
         current or future arbitration or litigation.

14.2     Assignment.  Neither this Agreement nor any interest hereunder shall be
         assignable  by either Party  without the prior  written  consent of the
         other Party,  except for  assignment  by operation of law in connection
         with a merger of a Party with or into another  Person.  This  Agreement
         shall be  binding  upon the  successors  and  permitted  assigns of the
         Parties  and the name of a Party  appearing  herein  shall be deemed to
         include the names of such Party's  successors and permitted  assigns to
         the extent  necessary  to carry out the intent of this  Agreement.  Any
         assignment not in accordance with this Section 14.2 shall be void.

14.3     Further Actions. Each Party agrees to execute,  acknowledge and deliver
         such  further  instruments,  and to do all such other  acts,  as may be
         necessary or  appropriate in order to carry out the purposes and intent
         of the Agreement.

14.4     Force Majeure.  No Party shall be liable to the other Party for loss or
         damages or shall have any right to  terminate  this  Agreement  for any
         default  or delay  attributable  to any  Force  Majeure,  if the  Party
         affected shall give prompt notice of any such cause to the other Party.
         The Party  giving such notice  shall  thereupon be excused from such of
         its obligations hereunder as it is thereby disabled from performing for
         so long as it is so disabled,  provided,  however,  that such  affected
         Party  commences  and  continues  to use  its  Commercially  Reasonable
         Efforts to cure such cause.

14.5     Correspondence and Notices.

         (a)      Ordinary Notices. Correspondence,  reports, documentation, and
                  any other  communication in writing between the Parties in the
                  course of ordinary  implementation  of this Agreement shall be
                  delivered  by hand,  sent by facsimile  transmission  (receipt
                  verified),  or by airmail to the employee or representative of
                  the  other  Party who is  designated  by such  other  Party to
                  receive such written communication.

         (b)      Extraordinary   Notices.   Extraordinary   notices  and  other
                  communications hereunder (including,  without limitation,  any
                  notice  of  force  majeure,  breach,  termination,  change  of
                  address,   exercise   of   rights  to   negotiate   additional
                  agreements,  etc.)  shall be in  writing  and  shall be deemed
                  given if delivered  personally  or by  facsimile  transmission
                  (receipt  verified),  mailed by registered  or certified  mail
                  (return  receipt  requested),  postage  prepaid,  or  sent  by
                  nationally  recognized express courier service, to the Parties
                  at the  following  addresses  (or at such other  address for a
                  Party as shall be specified by like notice, provided, however,
                  that notices of a change of address  shall be  effective  only
                  upon receipt thereof):

                  All correspondence to Wyeth-Ayerst shall be addressed as 
                  follows:

                        Wyeth-Ayerst Laboratories
                        555 East Lancaster Avenue
                        St. Davids, Pennsylvania  19087
                        Attn: Senior Vice President, Global Business Development
                        Fax:  (610) 688-9498

                                with a copy to:
                                American Home Products Corporation
                                5 Giralda Farms
                                Madison, New Jersey  07940
                                Attn:  Senior Vice President and General Counsel
                                Fax:  (973) 660-7156

                  All   correspondence  to  Neurocrine  shall  be  addressed  as
                  follows:

                        Neurocrine Biosciences, Inc.
                        10555 Science Park Road
                        San Diego, California 9211-1102
                        Attn: Director Product Licensing
                        Fax: 619-658-7602

                                with a copy to:
                                Neurocrine Biosciences, Inc.
                                10555 Science Park Road
                                San Diego, California 9211-1102
                                Attn:  Corporate Secretary
                                Fax: 619-658-7605

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

14.7     Waiver.  No  provision  of the  Agreement  shall be  waived by any act,
         omission or knowledge  of a Party or its agents or employees  except by
         an instrument in writing expressly waiving such provision and signed by
         a duly authorized officer of the waiving Party.


14.8     Counterparts.   This  Agreement  may  be  executed  in  any  number  of
         counterparts, each of which need not contain the signature of more than
         one Party but all such counterparts taken together shall constitute one
         and the same agreement.

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

14.10    Governing Law. This Agreement  shall be governed by and  interpreted in
         accordance with the substantive laws of the State of Delaware  (without
         regard to conflict of law  principles) and the Parties hereby submit to
         the  exclusive  jurisdiction  of the  federal  courts  of the  state of
         California.

14.11    Severability.  In the event that any clause or portion  thereof in this
         Agreement   is  for  any  reason  held  to  be   invalid,   illegal  or
         unenforceable,  the same  shall not  affect  any other  portion of this
         Agreement, as it is the intent of the Parties that this Agreement shall
         be construed in such fashion as to maintain its existence, validity and
         enforceability to the greatest extent possible. In any such event, this
         Agreement  shall be construed as if such clause of portion  thereof had
         never  been  contained  in this  Agreement,  and there  shall be deemed
         substituted  therefor such  provision as will most nearly carry out the
         intent of the Parties as  expressed  in this  Agreement  to the fullest
         extent  permitted  by  applicable  law  unless  doing so would have the
         effect of materially  altering the right and obligations of the Parties
         in which event this  Agreement  shall  terminate and all the rights and
         obligations  granted to the Parties  hereunder shall cease and be of no
         further force and effect.

14.12    Entire  Agreement  of  the  Parties.  This  Agreement  constitutes  and
         contains the complete,  final and exclusive understanding and agreement
         of  the  Parties  and  cancels  and   supersedes   any  and  all  prior
         negotiations, correspondence,  understandings and agreements including,
         without limitation, the Prior Agreement, whether oral or written, among
         the Parties respecting the subject matter hereof and thereof.

14.13    Independent  Contractors.  The  relationship  between  Wyeth-Ayerst and
         Neurocrine created by this Agreement is one of independent  contractors
         and neither Party shall have the power or authority to bind or obligate
         the other except as expressly set forth in this Agreement.

14.14    No Trademark  Rights.  Expect as otherwise  provided herein,  no right,
         express or implied,  is granted by this  Agreement to use in any manner
         the name "Neurocrine  Biosciences"  "Wyeth-Ayerst,"  or any other trade
         name or trademark of the other Party or its  Affiliates  in  connection
         with the performance of this Agreement.

14.15    Accrued  Rights;  Surviving  Obligations.  Unless  explicitly  provided
         otherwise in this Agreement, termination,  relinquishment or expiration
         of the  Agreement  for any  reason  shall be without  prejudice  to any
         rights  which  shall have  accrued to the benefit to any Party prior to
         such  termination,  relinquishment  or  expiration,  including  damages
         arising from any breach hereunder. Such termination,  relinquishment or
         expiration  shall not  relieve  any Party  from  obligations  which are
         expressly  indicated  to  survive  termination  or  expiration  of  the
         Agreement,  including,  without limitation, those obligations set forth
         in Articles Ten, Eleven and Twelve and Sections 5.8, 5.9, 9.4, 14.1 and
         14.5 hereof.

14.16    Export.  Notwithstanding anything to the contrary set forth herein, all
         obligations  of  Neurocrine  and  Wyeth-Ayerst  are  subject  to  prior
         compliance  with United States and foreign export  regulations and such
         other  United  States  and  foreign  laws  and  regulations  as  may be
         applicable  and  to  obtaining  all  necessary  approvals  required  by
         applicable agencies of the governments of the United States and foreign
         jurisdictions.  Neurocrine and  Wyeth-Ayerst  will  co-operate with one
         another and provide  assistance to one another as reasonably  necessary
         to obtain any required approvals.

         IN WITNESS WHEREOF, duly authorized representatives of the Parties have
duly executed this Agreement to be effective as of the Effective Date.

