COCENSYS INC
10-K, 1999-03-31
PHARMACEUTICAL PREPARATIONS
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-K

               [X] 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
                         COMMISSION FILE NUMBER 0-20954

                                 COCENSYS, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

                   DELAWARE                                   33-0538836
(STATE OR OTHER JURISDICTION OF INCORPORATION OR           (I.R.S. EMPLOYER
                ORGANIZATION)                             IDENTIFICATION NO.)

           201 TECHNOLOGY DRIVE, IRVINE, CA                       92618
       (ADDRESS OF PRINCIPAL EXECUTIVE OFFICE)                  (ZIP CODE)

                                 (949) 753-6100
              (REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE)

Securities registered pursuant to Section 12(b) of the Act: NONE

Securities registered pursuant to Section 12(g) of the Act: COMMON STOCK
                                                            PAR VALUE $0.001 
                                                            PER SHARE

         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 and 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 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 approximate aggregate market value of the Common Stock held by
non-affiliates of the registrant, based upon the closing price of the Common
Stock reported on the Nasdaq National Market on March 1, 1999, was $8,865,694.

         The number of shares of Common Stock outstanding as of March 1, 1999,
was 33,508,618.

                       DOCUMENTS INCORPORATED BY REFERENCE

Certain portions of the registrant's definitive proxy statement, to be filed not
later than 120 days after December 31, 1998 in connection with the registrant's
1999 Annual Meeting of Stockholders, are incorporated by reference into Part III
of this Form 10-K.

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PART I


ITEM 1.  BUSINESS

SPECIAL NOTE REGARDING FORWARD LOOKING STATEMENTS

         SOME OF THE STATEMENTS IN THIS 10-K ARE FORWARD-LOOKING STATEMENTS. 
THESE STATEMENTS INVOLVE KNOWN AND UNKNOWN RISKS, UNCERTAINTIES, AND OTHER 
FACTORS THAT MAY CAUSE OUR RESULTS, LEVEL OF ACTIVITY, PERFORMANCE OR 
ACHIEVEMENTS TO BE MATERIALLY DIFFERENT FROM ANY FUTURE RESULTS, LEVEL OF 
ACTIVITY, PERFORMANCE OR ACHIEVEMENTS EXPRESSED OR IMPLIED BY SUCH 
FORWARD-LOOKING STATEMENTS. THESE FACTORS INCLUDE, AMONG OTHERS, THOSE 
DISCUSSED BELOW UNDER "BUSINESS RISKS."

         IN SOME CASES, YOU CAN IDENTIFY FORWARD-LOOKING STATEMENTS BY 
TERMINOLOGY SUCH AS "MAY," "WILL," "SHOULD," "COULD," "EXPECTS," "PLANS," 
"ANTICIPATES," "BELIEVES," "ESTIMATES," "PREDICTS," "POTENTIAL," OR 
"CONTINUE" OR THE NEGATIVE OF SUCH TERMS OR OTHER COMPARABLE TERMINOLOGY.

         ALTHOUGH WE BELIEVE THAT THE EXPECTATIONS REFLECTED IN THE 
FORWARD-LOOKING STATEMENTS ARE REASONABLE, WE CANNOT GUARANTEE FUTURE 
RESULTS, LEVEL OF ACTIVITY, PERFORMANCE OR ACHIEVEMENTS. WE DO NOT ASSUME 
RESPONSIBILITY FOR THE ACCURACY AND COMPLETENESS OF THE FORWARD-LOOKING 
STATEMENTS. WE DO NOT INTEND TO UPDATE THIS 10-K AFTER IT IS FILED SO THAT 
THE FORWARD-LOOKING STATEMENTS CONFORM TO ACTUAL RESULTS.

OVERVIEW

         CoCensys, Inc. is a biopharmaceutical company dedicated to the 
discovery and development of small molecule drugs to treat neurological and 
psychiatric disorders. In addition, we provide product development expertise 
to our collaboration partners and external clients.

         Our business strategy features three business drivers: our 
technology; our ability to provide product development services to our 
partners; and our ability to provide product development services to a niche, 
under served segment of the contract research organization market.

         CoCensys' technology is focused on the exploration of novel 
receptors and their ligands and inhibitors through three technology 
platforms: specific GABAA receptor modulators named epalons; glutamate 
receptor antagonists; and sodium channel blockers. We are working to build a 
portfolio of products for disorders of the central nervous system, both 
through discovery and development of products utilizing the technical 
expertise and creativity of our scientists and through the in-licensing of 
new technology and product candidates.

         We conduct discovery and development of our products through 
internal resources and by licensing our technologies to collaboration 
partners who fund further research and development of our products. In 
addition, as we negotiate potential collaboration agreements for our 
technologies, we also negotiate for the right to conduct clinical trials in 
North America on products licensed to our collaboration partners, with 
clinical development costs paid for by the partners. We believe this may 
allow CoCensys to participate more fully in the future development of our 
compounds and generate revenue.


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<PAGE>

         Along with providing services to our partners, we are offering our
services to selected pharmaceutical and biotechnology companies that have
technologies poised for development and are seeking to augment their own
internal development capabilities. We believe this may allow us to further
utilize our development resources and generate additional revenue.

BACKGROUND ON COCENSYS TECHNOLOGIES

         In the brain, chemical messengers called neurotransmitters carry 
signals between nerve cells (neurons). The signals, which are received by 
cell surface receptors, can be either excitatory or inhibitory. Excitatory 
signals increase the electrical firing of neurons receiving the signals, 
while inhibitory signals decrease firing. The proper functioning of the brain 
hinges on a delicate balance between excitatory and inhibitory signals.

         Each neurotransmitter has a specific receptor, and we are working to 
design products that are highly selective for specific receptor types. Many 
of the current central nervous system ("CNS") drugs targeting the receptor 
for a particular neurotransmitter also affect other receptors distributed 
throughout the CNS or throughout the body. This lack of receptor specificity 
produces unwanted CNS side effects such as sedation, anxiety, delirium, 
hallucinations, impaired memory and learning and alcohol potentiation 
(increased alcohol toxicity), along with the potential for cardiovascular 
side effects.

TECHNOLOGY AND PRODUCT DEVELOPMENT

         As described below, our product discovery and development programs 
are focused on three technology platforms: specific GABAA receptor modulators 
named epalons; glutamate receptor antagonists; and sodium channel blockers. 
In March 1998, we transferred rights to our technology platform relating to 
apoptosis (programmed cell death) to Cytovia, Inc. in exchange for equity 
ownership in and royalties and certain future development rights from 
Cytovia. The table on the next page sets forth the status of each of our 
technologies.

GABA RECEPTOR MODULATORS OR EPALONS

         Our proprietary epalon compounds are based on the discovery by 
CoCensys' founding scientists of a novel neuroreceptor site located on the 
type A of the gamma-amino butyric acid ("GABAA") receptor complex, and the 
molecules, or ligands, that specifically interact with that receptor site. 
GABA is the predominant inhibitory neurotransmitter in the brain. Numerous 
brain activities are affected by the degree to which GABA opens the chloride 
channels that allow the calming of neurons. A decrease in GABA activity 
allows neurons to remain excited for longer periods, which can lead to 
anxiety and, at the extreme, convulsions. A significant increase in levels of 
GABA activity can result in sedation and sleep. GABA binds to GABAA receptor 
complexes to calm excited neurons. When GABA binds with its receptor, it 
opens a chloride channel in the membrane of the stimulated neuron, admitting 
chloride ions that calm the excited neuron. Augmentation of the functions of 
the GABAA receptor-gated chloride channel may be beneficial in the treatment 
of disease states such as epilepsy, migraine, anxiety and insomnia.