AMERICAN HOME PRODUCTS CORPORATION,            NEUROCRINE BIOSCIENCES, INC.
acting through its
WYETH-AYERST LABORATORIES DIVISION



By /s/ Egon Berg                               By: /s/ Gary Lyons
Name:  Egon Berg                               Name:   Gary Lyons
Title: Vice President &                        Title:  President & 
       Associate General Counsel                       Chief Executive Officer
                            
Date: 03/02/98                                 Date: 03/02/98



<PAGE>



                                    EXHIBIT A
                                  TRANSPORTERS
                                      [***]


                                    EXHIBIT B
                                  LEAD COMPOUND
                                      [***]


                                    EXHIBIT C
                                  PATENT RIGHTS
                                      [***]


                                    EXHIBIT D
                                 OHSU AGREEMENT
                                      [***]


                                    EXHIBIT E
                               THIRD PARTY PATENTS
                                      [***]


                                    EXHIBIT F
                          OTHER NEUROCRINE OBLIGATIONS
                                      [***]

 

                              EMPLOYMENT AGREEMENT

THIS AGREEMENT,  dated as of October 1, 1998, is made by and between  NEUROCRINE
BIOSCIENCES.  INC., a Delaware  corporation  (hereinafter  the  "Company"),  and
Margaret Valeur-Jensen (hereinafter "Executive").

                                 R E C I T A L S

         WHEREAS,  the Company and Executive wish to set forth in this Agreement
the terms and conditions  under which Executive is to be employed by the Company
on and after the date hereof; and

         NOW,  THEREFORE,  the Company and Executive,  in  consideration  of the
mutual promises set forth herein, agree as follows:

                                    ARTICLE 1

                                TERM OF AGREEMENT

         1.1 Commencement Date. Executive's fulltime employment with the Company
under this Agreement shall commence as of January 4, 1999 ("Commencement  Date")
and this  Agreement  shall  expire  after a period of three  (3) years  from the
Commencement  Date,  unless  terminated  earlier  pursuant  to  Article 6. It is
understood the Executive  shall be available to the Company on a part-time basis
during the period October 1, 1998 to December 31, 1998.

         1.2 Renewal. The term of this Agreement shall be automatically  renewed
for  successive,  additional  three (3) year terms unless either party  delivers
written  notice to the other at least  ninety (90) days prior to the  expiration
date of this  Agreement of an intention to terminate  this Agreement or to renew
it for a term of less than  three  (3) years but not less than (1) year.  If the
term of this Agreement is renewed for a term of less than three (3) years,  then
thereafter  the  term of this  Agreement  shall  be  automatically  renewed  for
successive,  additional  identical  terms unless either party delivers a written
notice to the other at least ninety (90) days prior to a terminate  date of this
Agreement  of an  intention  to  terminate  this  Agreement or to renew it for a
different term of not less than one (1) year.

                                    ARTICLE 2

                                EMPLOYMENT DUTIES

         2.1  Title/Responsibilities.  Executive hereby accepts  employment with
the Company  pursuant to the terms and conditions  hereof.  Executive  agrees to
serve the  Company in the  position  of Vice  President  - General  Counsel  and
Corporate  Secretary.  Executive  shall have the powers and duties  commensurate
with such position,  including but not limited to hiring personnel  necessary to
carry out the  responsibilities  for such  position  as set forth in the  annual
business plan approved by the Board of Directors.

         2.2 Full Time  Attention.  Executive  shall devote her best efforts and
her  full  business  time  and  attention  to the  performance  of the  services
customarily  incident to such office and to such other services as the President
or Board may reasonably request.

         2.3 Other  Activities.  Except  upon the prior  written  consent of the
President & Chief  Executive  Officer,  Executive shall not during the period of
employment  engage,  directly  or  indirectly,  in any other  business  activity
(whether or not pursued for pecuniary  advantage)  that is or may be competitive
with, or that might place her in a competing  position to that of the Company or
any other  corporation  or entity  that  directly  or  indirectly  controls,  is
controlled  by, or is under  common  control  with the Company  (an  "Affiliated
Company"),  provided  that  Executive  may own  less  than  two  percent  of the
outstanding securities of any such publicly traded competing corporation.  It is
understood Executive will enter into a Consulting Agreement with the Executive's
former employer, Amgen, Inc. Prior to execution of such Agreement, the Executive
must receive  approval from the President & Chief  Executive  Officer,  approval
which will not be unreasonably withheld.


                                    ARTICLE 3

                                  COMPENSATION

         3.1 Base  Salary.  Executive  shall  receive a Base Salary at an annual
rate of two hundred twelve thousand dollars ($212,000),  payable semi-monthly in
equal  installments in accordance with the Company's  normal payroll  practices.
The Company's Board of Directors shall provide Executive with annual performance
reviews,  and, thereafter,  Executive shall be entitled to such increase in Base
Salary as the Board of  Directors  may from time to time  establish  in its sole
discretion.  During the period  October 1, 1998 to December 31, 1998,  Executive
shall receive a Salary of $5,000 for services  performed for or on behalf of the
Company on the Company's premises.


         3.2 Incentive  Bonus. In addition to any other bonus Executive shall be
awarded by the Company's  Board of Directors,  the Company shall pay Executive a
bonus payment of up to fifty  thousand  dollars  ($50,000)  annually  based upon
achievement  by the Company  against six to eight impact  goals  approved by the
Board of  Directors  annually.  Such goals  shall be set forth in writing by the
Board within ninety (90) days after the start of the Company's fiscal year and a
copy shall be delivered to Executive  within fifteen (15) days  thereafter.  The
Board of  Directors  shall,  in their sole  discretion,  determine  whether such
impact goals have been obtained.

         3.3 Equity.  The Executive will receive a nonqualified stock option to
purchase one hundred fifteen  thousand  (115,000) shares of the Company's common
stock with an exercise  price of $5.0625 per share,  representing  the Company's
market  price at the time of Board  approval.  Such  option  shall  vest  over a
four-year  period with 25% of such  vesting  occurring  on December 31, 1999 and
1/48 per month  thereafter  in accordance  with the terms of the Company's  1992
Incentive Stock Incentive Plan, as amended.

         3.3  Withholdings.  All  compensation and benefits payable to Executive
hereunder and the Agreement  shall be subject to all federal,  state,  local and
other withholdings and similar taxes and payments required by applicable law.

                                    ARTICLE 4

                     EXPENSE ALLOWANCES AND FRINGE BENEFITS

         4.1 Vacation.  Executive  shall be entitled to the greater of three (3)
weeks of annual paid  vacation  or the amount of annual  paid  vacation to which
Executive may become  entitled under the terms of Company's  vacation policy for
employees during the term of this Agreement.

         4.2 Benefits. During the term of this Agreement, the Company shall also
provide Executive with the usual health insurance benefits it generally provides
to its other  senior  management  employees.  As Executive  becomes  eligible in
accordance with criteria to be adopted by the Company, the Company shall provide
Executive  with the right to  participate  in and to receive  benefit from life,
accident, disability, medical, pension, bonus, stock, profit-sharing and savings
plans and similar benefits made available  generally to employees of the Company
as such plans and benefits may be adopted by the Company.  The amount and extent
of benefits to which  Executive  is entitled  shall be governed by the  specific
benefit plan as it may be amended from time to time.

         4.3 Relocation. The Company will pay for reasonable relocation expenses
consisting  of (i) out of pocket  expenses  directly  related  to  selling  your
existing home, including customary real estate commissions and associated costs;
(ii) reasonable house hunting expenses,  temporary living expenses through March
1999 and duplicate  mortgage  payments,  if required,  through June 1999;  (iii)
customary closing costs and fees, including up to one and one half points (1.5%)
of the mortgage  financing  amount  related to the purchase of a new home;  (iv)
reasonable  and  customary  moving  expenses  of  household  goods and  personal
property  (including  temporary  storage) to San Diego, CA; (v) up to $10,000 in
other miscellaneous documented expenses.  Relocation costs associated with items
(i) through (iv) above will be tax equalized.