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COCENSYS PRODUCTS IN DEVELOPMENT

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                            <C>                              <C>                                      <C>
PRODUCTS                       INDICATIONS                      DEVELOPMENT STAGE                        COMMERCIALIZATION RIGHTS
- ------------------------------------------------------------------------------------------------------------------------------------
GABAA RECEPTOR MODULATORS                                                                                
- --------------------------                                                                               
Ganaxolone                     Epilepsy,         including      Completed  a  series  of  Phase  II      CoCensys
(CCD 1042)                     complex  partial   seizures      trials   for   infantile    spasms,      
                               and    infantile    spasms;      complex partial  seizures in adults      
                               migraine prophylaxis             and   acute   migraine;   initiated      
                                                                Phase  II  trial   for   catamenial      
                                                                epilepsy     and      investigating      
                                                                possible    migraine    prophylaxis      
                                                                indication                               
                                                                                                         

CCD  3693   and   back-up      Insomnia                         Completed   a  series  of  Phase  I      CoCensys
compounds                                                       safety trials                            
                                                                                                         

Co 2-6749 and back-            Anxiety disorders                Pre-clinical development                 CoCensys/
Up compounds                                                                                             Wyeth-Ayerst
- ------------------------------------------------------------------------------------------------------------------------------------
GLUTAMATE
  RECEPTOR                                                                                
  ANTAGONISTS                                                                                            
- --------------------------                                                                               
Licostinel                     Stroke; tinnitus                 Completed   a  series  of  Phase  I      CoCensys
(ACEA 1021)                                                     safety trials in stroke                  
                                                                                                         

SSNRAs                         Parkinson's        disease,      Pre-clinical development                 CoCensys/
                               epilepsy,  chronic pain and                                               Warner-Lambert
                               cerebral ischemia                                                         
                                                                                                         
Glutamate        Receptor      Ophthalmic disorders             Research with Senju Pharmaceuticals      CoCensys/
  Antagonists                                                                                            Warner-Lambert
                                                                                                         
AMPA Receptor Modulators       Neurodegenerative                Research                                 CoCensys
                               disorders;           sexual                                               
                               dysfunction                                                               

- ------------------------------------------------------------------------------------------------------------------------------------
SODIUM CHANNEL BLOCKERS                                                                                  
- --------------------------                                                                               
Co 102862                      Neuropathic     pain    and      Pre-clinical development                 CoCensys
                               epilepsy                                                                  

- ------------------------------------------------------------------------------------------------------------------------------------
APOPTOSIS  INHIBITOR  AND                                                                                
  SCREENING TECHNOLOGY                                                                                   
- --------------------------                                                                               
Apoptosis Inhibitors;          Degenerative     disorders;      Research                                 Cytovia,  a spin-off  from
Apoptosis Screening Cells      drug screening                                                            CoCensys
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


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         Our founders were among the first to demonstrate that an endogenous 
(naturally occurring) class of related ligands (molecules that interact 
specifically with receptors), called epalons, modulates the activity of GABA 
in opening the chloride channel at the GABAA receptor complex. Studies 
indicate that epalons themselves have limited activity on the chloride 
channel. However, epalons modulate the GABAA receptor by enhancing the 
ability of GABA to open the chloride channel. Thus, epalons work primarily 
when GABA is present.

         We have synthesized over one thousand analogs of endogenous epalons. 
We have selected several development candidates from this group of synthetic 
epalons. CoCensys' epalon development programs target epilepsy, migraine 
prophylaxis, insomnia and anxiety. We are considering additional indications 
for epalons, such as anesthesia.

         GANAXOLONE (CCD 1042). We are developing ganaxolone to treat certain 
types of epilepsy, including complex partial seizures and infantile spasms, 
and as a potential drug for migraine prophylaxis. In November 1993, we filed 
an investigational new drug application ("IND") with the United States Food 
and Drug Administration for the treatment of epilepsy. We completed Phase I 
clinical trials of ganaxolone in 210 healthy volunteers, providing 
preliminary indications of the drug's safety, tolerability and 
pharmacokinetics; no significant adverse effects were observed. We commenced 
Phase II trials at the end of 1994 with pediatric epilepsy patients and at 
the end of 1996 for adult epilepsy patients. Further, we filed an IND for 
migraine in January 1997 and completed Phase II trials in migraine patients 
in 1997 using a liquid formulation and 1998 using a tablet formulation.

         GANAXOLONE FOR EPILEPSY. Epilepsy is a chronic brain disorder which 
affects approximately one percent of the world population. Many drugs 
currently available to treat epilepsy are administered in high doses and have 
the potential for significant toxicity including teratogenicity. In addition, 
these drugs have nonspecific interactions with receptors throughout the 
brain, resulting in significant side effects such as adverse impacts on 
learning and memory. Animal studies conducted by CoCensys, which included 
side-by-side comparisons with existing anti-epileptic drugs, suggest that 
ganaxolone has a broad profile of anti-seizure activity and a favorable 
side-effect profile. Based upon these studies, we believe that ganaxolone may 
have therapeutic potential in a variety of seizure types.

         We completed our first Phase II clinical trial in France in 
pediatric patients with epilepsy refractory to current treatments. In 
November 1996, we announced that the study showed a clinically meaningful 
response in this difficult to treat patient population. In 1997, we 
replicated those results in similar Phase II pediatric trials in France and 
the United States.

         In 1997, we also announced positive results from our Phase II U.S. 
trial in adult epilepsy patients, which commenced at the end of 1996. The 
trial included 52 epilepsy patients, ages 18 to 65, who had experienced such 
debilitating seizures that they were candidates for possible surgical 
treatment. Following their pre-surgical evaluations, while they were not 
taking any other anti-epileptic medications, the patients were given oral 
doses of either ganaxolone or a placebo for up to eight days or until a 
predefined seizure frequency or type caused them to drop out of the study. 
The patients who received placebo were twice as likely to experience an 
unacceptable frequency or severity of seizures as those taking ganaxolone. 
There were two serious adverse events reported. Both of the events appeared 
to be related to withdrawal from the subjects' original drug regimen, and one 
of the events occurred in a patient who received placebo.


                                        5
<PAGE>

         Currently, we have initiated a Phase II trial for female patients 
who suffer from seizures around the time of their menstrual cycle, known as 
"catamenial epilepsy." In addition, we are seeking a collaboration partner to 
continue development of ganaxolone for epilepsy. Please see "Business Risks" 
below for a discussion of risks associated with our ability to secure a 
collaboration partner and continue the development of ganaxolone, including 
without limitation the risk captioned "We depend on third parties to fund our 
drug development."

         GANAXOLONE FOR MIGRAINE PROPHYLAXIS. Migraine, a severe and 
frequently debilitating headache, is the most common neurological disorder. 
It is estimated that approximately 23 million people in the United States 
suffer some degree of recurrent migraine headaches. The underlying cause of 
migraine is poorly understood, but the pain has long been believed to arise 
from the dilation of blood vessels in a layer of the brain lining. Research 
has suggested that the local inflammation caused by substances released by 
nerve endings attached to those blood vessels may exacerbate the pain. Based 
on pre-clinical studies conducted by researchers at Massachusetts General 
Hospital, a teaching hospital affiliated with the Harvard Medical School, 
that suggested the potential utility of ganaxolone to treat migraine and 
using clinical data generated on ganaxolone through the epilepsy program, we 
tested ganaxolone in two Phase II trials for migraine sufferers.

         In the first trial, 252 pre-menopausal women were given oral doses 
of placebo or one of four dose levels of ganaxolone. Preliminary results 
released in November 1997 showed that, although there was no significant 
difference among the treated and placebo groups overall, there was a 
substantial increase in response as a function of plasma drug level at two 
and four hours after the patients were dosed. In the trial, 14 of the 23 
patients who achieved plasma drug levels of 80 ng/mL or more achieved pain 
relief in two hours, while an additional six patients (for a total of 20 out 
of 23) achieved pain relief in four hours. Importantly, no serious adverse 
events or cardiovascular side effects were reported in the trial.

         In the second trial, 325 female and male migraine patients were 
dosed with a tablet formulation of either ganaxolone or a placebo. Our 
primary endpoints were pain relief at two and four hours post dosing. While 
the patients receiving ganaxolone reported pain relief at a rate in excess of 
those receiving placebo, the difference was not statistically significant. 
However, we did achieve statistically significant pain relief at two hours in 
a subset of 45 female patients who were dosed with ganaxolone or placebo 
within five days following start of menses.

         Following these results, and based on our research regarding 
similarities between ganaxolone and another drug approved for migraine 
prophylaxis (divalproex sodium), we are investigating use of ganaxolone as a 
prophylactic treatment for migraine. Further development of ganaxolone for 
migraine prophylaxis will be determined in conjunction with any collaboration 
agreement that we enter into for development of ganaxolone.

         CO 2-6749 FOR ANXIETY. The market for drugs to treat anxiety is 
currently served by a class of drugs called benzodiazepines, such as 
Valium(R) and Xanax(R), and to a lesser extent, by drugs such as BuSpar(R). 
Benzodiazepines cause several serious side effects, including sedation, 
potentiation of alcohol toxicity, cognitive impairment and abuse potential. 
BuSpar, while exhibiting fewer side effects than benzodiazepines, requires up 
to several days of administration before producing a therapeutic effect. 
Because of its highly specific and natural mode of action, we believe that 
our class of anxiolytic epalons may prove to have a more favorable ratio 
between efficacy and side effects in treating anxiety disorders than existing 
drug therapies.


                                        6
<PAGE>

         In May 1997, CoCensys licensed to American Home Products 
Corporation, through its Wyeth-Ayerst Laboratories Division, our epalon 
compound Co 2-6749, along with its back-up compounds, for development as 
anxiolytics. The program currently is in the pre-clinical development stage.

         Under our agreement, Wyeth-Ayerst is required to fund the 
development of Co 2-6749. In addition, Wyeth-Ayerst is obligated to support 
CoCensys' research for up to three years at $3 million per year to identify 
additional compounds that may have better efficacy or side-effect profiles 
than Co 2-6749, generally referred to as "back-up" compounds. If Co 2-6749 
fails to meet certain criteria, then Wyeth-Ayerst may choose to develop a 
back-up compound in place of Co 2-6749. Also, if Co 2-6749 fails to meet its 
criteria, and if the back-up program fails to produce a back-up compound that 
meets other pre-defined criteria, Wyeth-Ayerst has the right to terminate the 
back-up program and require CoCensys to reimburse to Wyeth-Ayerst a portion 
of the funds paid by Wyeth-Ayerst to CoCensys to fund the back-up program. As 
of December 31, 1998, the portion of funds that may be subject to repayment 
is $2.6 million.

         Wyeth-Ayerst is obligated to pay to CoCensys certain nonrefundable 
milestone payments under the Wyeth-Ayerst Agreement upon the achievement of 
key development events and the outcome of product labeling. CoCensys has the 
right to co-promote in the United States Co 2-6749 or a replacement compound 
and share any profits proportionally. Wyeth-Ayerst has the exclusive right to 
develop, register and market the compound in the rest of the world, subject 
to specified royalty payments.

         CCD 3693 FOR INSOMNIA. Currently the prescription market for the 
treatment of insomnia is largely served by Ambien(R), marketed by G.D. Searle 
& Co., which works on a specific sub-type of the benzodiazepine receptor. 
Ambien is a "Schedule 4" drug, meaning it may have limited potential to cause 
physical or psychological dependence. Current hypnotic drugs may affect 
short-term memory, cause rebound insomnia and have "day after" effects. 
CoCensys believes that, because CCD 3693 has a different mechanism of action, 
it may have a better side-effect profile.

         In 1996, we entered into a collaboration agreement with Searle to 
develop CCD 3693 for the treatment of insomnia. Searle initiated Phase I 
clinical studies in Europe in 1997 while we worked on an active back-up 
program to identify additional compounds for the target indication. In July 
1998, we received notification from Searle that it decided not to participate 
further in the collaboration, stating that the program no longer met its 
needs in light of its entire product pipeline. We retained all rights to the 
compounds in the program, including CCD 3693, and we are continuing to 
explore the potential use of epalons to treat insomnia.

GLUTAMATE RECEPTOR ANTAGONISTS

         Our proprietary glutamate receptor antagonist program includes three 
classes of compounds. To date, two programs are targeted at the 
N-methyl-D-aspartate ("NMDA") receptor complex and a third focuses on the 
(alpha)-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid ("AMPA") receptor.

         Glutamate is the most abundant excitatory amino acid in the central 
nervous system and is the principal excitatory neurotransmitter in the brain. 
Glutamate triggers three major receptor complexes in the brain: NMDA, AMPA 
and Kainate. Glutamate's effect on these receptors enables brain cells to 
direct cognition, memory, movement and sensation. However, glutamate can 


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<PAGE>

over stimulate neurons, which can lead to neuronal death. When over 
stimulated neurons die, they release more glutamate, triggering a spreading 
cascade of glutamate over stimulation in other neurons that may continue for 
hours or even days, thereby producing significant brain damage in stroke 
patients or a worsening condition in individuals with neurodegenerative 
disorders such as schizophrenia, epilepsy and Alzheimer's disease.

         The NMDA receptor has binding sites for a number of different 
agents, including glutamate and glycine. When both of these neurotransmitters 
bind to the NMDA receptor complex, a calcium ion channel is opened that 
permits calcium ions to enter and stimulate the neuron. A number of compounds 
that block the effect of glutamate on the NMDA receptor have been tested by 
others in animal models of stroke and head trauma and have been found to be 
effective in preventing the ischemic cascade, thereby limiting brain damage. 
Some of these drugs block the influx of calcium ions to the neuron by binding 
to the phencyclidine ("PCP") binding site located on the interior of the ion 
channel associated with the NMDA receptor. While this leads to effective 
nerve cell protection, it also produces the psychotic side effects, such as 
hallucination and agitation, associated with the drug PCP.

         Like the NMDA receptor/ion channel complex, the AMPA receptor 
responds to glutamate binding by opening an ion channel. Long-lasting 
over-activation of AMPA receptors by glutamate, which is believed to occur in 
chronic neurodegenerative diseases and in global brain ischemia (e.g., after 
cardiac arrest), is thought to result in a slow over-stimulation of the 
neurons by calcium, resulting in slowly progressing nerve cell degeneration.

         Research indicates that glycine acts as a modulator or 
co-transmitter with glutamate on the NMDA receptor, so blocking its action 
would lessen the effects of glutamate on neurons. CoCensys has synthesized a 
series of proprietary compounds that are potent antagonists of the glycine 
receptor on the NMDA receptor complex.

         LICOSTINEL (ACEA 1021) FOR STROKE. Cerebral ischemia is oxygen 
deprivation to the brain that may occur when blood flow is interrupted by 
stroke. There are approximately 700,000 strokes per year in the United 
States. It is estimated that costs associated with strokes exceed $25 billion 
annually in healthcare expenses and lost productivity in the United States. 
The drug market for this indication is under served, with few effective 
therapies for treating stroke.

         We are developing our lead glycine antagonist, licostinel, to treat 
stroke patients. In 1994, we began a development collaboration for licostinel 
with Novartis Pharma A.G. (successor to Ciba-Geigy Ltd.) and filed an IND for 
cerebral ischemia resulting from stroke. We completed short-term infusion 
Phase I studies in healthy volunteers and in stroke patients in 1995 and 
1996, respectively. Results of these studies showed no evidence of serious 
side effects, including PCP-like psychosis, agitation or adverse 
cardiovascular effects. In 1997, we reported that preliminary results from 
additional safety trials involving long-term infusion showed crystals of 
licostinel in the urine of some subjects, a potentially dose-limiting side 
effect. However, the crystal formation occurred only in subjects with ten 
times the blood plasma level of licostinel that was therapeutically effective 
in animals. Influenced by the results of the later trials, Novartis ceased 
further participation in the development efforts in April 1997.

         Currently, we are completing an additional Phase I safety trial on 
licostinel as we seek a new partner for further development of the licostinel 
program. Please see "Business Risks" below for a discussion of risks 
associated with our ability to secure a collaboration partner and continue 
the development of the licostinel program, including without limitation the 
risk captioned "We 


                                        8
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depend on third parties to fund our drug development." In addition, we are 
investigating possible use of licostinel to treat patients who suffer from 
tinnitus, or ringing in the ears, based on the existence of NMDA receptors in 
the inner ear. Often, tinnitus is the result of sound-induced hearing damage. 
Tinnitus is a significant health problem; it is estimated that in the United 
States 50 million adults suffer from tinnitus to some degree. Approximately 
12 million of those adults suffer from tinnitus severe enough to seek medical 
help.

         SUBTYPE-SELECTIVE NMDA RECEPTOR ANTAGONISTS ("SSNRAs") are compounds 
that selectively block only one of the NMDA receptor subtypes. Gene cloning 
studies have identified at least four different NMDA receptor subtypes, each 
of which has a distinct anatomical distribution in the brain. CoCensys has 
discovered several novel classes of drugs that selectively target one subtype 
without producing an effect on other subtypes. In animal models, our SSNRAs 
appear to be free of side effects seen with other NMDA antagonists that block 
all four subtypes.

         SSNRAs effectively cross the blood-brain barrier and have exhibited 
efficacy in animal models of cerebral ischemia, Parkinson's Disease, epilepsy 
and chronic pain. Some SSNRAs have been shown to have IN VIVO efficacy after 
oral administration in an animal model of Parkinson's disease, suggesting 
oral bioavailability in this class of compounds. CoCensys believes SSNRAs are 
potential drug candidates for a variety of neurological and psychiatric 
diseases, including cerebral ischemia, Parkinson's disease, epilepsy and 
chronic pain.