         4.4 Loss on Sale:  In the event  that you sell your home to a bona fide
purchaser  in good  faith  at a gross  price  before  deducting  direct  selling
expenses or commissions (the "Sales Price"),  less than your purchase price plus
the cost of improvements (the "Purchase  Price"),  the Company will lend you the
lesser of the difference  between the Sales Price and Purchase Price or $50,000,
with such loan to be evidenced by a promissory note due and payable in the event
of (a) the sale of stock  options by the Employee (to the extent of the proceeds
received  by  Employee  in  such  sale),  or  (b)  ninety  (90)  days  following
termination  of your  employment  with the Company or (c) sale of your San Diego
house. Fifty percent (50%) of the total amount of such loan shall be forgiven by
the Company over a four (4) year period in four (4) equal  installments  on each
of the  first  through  fourth  anniversary  dates of the  commencement  of your
full-time  employment with the Company,  provided that you are still employed by
the Company on such date.

                                    ARTICLE 5

                                 CONFIDENTIALITY

         5.1 Proprietary Information.  Executive represents and warrants that he
has  previously  executed and  delivered to the Company the  Company's  standard
Proprietary  Information  and  Inventions  Agreement in form  acceptable  to the
Company's counsel.

         5.2 Return of Property. All documents,  records,  apparatus,  equipment
and other  physical  property  which is furnished to or obtained by Executive in
the  course of her  employment  with the  Company  shall be and  remain the sole
property of the Company.  Executive  agrees that,  upon the  termination  of her
employment,  he shall  return all such  property  (whether or not it pertains to
Proprietary Information as defined in the Proprietary Information and Inventions
Agreement), and agrees not to make or retain copies,  reproductions or summaries
of any such property.

                                    ARTICLE 6

                                   TERMINATION

         6.1 By Death.  The period of employment  shall terminate  automatically
upon the death of Executive. In such event, the Company shall pay to Executive's
beneficiaries  or her estate,  as the case may be, any accrued Base Salary,  any
bonus compensation to the extent earned, any vested deferred compensation (other
than  pension  plan  or  profit-sharing  plan  benefits  which  will  be paid in
accordance  with the  applicable  plan),  any  benefits  under  any plans of the
Company in which  Executive is a participant  to the full extent of  Executive's
rights under such plans, any accrued  vacation pay and any appropriate  business
expenses incurred by Executive in connection with her duties  hereunder,  all to
the  date of  termination  (collectively  Accrued  Compensation),  but no  other
compensation  or  reimbursement  of any  kind,  including,  without  limitation,
severance  compensation,  and thereafter,  the Company's  obligations  hereunder
shall terminate.

         6.2 By Disability.  If Executive is prevented from properly  performing
her duties hereunder by reason of any physical or mental incapacity for a period
of 120 consecutive days, or for 180 days in the aggregate in any 365-day period,
then, to the extent  permitted by law, the Company may terminate the  employment
of Executive at such time. In such event, the Company shall pay to Executive all
Accrued  Compensation,  and shall  continue to pay to Executive  the Base Salary
until such time (but not more than 90 days following termination),  as Executive
shall  become  entitled  to  receive  disability  insurance  payments  under the
disability insurance policy maintained by the Company, but no other compensation
or  reimbursement  of  any  kind,   including  without   limitation,   severance
compensation,   and  thereafter  the  Company's   obligations   hereunder  shall
terminate.  Nothing in this Section  shall affect  Executive's  rights under any
disability plan in which he is a participant.

         6.3 By Company for Cause.  The Company may  terminate  the  Executive's
employment for Cause (as defined  below)  without  liability at any time with or
without advance notice to Executive. The Company shall pay Executive all Accrued
Compensation,  but no other compensation or reimbursement of any kind, including
without  limitation,   severance  compensation,  and  thereafter  the  Company's
obligations  hereunder shall terminate.  Termination shall be for "Cause" in the
event of the occurrence of any of the following:  (a) any intentional  action or
intentional  failure to act by Executive which was performed in bad faith and to
the material detriment of the Company;  (b) Executive  intentionally  refuses or
intentionally fails to act in accordance with any lawful and proper direction or
order of the Board; (c) Executive  willfully and habitually  neglects the duties
of employment;  or (d) Executive is convicted of a felony crime  involving moral
turpitude, provided that in the event that an of the foregoing events is capable
of being cured, the Company shall provide written notice to Executive describing
the nature of such event and Executive  shall  thereafter have ten (10) business
days to cure such event.

         6.4  Termination  Without Cause. At any time, the Company may terminate
the employment of Executive without liability other than as set forth below, for
any reason not  specified  in Section  6.3  above,  by giving  thirty  (30) days
advance  written  notice  to  Executive.  If the  Company  elects  to  terminate
Executive  pursuant to this Section 6.4, (a) the Company  shall pay to Executive
all Accrued  Compensation  (b) the Company shall continue to pay to Executive as
provided herein Executive's Base Salary over the period equal to nine (9) months
from the date of such termination as severance compensation,  (c) if Executive's
employment  terminates  in the second half of the  Company's  fiscal  year,  the
Company  shall make a lump sum payment to  Executive in an amount equal to a pro
rata portion of the Executive's annual actual cash incentive bonus for Company's
fiscal year preceding the year of  termination  based on the number of completed
months of Executive's employment in the fiscal year divided by nine (9); (d) the
vesting of all outstanding  stock options held by Executive shall be accelerated
so that the amount of shares vested under such option shall equal that number of
shares  which would have been vested if the  Executive  had  continued to render
services  to the Company for nine (9)  continuous  months  after the date of her
termination  of  employment;  and (e) the Company  shall pay all costs which the
Company would otherwise have incurred to maintain all of Executive's  health and
welfare, and retirement benefits (either on the same or substantially equivalent
terms and  conditions) if the Executive had continued to render  services to the
Company for nine (9)  continuous  months  after the date of her  termination  of
employment.  The Company shall have no further  obligations  to Executive  other
than those set forth in the preceding sentence. During the period when such Base
Salary  severance  compensation is being paid to Executive,  Executive shall not
(i) engage, directly or indirectly,  in providing services to any other business
program or project that is competitive  to a program or project being  conducted
by the  Company  or any  Affiliated  Company  at the  time  of  such  employment
termination  (provided  that Executive may own less than two percent (2%) of the
outstanding  securities  of any  publicly  traded  corporation),  or (ii)  hire,
solicit,  or attempt  to solicit on behalf of himself or any other  party or any
employee or exclusive  consultant of the Company. If the Company terminates this
Agreement or the employment of Executive with the Company other than pursuant to
Section 6.1, 6.2 or 6.3, then this section 6.4 shall apply.

         6.5 Constructive Termination A Constructive Termination shall be deemed
to be a termination of employment of Executive without cause pursuant to Section
6.4 For Purposes of this Agreement, a "Constructive  Termination" means that the
Executive  voluntarily  terminates her employment after any of the following are
undertaken without Executive's express written consent:

                  (a)  the   assignment   to   Executive   of  any   duties   or
         responsibilities  which result in any  diminution or adverse  change of
         Executive's  position,  status or circumstances  of employment;  or any
         removal of Executive  from or any failure to re-elect  Executive to any
         of such  positions,  except in connection  with the  termination of her
         employment for death, disability,  retirement, fraud, misappropriation,
         embezzlement (or any other occurrence which  constitutes  "Cause" under
         section  6.3) or any  other  voluntary  termination  of  employment  by
         Executive other than a Constructive Termination;

                  (b) a  reduction  by the  Company in  Executive's  annual Base
         Salary by greater than five percent (5%);

                  (c) a  relocation  of  Executive  or the  Company's  principal
         executive  offices if Executive's  principal office is at such offices,
         to a location  more than forty  (40) miles from the  location  at which
         Executive is then  performing her duties,  except for an opportunity to
         relocate which is accepted by Executive in writing;

                  (d) any  material  breach by the Company of any  provision  of
         this Agreement; or

                  (e) any  failure by the  Company to obtain the  assumption  of
         this Agreement by any successor or assign of the Company.