         We have been working with our collaboration partner, Warner-Lambert 
Company, since 1995 to identify and develop SSNRA product candidates for a 
broad range of CNS diseases. Our initial agreement with Warner-Lambert, 
through its Parke-Davis division, provided for a two-year research and 
development program; we revised and extended that agreement for an additional 
two years in October 1997 (the "Warner Collaboration Agreement"). The program 
currently is in the pre-clinical development stage.

         Under the Warner Collaboration Agreement, the parties are obligated 
to devote the time of a specified number of scientists to conduct research 
directed toward the identification of SSNRAs as drug development candidates. 
Warner is obligated to pay for all costs to develop any development 
candidates arising from the Agreement, subject to CoCensys' right to 
re-engage in the development by funding a percentage of the development 
costs. Warner is also obligated to pay for all costs to promote any product 
developed under the Warner Collaboration Agreement, subject to CoCensys' 
right to co-promote in the United States (including sharing promotion costs) 
any product for which CoCensys re-engaged development rights. CoCensys will 
receive royalties on sales of any products developed under the Warner 
Collaboration Agreement, at rates based in part upon whether CoCensys 
co-developed and co-promoted such product. In addition, upon achievement of 
certain clinical development and regulatory milestones, Warner will make 
nonrefundable milestone payments to CoCensys.

         Either party may terminate its participation in the Warner 
Collaboration Agreement voluntarily. In the event of a termination by either 
party during the research period, the terminating party would forfeit all 
rights and obligations to co-develop and co-promote any compounds arising 
thereunder, subject to a specified royalty payment to the terminating party, 
and would be precluded from conducting additional research in the SSNRA field 
for a fixed period of time. After the research period, each party may 
terminate on a product-by-product basis. In the event of such termination, 
the party electing to terminate would forfeit all rights and obligations to 
co-develop and co-promote such product, subject to a specified royalty 
payment to the terminating party. We cannot assure you that we will have the 
substantial resources needed to fulfill our research, 


                                        9
<PAGE>

development and commercialization obligations under the Warner Collaboration 
Agreement. If CoCensys is unable to fulfill such obligations, we may be 
required to terminate early under the Collaboration Agreement and forfeit our 
rights thereunder; in such case, we would be entitled to royalties on future 
product sales. Please see "Business Risks" below for a discussion of risks 
associated with our ability to fulfill our obligations under the Warner 
Collaboration Agreement.

         AMPA RECEPTOR ANTAGONISTS prevent glutamate from activating the AMPA 
receptor and are believed to prevent or slow calcium entry into neurons. 
Calcium entry into neurons through AMPA receptors is believed to play a role 
in nerve cell destruction in chronic neurodegenerative diseases. AMPA 
receptor antagonists have shown neuroprotective efficacy in animal models of 
global cerebral ischemia (such as may occur following cardiac arrest or near 
drowning), epilepsy and pain. They also are believed to have potential as 
therapeutic agents in chronic neurodegenerative diseases.

         CoCensys scientists have discovered several different chemical 
classes of novel AMPA receptor antagonists and AMPA receptor modulators. We 
are working to develop compounds through this program that may prove useful 
in the treatment of diseases such as epilepsy, schizophrenia, amyotrophic 
lateral sclerosis (ALS or Lou Gehrig's disease) and other neurodegenerative 
disorders. In addition, AMPA receptor modulators may have utility in certain 
forms of sexual dysfunction.

         In October 1997, as part of the extension of our collaboration 
agreement with Warner-Lambert for development of SSNRAs, the companies agreed 
to expand the collaboration to allow the companies to analyze and consider 
for collaborative development each company's AMPA receptor modulator 
technologies. In January 1998, the companies agreed to narrow the focus of 
our collaboration agreement to its original scope of only the SSNRAs in 
exchange for payment by CoCensys to Warner-Lambert of $1 million, which 
amount is payable in common stock or cash, at the election of Warner-Lambert, 
at the end of 1999. Our AMPA receptor antagonist and modulator technologies 
remain available for partnership.

         OTHER USES. Recently we announced that we entered into research 
agreements with Senju Pharmaceutical Co., Ltd. and Warner-Lambert to explore 
potential ophthalmic indications of glutamate receptor antagonists. One 
agreement, between CoCensys and Senju, will look at our glycine antagonists 
and AMPA receptor antagonists; the other agreement, among CoCensys, Senju and 
Warner-Lambert, will explore the SSNRAs under development by CoCensys and 
Warner-Lambert.

SODIUM CHANNEL BLOCKERS

         Voltage-gated sodium channels ("VGSCs") are essential for the 
initiation and propagation of nerve impulses and therefore play a fundamental 
role in the normal function of the nervous system. Under conditions of 
abnormal neuronal firing, such as during an epileptic seizure or during 
spontaneous discharge from an injured sensory nerve fiber, VGSCs determine 
the threshold for neuronal activation and modulate the frequency and duration 
of repetitive neuronal firing. Drugs that selectively block the inactivated 
state of VGSCs (such as Lamictal(R) and Tegretol(R)) have therefore proven 
clinically effective in the treatment of epilepsy and neuropathic pain 
(including pain resulting from inflammation or damage to peripheral nerve 
endings).


                                        10
<PAGE>

         In 1997, we licensed from The University of Saskatchewan, through 
its technology transfer company, University of Saskatchewan Technologies, 
Inc., rights to a class of novel, small molecule compounds that block the 
VGSCs. The compounds licensed include Co 102862, a structurally-novel VGSC 
blocker that is selective for the inactivated state of VGSCs. Co 102862 
currently is undergoing pre-clinical development at CoCensys for the 
treatment of neuropathic pain and epilepsy. In several pre-clinical animal 
models, Co 102862 demonstrates an anticonvulsant and side-effect profile 
superior to that of Lamictal(R) and Tegretol(R) and potent activity in 
neuropathic pain models. Also, both Lamictal(R) and Tegretol(R) paradoxically 
lower seizure threshold at high doses; however, Co 102862 does not. 
Therefore, we believe that Co 102862 may have an advantage as a treatment for 
neuropathic pain because effective doses for that indication are often 
greater than those that are used in epilepsy.

         Currently, we are preparing an IND for Co 102862. We also are in 
negotiations regarding a potential collaboration to further develop Co 
102862. Please see "Business Risks" below for a discussion of risks 
associated with our ability to secure a collaboration partner and continue 
the development of Co 102862, including without limitation the risk captioned 
"We depend on third parties to fund our drug development."

APOPTOSIS INHIBITORS AND SCREENING CELLS

         Cell death can be a natural physiological process that occurs during 
embryonic development as well as during remodeling of certain adult tissues. 
This natural death of cells, called apoptosis or programmed cell death, 
occurs by a discrete series of molecular events. Apoptosis also can be 
triggered inappropriately in many diseases (including stroke, heart disease 
and certain neurodegenerative disorders). This pathological form of apoptosis 
is thought to play an important role in the loss of cells that occurs in 
these diseases.

         CoCensys discovered novel small molecules that may inhibit 
apoptosis. In addition, we discovered certain compounds that permeate living 
cells and fluoresce when apoptosis is triggered. Although promising for use 
in a variety of disorders, we determined that the technology was outside of 
our focus on development of therapeutics for disorders of the central nervous 
system. Accordingly, in January 1998, we announced the formation of Cytovia, 
Inc., as a technology spin-off to commercialize the apoptosis inhibitor and 
screening cell technology; we completed transfer of technology in March 1998.

         Cytovia is led by Eckard Weber, M.D., former head of research and 
discovery for CoCensys and a current member of CoCensys' Board of Directors; 
in addition, eleven other CoCensys employees joined Cytovia. CoCensys 
retained an equity stake in Cytovia and a seat on Cytovia's Board of 
Directors (currently held by our President and Chief Executive Officer, F. 
Richard Nichol, Ph.D.). In addition, we retained the right to enter into 
contracts on favorable terms with Cytovia to screen our neuroscience-related 
therapeutic compounds and retained a right of first refusal for four years to 
develop for central nervous systems disorders any compound discovered by 
Cytovia. In addition to his continuing duties as a CoCensys Board member, Dr. 
Weber also has continued as a leader and advisor to CoCensys on selected 
scientific development projects.


                                        11
<PAGE>



PRODUCT DEVELOPMENT SERVICES

         As discussed above, our business strategy features three business 
drivers: our technology (as discussed in the prior section); our ability to 
provide product development services to our partners; and our ability to 
provide product development services to a niche, under served segment of the 
contract research organization market.

         As part of our discussions with potential partners for our 
technology, we are negotiating for the right to conduct clinical trials on 
licensed compounds in North America, with costs paid for by the partner. As a 
result, in addition to getting the typical up-front licensing fees, milestone 
payments and royalties from a partner, we could generate revenue by 
performing product development services. In addition, we hope to form 
strategic business alliances with selected pharmaceutical or biotechnology 
companies that have technologies poised for development and are seeking to 
augment their own internal development capabilities.

         Our ability to provide product development services is based on the 
experienced, skilled product development team that we have assembled at 
CoCensys, which is capable of providing "full service" product development 
support to our partners. The team members have significant product 
development experience with pharmaceutical companies, biotechnology companies 
and clinical research organizations. We can provide solutions in the areas of 
expertise listed in following table:

                               Representative Sample of
Area of Expertise              Services Available 
- --------------------------     -----------------------------------------------
Pharmaceutical Sciences        Preformulation studies, formulation,
                               process and analytical method development,
                               stability studies, managing clinical supplies,
                               planning and supervising manufacture of NDA
                               stability, Phase III clinical and commercial
                               validation supplies

Pre-Clinical Safety            Includes drug disposition,  toxicology and 
                               analytical  chemistry;  resources include HPLC, 
                               gas chromatography and LCMS/MS for 
                               pharmacokinetics

Project Management             Planning, tracking, financial and time reporting
                               and critical path management

Clinical Development           Study, protocol and CRF design and development, 
                               site selection, contract management, study 
                               monitoring, data review and coding, final
                               reports, annual reports and Investigator
                               Brochures

Clinical Informatics           CRF design and development, data
                               collection, review, coding and management,
                               statistical programming and analysis, technical
                               writing, validated Oracle Clinical(R) database,
                               Tele-form(R) by Cardiff and ARISlite(TM) by
                               Clinarium

Regulatory Affairs             Includes global regulatory experience;
                               all FDA interactions, including meetings,
                               submissions and inspections, established audit
                               procedures, quality assurance and SOPs, expertise
                               in GMP, GLP and GCP compliance

         Our research and development efforts at CoCensys have focused on
central nervous system disorders; however, CoCensys' professional staff has
extensive experience in successfully 


                                        12
<PAGE>

developing and registering a variety of medical products in many therapeutic 
areas at their prior companies. These areas include cardiovascular, 
broncho-pulmonary, hematology, infectious diseases, gastroenterology, 
endocrinology, women's health, dermatology, anti-inflammatory, 
transplantation, ophthalmology, allergy and immunology, oncology, hair 
growth, neuro-muscular rehabilitation, nephrology, male fertility, urology, 
nutritional supplements and medical foods, and medical devices.

         We currently are in discussions with a number of companies and 
organizations regarding potential product development services contracts. 
Please see "Business Risks" below for a discussion of risks associated with 
our efforts to enter into product development service contracts, including 
without limitation the risk captioned "We may not be able to attract and 
retain key employees."

SALES AND MARKETING

         In 1994, we established a Pharmaceutical Sales and Marketing 
Division to co-promote other companies' commercialized drugs as part of our 
strategy to generate non-equity funding. This Division focused on the 
neurological and psychiatric markets, in part to establish a presence in 
CoCensys' target markets in advance of CoCensys receiving FDA approval for 
marketing of any of our compounds. In October 1997, in an effort to better 
focus our resources and energies on our core competency of discovering and 
developing therapies for brain and central nervous system disorders, we sold 
the Division to Watson Pharmaceuticals, Inc.

         In the future, CoCensys has the potential opportunity, through 
collaborative relationships with Watson, to leverage the sales force and 
Watson's manufacturing capacity as CoCensys products come to market. We 
currently do not employ any sales personnel. Please see "Business Risks" 
below for a discussion of risks associated with our lack of sale force, 
including without limitation the risk captioned "We do not have a sales force 
to sell future products."

MANUFACTURING

         We currently rely on third-party manufacturers to produce our 
compounds for pre-clinical studies and clinical trials. We expect to continue 
in the foreseeable future to rely on such third-party manufacturers for 
adequate supply of products needed for subsequent clinical trials and, 
ultimately, for commercial distribution. However, there can be no assurance 
that we will be successful in arranging for adequate supplies of our products 
on acceptable terms, or at all.

         We believe that all of our compounds will be produced using 
traditional pharmaceutical synthesis. We also believe that there is currently 
adequate worldwide capacity for the production of our compounds and that 
CoCensys will be able to establish commercially reasonable arrangements for 
the long-term supply of our products for clinical trial purposes and for 
commercialization, if such compounds receive required regulatory approvals. 
Generally, the equipment required for the manufacture of our compounds is 
commercially available and is widely used in pharmaceutical industry 
operations.

         Please see "Business Risks" below for a discussion of risks 
associated with our ability to manufacture our compounds, including without 
limitation the risk captioned "We do not have manufacturing experience."


                                        13
<PAGE>

PATENTS, PROPRIETARY RIGHTS AND LICENSES

         Our success will depend in part on our ability to obtain patents, 
maintain trade secrets and operate without infringing on the proprietary 
rights of others, both in the United States and in other countries. Our 
policy is to file patent applications to protect technology, inventions and 
improvements that are important to the development of our business. We also 
rely upon trade secrets, know-how, continuing technological innovations and 
licensing opportunities to develop and maintain our competitive position.

         CoCensys files and prosecutes patent applications both on our own 
behalf and in connection with technology licensed from others. CoCensys has 
23 issued patents with expiration dates ranging from June 9, 2009 to February 
11, 2017; in addition, another 21 filed patents are pending. CoCensys has 
made related patent filings in selected foreign countries, and intends to 
file additional domestic and foreign applications as appropriate. Our patent 
applications include claims for processes, methods and therapeutic uses, as 
well as composition of matter claims for compounds which we believe are not 
naturally occurring or previously known. There can be no assurance that we 
will develop additional products or processes that are patentable, that 
patents will issue from any more of these applications, or that claims 
allowed will be sufficient to protect our technology.

         Certain of the pending, issued and allowed patents are owned by the 
University of Southern California and the Rockefeller University, the 
University of California, or the University of Oregon and have been 
exclusively licensed to CoCensys. In December 1996 (as amended December 
1997), CoCensys received an exclusive license to a patent application filed 
by Massachusetts General Hospital for the use of GABAA receptor modulators, 
including neuroactive steroids (epalons), to treat migraine. In June 1997, 
CoCensys licensed from The University of Saskatchewan, through its technology 
transfer company, University of Saskatchewan Technologies, Inc., rights to a 
class of novel, small molecule sodium channel blockers which we are 
developing to treat chronic pain and epilepsy.

         We are aware of a patent application containing claims which, if 
covered by a valid, issued patent, could block the use of our glutamate 
receptor antagonists as adjunct therapy in an indication for which we are 
currently conducting research. We also are aware of a patent that has issued 
that contains claims which may, if valid, block us from selling certain 
compounds for one particular indication not currently being pursued by 
CoCensys. If we proceed with an interference or interferences, there can be 
no assurance that we will be successful. There can be no assurance that our 
patents, if issued, would be held valid and infringed by a court of competent 
jurisdiction. An adverse outcome with regard to a third-party claim could 
subject us to significant liabilities to third parties, require disputed 
rights to be licensed from third parties or require us to cease using such 
technology.

         Please see "Business Risks" below for a discussion of risks 
associated with our intellectual property, including without limitation the 
risk captioned "Our patents and other intellectual property may not provide 
sufficient protection."

GOVERNMENT REGULATION

         Our research, pre-clinical development and clinical trials, as well 
as the manufacturing and marketing of our potential products, are subject to 
extensive regulation by governmental authorities in the United States and 
other countries. We currently are conducting clinical trials in the United 
States and Europe. Clinical trials and the marketing and manufacturing of our 

                                        14
<PAGE>

potential products will be subject to the rigorous testing and approval 
processes of the FDA and the independent processes of foreign regulatory 
authorities. The process of obtaining FDA and other required regulatory 
approvals is lengthy and expensive. We have received approvals in the past to 
conduct clinical trials for certain of our potential products and to 
manufacture the products for such trials; however, we will need to maintain 
those approvals and achieve further approvals in the future to continue to 
manufacture and test our potential products.