         6.6  Termination  Following  Change  in  Control  In  the  event  of  a
non-renewal  of this  Agreement,  a termination  without Cause or a Constructive
Termination within eighteen (18) months following a Change in Control, Executive
shall receive the same benefits  package as Executive would have received upon a
termination  without Cause (except that the payment of Base Salary shall be made
in the form of a lump sum) and in addition, the vesting of all outstanding stock
options  held by  Executive  shall  be  accelerated  so  that  the  options  are
immediately exercisable in full.

         6.7 Change in Control.  For  purposes of this  Agreement,  a "Change in
Control"  shall have  occurred  if at any time  during  the term of  Executive's
employment hereunder, any of the following events shall occur:

                  (a) The Company is merged,  or  consolidated.  or  reorganized
         into or with another corporation or other legal person, and as a result
         of such merger,  consolidation or  reorganization  less than 50% of the
         combined  voting  power  of the  then-outstanding  securities  of  such
         corporation or person  immediately  after such  transaction are held in
         the  aggregate  by the  holders  of voting  securities  of the  Company
         immediately prior to such transaction;

                  (b) The Company sells all or  substantially  all of its assets
         or any other  corporation  or other legal person and  thereafter,  less
         than 50% of the combined  voting power of the  then-outstanding  voting
         securities  of the  acquiring  or  consolidated  entity are held in the
         aggregate  by  the  holders  of  voting   securities   of  the  Company
         immediately prior to such sale;

                  (c) There is a report  filed after the date of this  Agreement
         on Schedule 13 D or schedule 14 D-1 (or any successor schedule, form or
         report), each as promulgated pursuant to the Securities Exchange Act of
         l934 (the  "Exchange  Act")  disclosing  that any  person  (as the term
         "person"  is  used in  Section  13(d)(3)  or  Section  14(d)(2)  of the
         exchange Act) has become the beneficial  owner (as the term  beneficial
         owner is defined under Rule 13d-3 or any  successor  rule or regulation
         promulgated  under the Exchange  Act)  representing  50% or more of the
         combined voting power of the then-outstanding  voting securities of the
         Company;

                  (d) The Company  shall file a report or proxy  statement  with
         the  Securities  and Exchange  Commission  pursuant to the Exchange Act
         disclosing in response to item 1 of Form 8-X thereunder or Item 5(f) of
         Schedule 14 A thereunder (or any successor schedule,  form or report or
         item therein) that the change in control of the Company has or may have
         occurred  or  will  or  may  occur  in  the  future   pursuant  to  any
         then-existing contract or transaction; or

                  (e) During any period of two  consecutive  years,  individuals
         who at the beginning of any such period constitute the directors of the
         Company cease for any reason to constitute at least a majority  thereof
         unless the election to the  nomination  for  election by the  Company's
         shareholders  of each director of the Company first elected during such
         period was approved by a vote of at least  two-thirds  of the directors
         of the Company  then still in office who were  directors of the Company
         at the beginning of such period.

         6.8 Termination by Executive.  At any time, Executive may terminate her
employment by giving thirty (30) days advance written notice to the Company. The
Company shall pay Executive all Accrued Compensation,  but no other compensation
or  reimbursement  of  any  kind,   including  without   limitation,   severance
compensation,   and  thereafter  the  Company's   obligations   hereunder  shall
terminate.

         6.9  Mitigation  Except  as  otherwise  specifically  provided  herein,
Executive  shall not be required to mitigate the amount of any payment  provided
under this Agreement by seeking other employment or  self-employment,  nor shall
the amount of any payment  provided  for under this  Agreement be reduced by any
compensation  earned by Executive as a result of employment by another  employer
or  through  self-employment  or  by  retirement  benefits  after  the  date  of
Executive's termination of employment from the Company.

         6.10 Coordination If upon termination of employment,  Executive becomes
entitled to rights under other plans,  contracts or arrangements entered into by
the Company, this Agreement shall be coordinated with such other arrangements so
that  Executive's  rights under this  Agreement  are not  reduced,  and that any
payments  under  this  Agreement  offset the same  types of  payments  otherwise
provided under such other arrangements, but do not otherwise reduce any payments
or benefits under such other arrangements to which Executive becomes entitled.

                                    ARTICLE 7

                               GENERAL PROVISIONS

         7.1  Governing  law. The  validity,  interpretation,  construction  and
performance of this Agreement and the rights of the parties  thereunder shall be
interpreted and enforced under California law without reference to principles of
conflicts of laws.  The parties  expressly  agree that inasmuch as the Company's
headquarters  and principal  place of business are located in California,  it is
appropriate that California law govern this Agreement.

         7.2 Assignment; Successors Binding Agreement.

                  7.2.1  Executive  may  not  assign,  pledge  or  encumber  her
         interest in this Agreement or any part thereof.

                  7.2.2 The Company will require any successor  (whether  direct
         or indirect, by purchase, merger, consolidation or otherwise) to all or
         substantially  all of the business  and/or  assets of the  Company,  by
         operation  of law or by  agreement  in form  and  substance  reasonably
         satisfactory  to  Executive,  to  assume  and  agree  to  perform  this
         Agreement  in the same  manner and to the same  extent that the Company
         would be required to perform it if no such succession had taken place.

                  7.2.3  This  Agreement  shall  inure to the  benefit of and be
         enforceable   by   Executive's   personal  or  legal   representatives,
         executors, administrators, successors, heirs, distributee, devisees and
         legatees.  If  Executive  should  die while any  amount is at such time
         payable to her hereunder,  all such amounts,  unless otherwise provided
         herein, shall be paid in accordance with the terms of this Agreement to
         Executive's devisee,  legates or other designee or, if there be no such
         designee, to her estate.

         7.3  Certain  Reduction  of  Payments  In the event that any payment or
benefit  received or to be  received by  Executive  under this  Agreement  would
result in all or a portion  of such  payment  to be subject to the excise tax on
"golden  parachute  payments" under Section 4999 of the Internal Revenue Code of
1986, as amended (the "Code"),  then Executive's payment shall be either (a) the
full  payment or (b) such lesser  amount which would result in no portion of the
payment being subject to excise tax under Section 4999 of the Code, whichever of
the foregoing  amounts,  taking into account the applicable  Federal,  state and
local employment taxes, income taxes, and the excise tax imposed by Section 4999
of the Code,  results in the receipt by Executive on an after-tax  basis, of the
greatest amount of the payment  notwithstanding  that all or some portion of the
payment may be taxable under Section 4999 of the Code.

         7.4 Notice.  For the purposes of this Agreement,  notices and all other
communications  provided for in this Agreement  shall be in writing and shall be
deemed  to have been duly  given  when  delivered  or  mailed  by  certified  or
registered mail,  return receipt  requested,  postage prepaid,  addressed to the
respective  addresses  set forth below or to such other  address as either party
may have furnished to the other in writing in accordance  herewith,  except that
notice of change of address shall be effective only upon receipt.

         To the Company:

         Neurocrine Biosciences, Inc.
         10555 Science Center Drive
         San Diego, CA 92121
         Attn.: President & Chief Executive Officer

     To Executive:
         Ms. Margaret Valeur-Jensen
         4507 South Lane
         Del Mar, CA  92014


         7.5  Modification;  Waiver;  Entire  Agreement.  No  provisions of this
Agreement may be modified, waived or discharged unless such waiver, modification
or discharge is agreed to in writing signed by Executive and such officer as may
be  specifically  designated  by the Board of the  Company.  No waiver by either
party  hereto at any time of any  breach by the  other  party of, or  compliance
with, any condition or provision of this Agreement to be performed by such other
party shall be deemed a waiver of similar or dissimilar provisions or conditions
at the same or any prior or subsequent  time. No agreements or  representations,
oral or otherwise, express or implied, with respect to the subject matter hereof
have  been  made by  either  party  which  are not  expressly  set forth in this
Agreement.

         7.6 Validity.  The invalidity or  unenforceability  of any provision of
this  Agreement  shall not affect the  validity or  enforceability  of any other
provision of this Agreement, which shall remain in full force and effect.

         7.7  Controlling  Document.  Except to the extent  described in Section
6.l0,  in case of  conflict  between  any of the  terms  and  condition  of this
Agreement and the document  herein referred to, the terms and conditions of this
Agreement shall control.

         7.8 Executive  Acknowledgment.  Executive  acknowledges (a) that he has
consulted with or has had the opportunity to consult with independent counsel of
her own choice  concerning this Agreement,  and has been advised to do so by the
Company, and (b) that he has read and understands the Agreement,  is fully aware
of its legal effect, and has entered into it freely based on her own judgment.

         7.9 Remedies

                  7.9.1 Injunctive  Relief.  The parties agree that the services
         to be rendered by Executive  hereunder  are of a unique nature and that
         in the event of any breach or threatened breach of any of the covenants
         contained  herein,  the damage or imminent  damage to the value and the
         goodwill of the Company's  business will be  irreparable  and extremely
         difficult  to  estimate,  making  any  remedy  at  law  or  in  damages
         inadequate.  Accordingly,  the parties  agree that the Company shall be
         entitled to  injunctive  relief  against  Executive in the event of any
         breach or threatened  breach of any such  provisions  by Executive,  in
         addition  to any  other  relief  (including  damage)  available  to the
         Company under this Agreement or under law.

                  7.9.2 Exclusive.  Both parties agree that the remedy specified
         in Section  7.9.1 above is not  exclusive  of any other  remedy for the
         breach by Executive of the terms hereof.

         7.10  Counterparts.  This  Agreement  may be  executed  in one or  more
counterparts,  all of which taken  together  shall  constitute  one and the same
Agreement.

         7.11  Prevailing  Party  Expenses.  In the  event  that any  action  or
proceeding is commenced to enforce the  provisions of the  Agreement,  the court
adjudicating  such action or proceeding  shall award to the prevailing party all
costs and  expenses  thereof,  including,  but not  limited  to, all  reasonable
attorneys' fees, court costs, and all other related expenses.

Executed by the parties as of the day and year first above written.

EXECUTIVE                                   NEUROCRINE BIOSCIENCES, INC

By:  /s/Margaret Valeur-Jensen              By: /s/Gary A. Lyons
     Margaret Valeur-Jensen                 Gary A. Lyons
                                            President & Chief Executive Officer


                              EMPLOYMENT AGREEMENT

THIS AGREEMENT,  dated as of January 1, 1998, is made by and between  NEUROCRINE
BIOSCIENCES. INC., a Delaware corporation (hereinafter the "Company"), and BRUCE
CAMPBELL, Ph.D. (hereinafter "Executive").

                                 R E C I T A L S

         WHEREAS,  the Company and Executive wish to set forth in this Agreement
the terms and conditions  under which Executive is to be employed by the Company
on and after the date hereof; and

         NOW,  THEREFORE,  the Company and Executive,  in  consideration  of the
mutual promises set forth herein, agree as follows:

                                    ARTICLE 1

                                TERM OF AGREEMENT

         1.1 Commencement Date. Executive's fulltime employment with the Company
under this Agreement shall commence as of January 1, 1998 ("Commencement  Date")
and this  Agreement  shall  expire  after a period of three  (3) years  from the
Commencement Date, unless terminated earlier pursuant to Article 6.

         1.2 Renewal. The term of this Agreement shall be automatically  renewed
for  successive,  additional  three (3) year terms unless either party  delivers
written  notice to the other at least  ninety (90) days prior to the  expiration
date of this  Agreement of an intention to terminate  this Agreement or to renew
it for a term of less than  three  (3) years but not less than (1) year.  If the
term of this Agreement is renewed for a term of less than three (3) years,  then
thereafter  the  term of this  Agreement  shall  be  automatically  renewed  for
successive,  additional  identical  terms unless either party delivers a written
notice to the other at least ninety (90) days prior to a terminate  date of this
Agreement  of an  intention  to  terminate  this  Agreement or to renew it for a
different term of not less than one (1) year.

                                    ARTICLE 2

                                EMPLOYMENT DUTIES

         2.1  Title/Responsibilities.  Executive hereby accepts  employment with
the Company  pursuant to the terms and conditions  hereof.  Executive  agrees to
serve the Company in the  position of Vice  President -  Development.  Executive
shall have the powers and duties commensurate with such position,  including but
not limited to hiring personnel necessary to carry out the  responsibilities for
such position as set forth in the annual  business plan approved by the Board of
Directors.

         2.2 Full Time  Attention.  Executive  shall devote his best efforts and
his  full  business  time  and  attention  to the  performance  of the  services
customarily  incident to such office and to such other services as the President
or Board may reasonably request.

         2.3 Other  Activities.  Except  upon the prior  written  consent of the
President & Chief  Executive  Officer,  Executive shall not during the period of
employment  engage,  directly  or  indirectly,  in any other  business  activity
(whether or not pursued for pecuniary  advantage)  that is or may be competitive
with, or that might place him in a competing  position to that of the Company or
any other  corporation  or entity  that  directly  or  indirectly  controls,  is
controlled  by, or is under  common  control  with the Company  (an  "Affiliated
Company"),  provided  that  Executive  may own less than two percent (2%) of the
outstanding securities of any such publicly traded competing corporation.


                                    ARTICLE 3

                                  COMPENSATION

         3.1 Base  Salary.  Executive  shall  receive a Base Salary at an annual
rate of two hundred thousand dollars  (200,000),  payable  semi-monthly in equal
installments  in accordance  with the Company's  normal payroll  practices.  The
Company's  Board of Directors  shall provide  Executive with annual  performance
reviews,  and, thereafter,  Executive shall be entitled to such increase in Base
Salary as the Board of  Directors  may from time to time  establish  in its sole
discretion. In addition, upon signing this Agreement,  Executive will receive an
initial bonus of twenty thousand dollars ($20,000).

         3.2 Incentive  Bonus. In addition to any other bonus Executive shall be
awarded by the Company's  Board of Directors,  the Company shall pay Executive a
bonus payment of up to fifty  thousand  dollars  ($50,000)  annually  based upon
achievement  by the Company  against six to eight impact  goals  approved by the
Board of  Directors  annually.  Such goals  shall be set forth in writing by the
Board within ninety (90) days after the start of the Company's fiscal year and a
copy shall be delivered to Executive  within fifteen (15) days  thereafter.  The
Board of  Directors  shall,  in their sole  discretion,  determine  whether such
impact goals have been obtained.

         3.3  Equity.   Executive  has  previously  entered  into  a  Consulting
Agreement  ("Consulting  Agreement")  with the Company dated  September 9, 1997.
Pursuant to the Consulting  Agreement,  Executive has received a stock option to
purchase one hundred  twenty-five  thousand  (125,000)  shares of the  Company's
common stock with an exercise price of six dollars and ninety-one  cents ($6.91)
per  share,  representing  the  Company's  market  price  at the  time of  Board
approval.  Such option shall continue to vest in accordance  with the Consulting
Agreement and in accordance with the terms of the Company's 1992 Incentive Stock
Incentive  Plan, as amended.  Upon execution of this  Agreement,  the Consulting
Agreement will terminate.