         Ganaxolone has been granted "orphan drug" designation by the FDA for 
the treatment of infantile spasms. Under the Orphan Drug Act, the FDA has the 
right to designate a product as an orphan drug if it addresses a "rare 
disease or condition" affecting populations of fewer than 200,000 individuals 
in the United States. The FDA can also designate a potential product as an 
orphan drug if, despite the fact that the drug treats victims of a disease 
numbering more than 200,000, the sponsor establishes that it does not 
realistically anticipate product sales will be sufficient to recover costs. 
If a product is designated an orphan drug, then the sponsor is entitled to 
receive certain incentives to undertake the development and marketing of the 
product. In addition, the sponsor that obtains the first marketing approval 
for a designated orphan drug for a given rare disease is eligible to receive 
marketing exclusivity for a period of seven years. Where appropriate, we may 
apply for orphan drug designation for other indications and/or other drug 
products.

         To market our products abroad, we also must satisfy foreign 
regulatory requirements, implemented by foreign health authorities, governing 
human clinical trials and marketing approval. In the European Union ("EU"), 
manufacturers of biotechnology products and certain high technology products 
must submit an application to the European Medicines Evaluation Agency 
("EMEA"). Approval by the EMEA will give the manufacturer access to the 
markets of all EU member states. Manufacturers of medicinal products other 
than those handled by the EMEA must utilize a "mutual recognition" procedure. 
Under this procedure, an application is made first to the medicines agency of 
any one member state, after which the approval gained in that state is used 
as the basis for a request to the other member states to recognize the first 
approval and grant a parallel authorization on the strength of that initial 
approval. Approvals in the other member states are to follow as a matter of 
course, unless there is an objection on the grounds of a safety or efficacy 
problem. In the event that such an objection is made, the issue is submitted 
to the EU's Committee on Proprietary Medicinal Products for resolution. The 
foreign regulatory approval process includes all of the risks associated with 
FDA approval set forth above. There is no assurance that the EMEA or the 
national regulatory agency in any member state will accept the data developed 
by us for any of our drug products and grant a marketing authorization.

         Please see "Business Risks" below for a discussion of risks associated
with government regulation applicable to CoCensys, including without limitation
the risk captioned "We must comply with extensive governmental regulations."

COMPETITION

         Competition for therapeutic products that address brain disorders is
intense and expected to increase. Our most significant competitors are fully
integrated pharmaceutical companies and more established biotechnology
companies. Smaller companies may also prove to be significant competitors,
particularly through collaborative arrangements with large pharmaceutical
companies. In addition, we face competition from academic institutions,
governmental agencies and other public and private research organizations that
conduct research, seek patent protection and establish 


                                        15
<PAGE>

collaborative arrangements for product and clinical development and 
marketing. Furthermore, these companies and institutions compete with us in 
recruiting and retaining highly qualified scientific and management personnel.

         Many of our competitors have substantially greater financial, 
technical and human resources and have significant products approved or in 
development. In addition, many of these competitors have significantly 
greater experience in undertaking pre-clinical testing and human clinical 
trials of new pharmaceutical products and obtaining FDA approval for 
products. Furthermore, if we are permitted to commence commercial sales of 
products, we will also be competing with respect to manufacturing efficiency 
and marketing capabilities.

         Any product that we succeed in developing and for which we gain 
regulatory approval must then compete for market acceptance and market share. 
For certain of our potential products, an important competitive factor will 
be the timing of market introduction. Accordingly, we expect that important 
competitive factors will be the relative speed with which companies can 
develop products, complete the clinical testing and approval processes and 
supply commercial quantities of the product to the market. With respect to 
clinical testing, competition may delay progress by limiting the number of 
clinical investigators and patients available to test our potential products.

         In addition to the above factors, competition is based on product 
efficacy, safety, the timing and scope of regulatory approvals, availability 
of supply, marketing and sales capability, reimbursement coverage, price and 
patent position.

HUMAN RESOURCES

         As of March 1, 1999, we had 91 full-time employees, of which 64 are 
directly involved in research and development programs and 27 provide general 
and administrative support. Our staff includes 28 employees with doctoral 
degrees, including four medical doctors. We believe our employee relations 
are good.

BUSINESS RISKS

         ANY OF THE FOLLOWING RISK FACTORS COULD MATERIALLY ADVERSELY AFFECT 
OUR BUSINESS, OPERATING RESULTS AND FINANCIAL CONDITION.

OUR PRODUCTS ARE IN AN EARLY STAGE OF DEVELOPMENT AND THERE IS A HIGH RISK OF 
FAILURE.

         We have no products that have received regulatory approval for 
commercial sale. All of our drug candidates are in the early stages of 
development, and our technology is unproven. The physiology of brain 
disorders is highly complex, and the causes of these disorders are not fully 
known. We will have to conduct significant research and pre-clinical (animal) 
and clinical (human) tests that demonstrate that our products are safe and 
effective before we can file applications for approval with the United States 
Food and Drug Administration and foreign regulatory authorities. Any of our 
products may fail in the testing phase or may fail to attain market 
acceptance. Competitors may develop superior products. Third parties may have 
proprietary rights that preclude us from marketing our products. If research 
and testing is not successful, our products are not commercially viable or we 
cannot compete effectively, our business, financial condition and results of 
operations will be materially adversely affected.



                                        16
<PAGE>


THE OUTCOME OF CLINICAL DEVELOPMENT IS HIGHLY UNCERTAIN.

         Clinical trials, including pre-clinical testing, are lengthy, 
expensive and uncertain. Failure can occur at any stage. We have no products 
that have successfully completed all necessary clinical testing. Three of our 
drug candidates have undergone some clinical testing, and three currently are 
in pre-clinical testing. We do not know whether the FDA will allow us to 
begin human testing of our drug candidates that have not been tested in 
humans or to continue human testing of those candidates that have undergone 
some human testing. We cannot rely on interim results of trials to predict 
their final results, nor can we count on acceptable results at early stages 
of testing to be repeated at later stages. Any of our drug candidates could 
have undesirable or unintended side effects or other problems that may 
prevent or limit future testing, approval or use of the product.

         We have experienced safety and efficacy problems with drug 
candidates. In a clinical trial of licostinel, our drug candidate to treat 
stroke, crystals of licostinel occurred in the urine of some subjects, a 
potential dose-limiting side effect. Although the crystal formation occurred 
only in subjects with at least four times the blood plasma level of 
licostinel that was necessary for the drug to be effective in animals, our 
development partner, Novartis Pharma A.G., ceased its participation in the 
development of licostinel. In addition, in October 1998 we announced that 
ganaxolone, our drug candidate to treat migraine and epilepsy, was not 
effective in providing relief to patients suffering migraine headaches. The 
results of a clinical trial in which 325 migraine patients received either 
ganaxolone or a placebo drug did not show a statistically significant 
difference in migraine headache relief between those patients receiving 
ganaxolone and those patients receiving the placebo.

         We cannot assure you that any of our clinical trials will be 
completed successfully or at all, or that they will result in marketable 
products. Any significant delay or failure in the clinical development of our 
products will materially adversely affect our business, financial condition 
and results of operations.

WE HAVE NEVER BEEN PROFITABLE, AND WE EXPECT TO CONTINUE TO GENERATE 
SIGNIFICANT LOSSES.

         Since we started business in 1989, we have spent over $174 million 
researching and developing our drug candidates. We have raised this money by 
selling stock in CoCensys to private investors and the public, licensing 
drugs and technologies to other companies and selling assets that we have 
developed at CoCensys. We have never been profitable and, through December 
31, 1998, we have incurred a cumulative deficit of approximately $116 million.

         We expect to continue to incur substantial and increasing losses 
over the next several years as we continue our research and development 
programs. To achieve and sustain profitable operations in the long term, we 
must successfully develop, obtain regulatory approval for, manufacture, 
introduce, market and sell drugs from our technologies. Failure to do so will 
materially adversely affect our business, financial conditions and results of 
operations.

WE WILL NEED SIGNIFICANT ADDITIONAL FUNDS.

         Drug development is capital intensive and requires significant 
funding commitments. We will need a substantial amount of funds to continue 
our operations both in the near term and over the next several years. If we 
do not raise additional funds by the end of 1999, we will be 


                                        17
<PAGE>

forced to curtail our operations. Our cash needs beyond 1999 will vary 
depending on a number of factors, including the following:

         -        the size and progress of our research and development
                  programs;

         -        the results of our animal and human testing of our drugs;

         -        the time and costs of obtaining regulatory approvals for our
                  drugs (if approvals can be achieved);

         -        how good our drugs are compared to other drugs on the market
                  that treat the same disorders;

         -        the time, costs and success of establishing sales and
                  marketing capabilities; and

         -        the time, costs and success of establishing manufacturing
                  capabilities.