         3.3  Withholdings.  All  compensation and benefits payable to Executive
hereunder and the Agreement  shall be subject to all federal,  state,  local and
other withholdings and similar taxes and payments required by applicable law.

                                    ARTICLE 4

                     EXPENSE ALLOWANCES AND FRINGE BENEFITS

         4.1 Vacation.  Executive  shall be entitled to the greater of three (3)
weeks of annual paid  vacation  or the amount of annual  paid  vacation to which
Executive may become  entitled under the terms of Company's  vacation policy for
employees during the term of this Agreement.

         4.2 Benefits. During the term of this Agreement, the Company shall also
provide Executive with the usual health insurance benefits it generally provides
to its other  senior  management  employees.  As Executive  becomes  eligible in
accordance with criteria to be adopted by the Company, the Company shall provide
Executive  with the right to  participate  in and to receive  benefit from life,
accident, disability, medical, pension, bonus, stock, profit-sharing and savings
plans and similar benefits made available  generally to employees of the Company
as such plans and benefits may be adopted by the Company.  The amount and extent
of benefits to which  Executive  is entitled  shall be governed by the  specific
benefit plan as it may be amended from time to time.

         4.3  Relocation to San Diego, CA. The Executive shall be reimbursed for
reasonable  and customary  relocation  expenses as follows:

     (a)  out of pocket expenses related to selling Executive's existing home in
          the United Kingdom, including customary real estate commissions not to
          exceed one percent (1%) of selling price and associated costs;

     (b)  reasonable  house hunting and up to sixty (60) days  temporary  living
          expenses;

     (c)  customary  closing  costs  associated  with the purchase of a new home
          including  up to one and  one-half  points of the  mortgage  financing
          amount related to the purchase of a new home;

     (d)  reasonable  and  customary  moving  expenses  of  household  goods and
          personal  property  (including  temporary  storage of up the three (3)
          months) to San Diego, CA;

     (e)  up to twenty thousand dollars ($20,000) for  miscellaneous  documented
          relocation expenses,  payable upon the purchase or rental of a home in
          San Diego, CA.

The Company will reimburse the Executive for the incremental increase in federal
and state income taxes  associated with the payment of expenses  associated with
items (a) through (d) above.  In  addition,  the Company  will retain at Company
expense,  for the benefit of Executive,  a tax  specialist  who will provide tax
guidance associated with the Executive's relocation to the United States for the
three tax periods  immediately  following  Executive's  relocation to the United
States.

         4.4 Relocation  Loan: In connection  with the purchase of a home in the
San Diego  area,  the  Company  will  provide to  Executive  a loan of up to two
hundred and fifty thousand dollars  ($250,000)  representing the excess over the
purchase  price  of a home in San  Diego  over  five  hundred  thousand  dollars
($500,000). Such loan will, at the option of the Company, be secured by a second
mortgage deed on the home purchased by Executive.  The principal  balance of the
loan will bear  interest  at a rate of one  percent  per annum  (1.0%  p.a.) and
principal  and  interest  will be payable upon the first to occur of (i) sale of
the home, (ii) six (6) months following voluntary or involuntary  termination of
Executive's employment with the Company,  (iii) the exercise,  pledge or sale of
all or part of the  stock  options  granted  by  Company  to  Executive  or (iv)
December 31, 1999.

         4.5 Relocation to the Untied Kingdom:  Upon  termination of Executive's
employment  with the Company,  the Company will  reimburse  Executive  for costs
associated with  relocation back to the United Kingdom  including (i) the lesser
of  customary  closing  costs and fees (not to exceed  six  percent  (6%) of the
selling  price)  related to the sale by Executive of the first home in San Diego
owned by Executive during the term of this Agreement or customary  closing costs
and fees (not to exceed six percent  (6%) of the selling  price)  related to the
sale of  Executive's  home in San  Diego  on the  date  of  termination  of this
Agreement, (ii) documented reasonable and customary moving expenses of household
goods and personal  property not to exceed in the aggregate ten thousand dollars
($10,000).  The foregoing provision shall not apply in the event (i) at the time
of relocation,  Executive has accepted  employment with another company or it is
Executive's intention to do so within a period of six (6) months, (ii) Executive
has not completed  four (4) full years of employment at the Company  (other than
by reason of the failure of the Company to renew the term of this  Agreement) or
(iii)  termination  of Executive's  employment  with the Company is for Cause as
defined in paragraph 6.3 below.

         4.6  Other  Relocation  Expenses.  The  Company  will  provide  to  the
Executive's wife, mother and  mother-in-law,  one round trip coach ticket to and
from San Diego and London. The Company will arrange for a Business Class upgrade
for these tickets.

         4.7 Business Expense Reimbursement.  During the term of this Agreement,
Executive shall be entitled to receive proper  reimbursement  for all reasonable
out-of-pocket  expenses  incurred by him (in  accordance  with the  policies and
procedures  established  by the Company for its senior  executive  officers)  in
performing  services  hereunder.  Executive  agrees to  furnish  to the  Company
adequate  records  and other  documentary  evidence  of such  expense  for which
Executive seeks  reimbursement.  Such expenses shall be reimbursed and accounted
for under the policies and  procedure  established  by the Company and the Audit
Committee of the Board of Directors.

                                    ARTICLE 5

                                 CONFIDENTIALITY

         5.1 Proprietary Information.  Executive represents and warrants that he
has  previously  executed and  delivered to the Company the  Company's  standard
Proprietary  Information  and  Inventions  Agreement in form  acceptable  to the
Company's counsel.

         5.2 Return of Property. All documents,  records,  apparatus,  equipment
and other  physical  property  which is furnished to or obtained by Executive in
the  course of his  employment  with the  Company  shall be and  remain the sole
property of the Company.  Executive  agrees that,  upon the  termination  of his
employment,  he shall  return all such  property  (whether or not it pertains to
Proprietary Information as defined in the Proprietary Information and Inventions
Agreement), and agrees not to make or retain copies,  reproductions or summaries
of any such property.

                                    ARTICLE 6

                                   TERMINATION

         6.1 By Death.  The period of employment  shall terminate  automatically
upon the death of Executive. In such event, the Company shall pay to Executive's
beneficiaries  or his estate,  as the case may be, any accrued Base Salary,  any
bonus compensation to the extent earned, any vested deferred compensation (other
than  pension  plan  or  profit-sharing  plan  benefits  which  will  be paid in
accordance  with the  applicable  plan),  any  benefits  under  any plans of the
Company in which  Executive is a participant  to the full extent of  Executive's
rights under such plans, any accrued  vacation pay and any appropriate  business
expenses incurred by Executive in connection with his duties  hereunder,  all to
the  date of  termination  (collectively  Accrued  Compensation),  but no  other
compensation  or  reimbursement  of any  kind,  including,  without  limitation,
severance  compensation,  and thereafter,  the Company's  obligations  hereunder
shall terminate.

         6.2 By Disability.  If Executive is prevented from properly  performing
his duties hereunder by reason of any physical or mental incapacity for a period
of 120 consecutive days, or for 180 days in the aggregate in any 365-day period,
then, to the extent  permitted by law, the Company may terminate the  employment
of Executive at such time. In such event, the Company shall pay to Executive all
Accrued  Compensation,  and shall  continue to pay to Executive  the Base Salary
until such time (but not more than 90 days following termination),  as Executive
shall  become  entitled  to  receive  disability  insurance  payments  under the
disability insurance policy maintained by the Company, but no other compensation
or  reimbursement  of  any  kind,   including  without   limitation,   severance
compensation,   and  thereafter  the  Company's   obligations   hereunder  shall
terminate.  Nothing in this Section  shall affect  Executive's  rights under any
disability plan in which he is a participant.

         6.3 By Company for Cause.  The Company may  terminate  the  Executive's
employment for Cause (as defined  below)  without  liability at any time with or
without advance notice to Executive. The Company shall pay Executive all Accrued
Compensation,  but no other compensation or reimbursement of any kind, including
without  limitation,   severance  compensation,  and  thereafter  the  Company's
obligations  hereunder shall terminate.  Termination shall be for "Cause" in the
event of the occurrence of any of the following:  (a) any intentional  action or
intentional  failure to act by Executive which was performed in bad faith and to
the material detriment of the Company;  (b) Executive  intentionally  refuses or
intentionally fails to act in accordance with any lawful and proper direction or
order of the Board; (c) Executive  willfully and habitually  neglects the duties
of employment;  or (d) Executive is convicted of a felony crime  involving moral
turpitude, provided that in the event that an of the foregoing events is capable
of being cured, the Company shall provide written notice to Executive describing
the nature of such event and Executive  shall  thereafter have ten (10) business
days to cure such event.

         6.4  Termination  Without Cause. At any time, the Company may terminate
the employment of Executive without liability other than as set forth below, for
any reason not  specified  in Section  6.3  above,  by giving  thirty  (30) days
advance  written  notice  to  Executive.  If the  Company  elects  to  terminate
Executive  pursuant to this Section 6.4, (a) the Company  shall pay to Executive
all Accrued  Compensation  (b) the Company shall continue to pay to Executive as
provided herein Executive's Base Salary over the period equal to nine (9) months
from the date of such termination as severance compensation,  (c) if Executive's
employment  terminates  in the second half of the  Company's  fiscal  year,  the
Company  shall make a lump sum payment to  Executive in an amount equal to a pro
rata portion of the Executive's annual actual cash incentive bonus for Company's
fiscal year preceding the year of  termination  based on the number of completed
months of Executive's employment in the fiscal year divided by nine (9); (d) the
vesting of all outstanding  stock options held by Executive shall be accelerated
so that the amount of shares vested under such option shall equal that number of
shares  which would have been vested if the  Executive  had  continued to render
services  to the Company for nine (9)  continuous  months  after the date of his
termination  of  employment;  and (e) the Company  shall pay all costs which the
Company would otherwise have incurred to maintain all of Executive's  health and
welfare, and retirement benefits (either on the same or substantially equivalent
terms and  conditions) if the Executive had continued to render  services to the
Company for nine (9)  continuous  months  after the date of his  termination  of
employment.  The Company shall have no further  obligations  to Executive  other
than those set forth in the preceding sentence. During the period when such Base
Salary  severance  compensation is being paid to Executive,  Executive shall not
(i) engage, directly or indirectly,  in providing services to any other business
program or project that is competitive  to a program or project being  conducted
by the  Company  or any  Affiliated  Company  at the  time  of  such  employment
termination  (provided  that Executive may own less than two percent (2%) of the
outstanding  securities  of any  publicly  traded  corporation),  or (ii)  hire,
solicit,  or attempt  to solicit on behalf of himself or any other  party or any
employee or exclusive  consultant of the Company. If the Company terminates this
Agreement or the employment of Executive with the Company other than pursuant to
Section 6.1, 6.2 or 6.3, then this section 6.4 shall apply.

         6.5 Constructive Termination A Constructive Termination shall be deemed
to be a termination of employment of Executive without cause pursuant to Section
6.4 For Purposes of this Agreement, a "Constructive  Termination" means that the
Executive  voluntarily  terminates his employment after any of the following are
undertaken without Executive's express written consent:

     (a)  the  assignment to Executive of any duties or  responsibilities  which
          result in any diminution or adverse  change of  Executive's  position,
          status or  circumstances  of  employment;  or any removal of Executive
          from or any failure to re-elect  Executive  to any of such  positions,
          except in connection with the termination of his employment for death,
          disability, retirement, fraud, misappropriation,  embezzlement (or any
          other occurrence which  constitutes  "Cause" under section 6.3) or any
          other  voluntary  termination of employment by Executive  other than a
          Constructive Termination;

     (b)  a  reduction  by the  Company in  Executive's  annual  Base  Salary by
          greater than five percent (5%);

     (c)  a relocation of Executive or the Company's principal executive offices
          if Executive's principal office is at such offices, to a location more
          than forty (40) miles from the  location  at which  Executive  is then
          performing his duties,  except for an opportunity to relocate which is
          accepted by Executive in writing;

     (d)  any material breach by the Company of any provision of this Agreement;
          or

     (e)  any failure by the Company to obtain the  assumption of this Agreement
          by any successor or assign of the Company.

         6.6  Termination  Following  Change  in  Control  In  the  event  of  a
non-renewal  of this  Agreement,  a termination  without Cause or a Constructive
Termination within eighteen (18) months following a Change in Control, Executive
shall receive the same benefits  package as Executive would have received upon a
termination  without Cause (except that the payment of Base Salary shall be made
in the form of a lump sum) and in addition, the vesting of all outstanding stock
options  held by  Executive  shall  be  accelerated  so  that  the  options  are
immediately exercisable in full.

         6.7 Change in Control.  For  purposes of this  Agreement,  a "Change in
Control"  shall have  occurred  if at any time  during  the term of  Executive's
employment hereunder, any of the following events shall occur:

     (a)  The Company is merged,  or  consolidated.  or reorganized into or with
          another  corporation  or other legal  person,  and as a result of such
          merger,  consolidation or reorganization less than 50% of the combined
          voting power of the then-outstanding securities of such corporation or
          person immediately after such transaction are held in the aggregate by
          the holders of voting  securities of the Company  immediately prior to
          such transaction;

     (b)  The Company sells all or substantially  all of its assets or any other
          corporation or other legal person and thereafter, less than 50% of the
          combined voting power of the then-outstanding voting securities of the
          acquiring  or  consolidated  entity are held in the  aggregate  by the
          holders of voting securities of the Company  immediately prior to such
          sale;

     (c)  There is a report  filed after the date of this  Agreement on Schedule
          13 D or schedule 14 D-1 (or any successor  schedule,  form or report),
          each as promulgated  pursuant to the  Securities  Exchange Act of l934
          (the "Exchange Act")  disclosing that any person (as the term "person"
          is used in Section  13(d)(3) or Section  14(d)(2) of the exchange Act)
          has  become  the  beneficial  owner (as the term  beneficial  owner is
          defined  under  Rule  13d-3  or  any  successor   rule  or  regulation
          promulgated  under the Exchange Act)  representing  50% or more of the
          combined voting power of the then-outstanding voting securities of the
          Company;

     (d)  The Company shall file a report or proxy statement with the Securities
          and Exchange  Commission  pursuant to the Exchange Act  disclosing  in
          response to item 1 of Form 8-X  thereunder or Item 5(f) of Schedule 14
          A  thereunder  (or any  successor  schedule,  form or  report  or item
          therein)  that the change in control  of the  Company  has or may have
          occurred  or  will  or  may  occur  in  the  future  pursuant  to  any
          then-existing contract or transaction; or

     (e)  During any period of two  consecutive  years,  individuals  who at the
          beginning of any such period  constitute  the directors of the Company
          cease for any reason to constitute at least a majority  thereof unless
          the  election  to  the   nomination  for  election  by  the  Company's
          shareholders of each director of the Company first elected during such
          period was approved by a vote of at least  two-thirds of the directors
          of the Company then still in office who were  directors of the Company
          at the beginning of such period.

         6.8 Termination by Executive.  At any time, Executive may terminate his
employment by giving thirty (30) days advance written notice to the Company. The
Company shall pay Executive all Accrued Compensation,  but no other compensation
or  reimbursement  of  any  kind,   including  without   limitation,   severance
compensation,   and  thereafter  the  Company's   obligations   hereunder  shall
terminate.