         We do not know if we will be able to raise funds on terms that are 
acceptable to us. If we sell additional stock, you may experience substantial 
dilution. If we raise cash through licensing additional drugs and 
technologies to collaboration partners, we will be required to relinquish 
rights to some of our drugs and technologies.

         If we cannot raise enough cash to fund our operations, we may be 
forced to delay, reduce the scope of or eliminate one or more of our research 
or development programs. We may have to cease all operations if we are not 
successful in obtaining funds.

WE DEPEND ON THIRD PARTIES TO FUND OUR DRUG DEVELOPMENT.

         In order to fund the development, clinical testing, manufacturing 
and commercialization of our products, we have entered into various 
collaborations with corporate partners, licensors, licensees and others. 
Currently, we are a party to a collaboration agreement with Warner-Lambert 
Company for research and development of subtype-selective NMDA receptor 
antagonists and with Wyeth-Ayerst Laboratories, a division of American Home 
Products Corporation, for the development of epalons to treat anxiety. Under 
each agreement, we depend on the collaboration partner to provide the funding 
to develop drug candidates for potential approval and commercialization.

         WE MAY BE UNABLE TO FULFILL OUR OBLIGATIONS UNDER THE COLLABORATION 
AGREEMENTS. We do not know if we will have the substantial resources needed 
to fulfill our research and development obligations under each collaboration 
agreement. If we cannot fulfill our obligations, we may be required to 
terminate early one or both of the agreements and forfeit many of our rights 
under the agreements. In particular, our collaboration agreement with 
Wyeth-Ayerst provides that if the lead compound under development to treat 
anxiety fails to meet certain criteria, and if at that time we have not yet 
produced a back-up compound that meets another set of criteria, Wyeth-Ayerst 
can demand repayment of a portion of the funds paid to us under our 
collaboration agreement. Currently, the amount that we may be required to pay 
back could be as much as $3 million, in cash or common stock. Although we 
hope to fulfill our obligations under the collaboration agreement so that 
Wyeth-Ayerst will not be able to demand repayment, we cannot assure we will 
be able to do so.


                                        18
<PAGE>

         EITHER OF OUR COLLABORATION PARTNERS MAY CANCEL ITS COLLABORATION 
AGREEMENT WITH US AT ANY TIME. Each of our collaboration agreements allows 
either CoCensys or our collaboration partner to voluntarily terminate its 
participation in the collaboration at any time. If either of our current 
collaboration partners terminates its agreement with us, that partner would 
lose its right to further develop or sell drugs under that collaboration; 
however, that partner also no longer would be required to fund development of 
those drugs. If either Warner-Lambert or Wyeth-Ayerst cancels its agreement 
with us, we would have to find a new collaboration partner to pay for further 
development of our drug candidates. We cannot assure you that we would be 
able to do so. Collaboration partners have, in the past, terminated their 
agreements with us. In 1994, we entered into a development agreement with 
Novartis Pharma A.G. to develop licostinel to treat stroke patients. In 1997, 
Novartis terminated its participation in the development agreement based on 
side effects seen in human trials of licostinel. Also, in 1996, we entered 
into an agreement with G.D. Searle & Co. to develop epalons to treat 
insomnia. In July 1998, Searle terminated its participation in that 
agreement, stating that the program no longer met its needs in light of its 
entire product pipeline. Since termination of those two agreements, we have 
not yet found new collaboration partners to develop those drugs, and we do 
not have the money to complete development of those drugs. We do not know if 
we will be able to find new collaboration partners for those drugs.

         WE MAY BE UNABLE TO ENTER INTO COLLABORATION AGREEMENTS IN THE 
FUTURE. We plan to continue to enter into collaboration agreements with 
pharmaceutical companies to develop, market and sell our drug candidates. We 
do not know if we will be able to find additional potential partners 
interested in developing our drugs. Also, even if we find potential partners 
interested in our drugs, we do not know if we will be able to enter into 
collaboration agreements with these partners on terms and conditions that we 
find acceptable. Even if we do enter into additional collaboration 
agreements, we do not know if the collaborations will successfully develop 
drugs for marketing and sale. If we are unable to secure collaboration 
partners, we will not be able to develop our drug candidates.

WE MUST COMPLY WITH EXTENSIVE GOVERNMENTAL REGULATIONS.

         Our drug candidates are subject to extensive and rigorous regulation 
by the FDA and state and local bodies in the United States and by foreign 
regulatory authorities. These regulations cover, among other things, product 
development, testing, manufacturing, labeling, sales, advertising and 
promotion. The process of obtaining FDA and other required regulatory 
approvals is long, expensive and uncertain. In order to market and sell our 
drugs in the United States and other countries, we must successfully complete 
rigorous testing in animals and humans to prove that the drugs are safe for 
human use and are effective in treating one or more specific brain disorders. 
We must conduct these tests in a large number of people, including both 
healthy volunteers and people who suffer from the disorder for which the drug 
is intended. All of our testing must be conducted strictly in accordance with 
standards set up by the FDA and foreign regulators. If we successfully 
complete those tests for one of our drugs, we then must go through an 
extensive regulatory approval process with the FDA, and with foreign 
regulators, before we can begin marketing and selling the drug.

         Even if our drugs are approved for marketing and sale, the FDA and 
foreign regulators may place limitations on the marketing and sale of our 
drugs or require that we conduct additional testing on any or all of our 
drugs after the drugs are approved for marketing and sale. In addition, each 
drug, the manufacturer of that drug and the manufacturing facilities in which 
the drug is made are subject to continual review and periodic inspections. 
The FDA and 


                                        19
<PAGE>

regulatory agencies in other countries have the right to withdraw approval 
for a drug later if, for example, patients taking our drug experience serious 
side effects or we have problems in manufacturing the drug.

         We do not know if we will successfully complete the required testing 
with any of our drug candidates. Any of our drugs may have unacceptable side 
effects or may not be effective in treating the targeted brain disorder. We 
may have difficulty recruiting healthy or sick volunteers for our trials. 
Either CoCensys or the FDA can halt a trial at any time if either of us 
believes that the participants in the trial are being exposed to unacceptable 
health risks. Even if we do successfully complete the testing for one or more 
of our drugs and prove that our drug is safe for human use and is effective 
in treating one or more specific brain disorders, we do not know if the FDA 
or any other country's regulatory agency will approve the drug for marketing 
and sale in that country. We cannot be sure that our drug candidates will 
receive FDA approval in a timely manner, if at all. Regulatory agencies may 
limit the uses, or indications, for which any of our products is approved. 
Even if approvals are obtained, the marketing and manufacturing of drug 
products are subject to continuing FDA and other regulatory requirements, 
such as requirements to comply with good manufacturing practices. The failure 
to comply with such requirements could result in enforcement action, which 
could adversely affect us and our business. Later discovery of problems with 
a product, manufacturer or facility may result in additional restrictions on 
the product or manufacturer, including withdrawal of the product from the 
market. The government may impose new regulations which could further delay 
or preclude regulatory approval of our drug candidates. We cannot predict the 
impact of adverse governmental regulation which might arise from future 
legislative or administrative action. Also, we conduct testing on our drugs 
both in the United States and in other countries (principally European 
countries). The FDA in the United States and regulatory agencies in other 
countries may be unwilling to accept the results from trials not conducted in 
that agency's "home" country.

OUR PATENTS AND OTHER INTELLECTUAL PROPERTY MAY NOT PROVIDE SUFFICIENT 
PROTECTION.

         Our success depends in part on our ability to protect our technology 
from unauthorized use by obtaining patents in the United States and other 
countries and maintaining our trade secrets. Also, our drug candidates must 
not infringe on the patent and other proprietary rights of others in the 
United States and other countries where we may market and sell them. We work 
hard to obtain appropriate patents and to maintain our trade secrets; 
however, patents can be highly uncertain and involve complex legal and 
factual questions. We do not know if our patent protection and trade secret 
protection will be sufficient to allow CoCensys and our development partners 
to develop, market and sell our drug candidates.

         We file and prosecute patent applications on our own behalf and in 
connection with technology that we have licensed from third parties. We have 
been issued 23 patents in the United States for our technologies, with 
expiration dates ranging from June 9, 2009 to February 11, 2017, and another 
21 filed patents are pending. We have also filed for patent protection in 
selected foreign countries. We will continue to file and prosecute patent 
applications in the United States and in other countries to protect our drug 
candidates, but we do not know if we will be issued additional patents for 
our technologies, either in the United States or in other countries. We also 
do not know if we will invent any new products or processes for which we can 
receive patent protection in the future.