         6.9  Mitigation  Except  as  otherwise  specifically  provided  herein,
Executive  shall not be required to mitigate the amount of any payment  provided
under this Agreement by seeking other employment or  self-employment,  nor shall
the amount of any payment  provided  for under this  Agreement be reduced by any
compensation  earned by Executive as a result of employment by another  employer
or  through  self-employment  or  by  retirement  benefits  after  the  date  of
Executive's termination of employment from the Company.

         6.10 Coordination If upon termination of employment,  Executive becomes
entitled to rights under other plans,  contracts or arrangements entered into by
the Company, this Agreement shall be coordinated with such other arrangements so
that  Executive's  rights under this  Agreement  are not  reduced,  and that any
payments  under  this  Agreement  offset the same  types of  payments  otherwise
provided under such other arrangements, but do not otherwise reduce any payments
or benefits under such other arrangements to which Executive becomes entitled.

                                    ARTICLE 7

                               GENERAL PROVISIONS

         7.1  Governing  law. The  validity,  interpretation,  construction  and
performance of this Agreement and the rights of the parties  thereunder shall be
interpreted and enforced under California law without reference to principles of
conflicts of laws.  The parties  expressly  agree that inasmuch as the Company's
headquarters  and principal  place of business are located in California,  it is
appropriate that California law govern this Agreement.

         7.2 Assignment; Successors Binding Agreement.

                  7.2.1  Executive  may  not  assign,  pledge  or  encumber  his
         interest in this Agreement or any part thereof.

                  7.2.2 The Company will require any successor  (whether  direct
         or indirect, by purchase, merger, consolidation or otherwise) to all or
         substantially  all of the business  and/or  assets of the  Company,  by
         operation  of law or by  agreement  in form  and  substance  reasonably
         satisfactory  to  Executive,  to  assume  and  agree  to  perform  this
         Agreement  in the same  manner and to the same  extent that the Company
         would be required to perform it if no such succession had taken place.

                  7.2.3  This  Agreement  shall  inure to the  benefit of and be
         enforceable   by   Executive's   personal  or  legal   representatives,
         executors, administrators, successors, heirs, distributee, devisees and
         legatees.  If  Executive  should  die while any  amount is at such time
         payable to his hereunder,  all such amounts,  unless otherwise provided
         herein, shall be paid in accordance with the terms of this Agreement to
         Executive's devisee,  legates or other designee or, if there be no such
         designee, to his estate.

         7.3  Certain  Reduction  of  Payments  In the event that any payment or
benefit  received or to be  received by  Executive  under this  Agreement  would
result in all or a portion  of such  payment  to be subject to the excise tax on
"golden  parachute  payments" under Section 4999 of the Internal Revenue Code of
1986, as amended (the "Code"),  then Executive's payment shall be either (a) the
full  payment or (b) such lesser  amount which would result in no portion of the
payment being subject to excise tax under Section 4999 of the Code, whichever of
the foregoing  amounts,  taking into account the applicable  Federal,  state and
local employment taxes, income taxes, and the excise tax imposed by Section 4999
of the Code,  results in the receipt by Executive on an after-tax  basis, of the
greatest amount of the payment  notwithstanding  that all or some portion of the
payment may be taxable under Section 4999 of the Code.

         7.4 Notice.  For the purposes of this Agreement,  notices and all other
communications  provided for in this Agreement  shall be in writing and shall be
deemed  to have been duly  given  when  delivered  or  mailed  by  certified  or
registered mail,  return receipt  requested,  postage prepaid,  addressed to the
respective  addresses  set forth below or to such other  address as either party
may have furnished to the other in writing in accordance  herewith,  except that
notice of change of address shall be effective only upon receipt.

         To the Company:

         Neurocrine Biosciences, Inc.
         10555 Science Center Drive
         San Diego, CA 92121
         Attn.: President & Chief Executive Officer

     To Executive:
         Ms. Margaret Valeur-Jensen
         4507 South Lane
         Del Mar, CA  92014


         7.5  Modification;  Waiver;  Entire  Agreement.  No  provisions of this
Agreement may be modified, waived or discharged unless such waiver, modification
or discharge is agreed to in writing signed by Executive and such officer as may
be  specifically  designated  by the Board of the  Company.  No waiver by either
party  hereto at any time of any  breach by the  other  party of, or  compliance
with, any condition or provision of this Agreement to be performed by such other
party shall be deemed a waiver of similar or dissimilar provisions or conditions
at the same or any prior or subsequent  time. No agreements or  representations,
oral or otherwise, express or implied, with respect to the subject matter hereof
have  been  made by  either  party  which  are not  expressly  set forth in this
Agreement.

         7.6 Validity.  The invalidity or  unenforceability  of any provision of
this  Agreement  shall not affect the  validity or  enforceability  of any other
provision of this Agreement, which shall remain in full force and effect.

         7.7  Controlling  Document.  Except to the extent  described in Section
6.l0,  in case of  conflict  between  any of the  terms  and  condition  of this
Agreement and the document  herein referred to, the terms and conditions of this
Agreement shall control.

         7.8 Executive  Acknowledgment.  Executive  acknowledges (a) that he has
consulted with or has had the opportunity to consult with independent counsel of
his own choice  concerning this Agreement,  and has been advised to do so by the
Company, and (b) that he has read and understands the Agreement,  is fully aware
of its legal effect, and has entered into it freely based on his own judgment.

         7.9 Remedies

                  7.9.1 Injunctive  Relief.  The parties agree that the services
         to be rendered by Executive  hereunder  are of a unique nature and that
         in the event of any breach or threatened breach of any of the covenants
         contained  herein,  the damage or imminent  damage to the value and the
         goodwill of the Company's  business will be  irreparable  and extremely
         difficult  to  estimate,  making  any  remedy  at  law  or  in  damages
         inadequate.  Accordingly,  the parties  agree that the Company shall be
         entitled to  injunctive  relief  against  Executive in the event of any
         breach or threatened  breach of any such  provisions  by Executive,  in
         addition  to any  other  relief  (including  damage)  available  to the
         Company under this Agreement or under law.

                  7.9.2 Exclusive.  Both parties agree that the remedy specified
         in Section  7.9.1 above is not  exclusive  of any other  remedy for the
         breach by Executive of the terms hereof.

         7.10  Counterparts.  This  Agreement  may be  executed  in one or  more
counterparts,  all of which taken  together  shall  constitute  one and the same
Agreement.

         7.11  Prevailing  Party  Expenses.  In the  event  that any  action  or
proceeding is commenced to enforce the  provisions of the  Agreement,  the court
adjudicating  such action or proceeding  shall award to the prevailing party all
costs and  expenses  thereof,  including,  but not  limited  to, all  reasonable
attorneys' fees, court costs, and all other related expenses.

Executed by the parties as of the day and year first above written.

EXECUTIVE                                    NEUROCRINE BIOSCIENCES, INC

By: /s/Bruce Campbell, Ph.D.                 By: /s/Gary A. Lyons
    Bruce Campbell, Ph.D.                    Gary A. Lyons
                                             President & Chief Executive Officer





                          NEUROCRINE BIOSCIENCES, INC.


                                   State of 
                                 Incorporation
Subsidiary                        or Formation                    Ownership
- --------------------------       -------------                    ---------
Northwest NeuroLogic, Inc.          Oregon                            100%






               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS



     We consent to the incorporation by reference in the Registration  Statement
(Form S-8 No. 333-5787) pertaining to the Neurocrine  Biosciences,  Inc. Amended
1992  Incentive  Stock Plan,  the  Neurocrine  Biosciences,  Inc.  Amended  1996
Director Option Plan and the Northwest NeuroLogic,  Inc. Restated 1997 Incentive
Stock Plan of our report dated  January 26,  1999,  except for Note 13 for 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.


                                                 ERNST & YOUNG LLP

San Diego, California
January 26, 1999,
except for Note 13, as to which the date is
March 2, 1999


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