         The United States Patent and Trademark Office and similar agencies 
in other countries have substantial backlogs of patent applications waiting 
for consideration. In the United States, 


                                        20
<PAGE>

patent applications remain secret until the patent is issued; in other 
countries, patent applications remain secret for at least six months after 
filing. Therefore, we do not know whether any of our competitors has filed 
patents that may interfere with our ability to gain patent protection for our 
discoveries. We do not know whether our competitors may have invented some of 
our technology prior to the time that we invented the technology. Generally, 
only the person who first invents technology is entitled to a patent for that 
technology. Even if we are the first to invent certain technology and we have 
filed a patent application, we do not know when that application will be 
considered by the United States Patent and Trademark Office or any agency in 
other countries where we may have filed a patent application for the 
technology.

         Patents that have been issued to us are always subject to being 
challenged, invalidated or circumvented; we do not know if any of our patents 
or patents in which we have rights will provide adequate protection for 
CoCensys. Also, we may have to participate in litigation or interference 
proceedings to determine whether one or more of our patents is valid. Even if 
we win the litigation or interference proceeding, we may be required to spend 
substantial amounts of money defending the validity of our patents. We do not 
know if we will have sufficient money to defend all of our patents if they 
are challenged.

         Our success will also depend, in part, on our not infringing patents 
issued to others. We do not know if any patents held or patent applications 
filed by other people or companies will force us to alter our drug candidates 
or processes, stop development of one or more of our drug candidates or 
obtain licenses, if possible, from those other people or companies.

         A number of pharmaceutical companies, biotechnology companies, 
universities and research institutions have filed patent applications or 
received patents that may be competitive with the our patents and patent 
applications. We do not know the effect that those patents and patent 
applications may have on our ability to continue to develop and, eventually, 
market and sell our drug products. If we attempt to obtain licenses to use 
patents held by other people, we do not know if we will be granted licenses 
or whether the terms of those licenses, if granted, will be fair and 
acceptable to CoCensys.

         If we infringe another person's patent, or we fail to obtain an 
appropriate license to use any other person's technology that is required to 
develop, market and sell our drug products, we may have to participate in 
interference proceedings or litigation, which could result in substantial 
costs, fines and penalties assessed against CoCensys and we may be forced to 
cease all use of the other person's technology. In fact, we are aware of a 
patent that has issued that contains claims that may, if valid, block us from 
selling certain compounds for one particular indication. Although we are not 
currently pursing that indication for those compounds, if we do decide to 
pursue that indication, we will have to either institute an interference 
proceeding to determine the validity of the other patent or attempt to 
license rights to the patent from the holder. We do not know if we will be 
successful if we decide to institute an interference proceeding. Also, we do 
not know if the patent holder would be willing to license us rights to the 
patent, whether or not on terms acceptable to CoCensys.

         We have developed a substantial amount of information constituting 
our trade secrets. We rely on confidentiality agreements with our employees, 
consultants and certain contractors to protect these trade secrets. We do not 
know if the other parties to these agreements will abide by the agreements or 
breach them. If any agreement is breached, we do not know whether we will be 
able to adequately protect CoCensys from damage caused by our trade secrets 
being disclosed to the public or to a competitor.


                                        21
<PAGE>

WE FACE SIGNIFICANT COMPETITION.

         We are engaged in a highly competitive, rapidly changing field. 
Existing products and therapies, as well as those under development by other 
companies, will compete directly with products that we are seeking to develop 
and market. Competition from fully integrated pharmaceutical companies, 
including larger biotechnology companies and our collaboration partners, is 
intense and is expected to increase. Most of these companies have 
significantly greater financial resources and expertise than we do in 
research and development, manufacturing, pre-clinical and clinical testing, 
obtaining regulatory approvals, marketing and distribution. Many of our 
competitors also have significant products to treat neurological and/or 
psychiatric disorders approved or in development and operate large, 
well-funded research and development programs. Academic institutions, 
governmental agencies and other public and private research organizations 
also conduct research, seek patent protection and establish collaborative 
arrangements for product and clinical development and marketing. Further, we 
face competition based on product efficacy, safety, the timing and scope of 
regulatory approvals, availability of supply, marketing and sales capability, 
reimbursement coverage, price and patent position. We do not know whether our 
competitors will be able to develop more effective or more affordable 
products, or achieve earlier patent protection or product commercialization 
than us. If we are unable to compete successfully, our business, financial 
condition and results of operations will be materially adversely affected.

WE MAY NOT BE ABLE TO ATTRACT AND RETAIN KEY EMPLOYEES.

         We are highly dependent on the key members of our scientific and 
management staff. If we lost the services of one or more key people, we may 
experience significant delays in our development programs. In addition, we 
rely on consultants and advisors to assist us in conducting our operations 
and formulating our research and development strategy. Attracting and 
retaining qualified personnel, consultants and advisors is critical to our 
success. We compete with pharmaceutical companies, biotechnology companies, 
universities and other entities and institutions in recruiting and retaining 
highly qualified scientific and management personnel. We do not know if we 
will be able to attract and retain qualified personnel on acceptable terms or 
at all.

WE DO NOT HAVE MANUFACTURING EXPERIENCE.

         We do not have any manufacturing facilities. We rely solely on 
contract manufactures to produce supplies of our compounds and, at this time, 
we likely will be forced to rely on contract manufactures to produce 
commercial supplies of any of our drug candidates that are approved for 
marketing and sale. We do not know whether our drugs can be manufactured in 
commercial quantities at an acceptable cost.

         In addition, we must rely on contractors for packaging, labeling and 
distribution of our drug products. We do not know if we will be able to enter 
into agreements for these services on terms acceptable and fair to us. We do 
not know if our contractors will perform all of their obligations on time and 
in an acceptable manner. Delays or defaults by our contractors could delay or 
jeopardize our efforts to develop, market and sell our drug products. 
Moreover, our contract manufacturers must adhere to current good 
manufacturing practice regulations enforced by the FDA through its facilities 
inspection program. We do not know if the facilities that we use will pass 
FDA inspections. Failure to pass inspections could delay or jeopardize our 
ability 


                                        22
<PAGE>

to market and sell any future products and materially adversely affect our 
business, financial condition and results of operations.

WE DO NOT HAVE A SALES FORCE TO SELL FUTURE PRODUCTS.

         We sold our Pharmaceutical Sales and Marketing Division to Watson 
Pharmaceuticals in 1997. To market products in the future, we must develop or 
acquire, and thereafter maintain and expand, a new sales and marketing 
organization with technical expertise and supporting distribution capability. 
We do not know if we will be successful developing or acquiring and, 
thereafter, maintaining and expanding an appropriate sales and marketing 
organization. Any failure on our part may have a material adverse effect on 
our business, financial conditions and results of operations.

WE DO NOT KNOW IF OUR PRODUCTS WILL BE COMMERCIALLY SUCCESSFUL OR REIMBURSED 
BY THIRD-PARTY PAYORS.

         Even if one or more of our products prove safe and effective, we do 
not know if the products will be successful commercially. For example, our 
products may be too difficult or expensive to make, or our products may not 
be acceptable to patients, health care providers and third-party payors. In 
both the United States any many foreign countries, sales of our products, if 
any, will depend in part on the availability of reimbursement from 
third-party payors, such as government health administration authorities, 
private health insurers and other organizations. Third-party payors are 
increasingly challenging the price and cost-effectiveness of medical products 
and services. We do not know whether our drug products will be considered 
cost effective or that adequate third-party reimbursement will be available 
to enable us to maintain price levels sufficient to realize an appropriate 
return on our investment in product development. In certain foreign 
countries, our products may be subject to governmentally mandated prices. If 
governments and third-party payors do not provide adequate reimbursement for 
our potential drug products or if foreign governments force unreasonably low 
pricing for our drugs, our business, financial condition and results of 
operations may be materially adversely affected.

WE ARE SUBJECT TO SUBSTANTIAL PRODUCT LIABILITY RISKS.

         Our business exposes us to potential product liability risks if any 
of our compounds or future products cause illness, injury or death. Although 
we currently have liability insurance covering our clinical trials, our 
coverage may not be sufficient to cover all potential claims. We do not know 
if we will be able to obtain and maintain such insurance for all of our 
clinical trials and future products. We will need to increase our insurance 
coverage in the future if we begin to market and sell any of our drug 
products under development. However, we do not know if we will be able to 
obtain or maintain product liability insurance in the future on acceptable 
terms or with adequate coverage against potential liabilities. A liability 
claim, regardless of merit or eventual outcome, could materially adversely 
affect our business, financial condition and results of operations.

OUR STOCK PRICE IS VERY VOLATILE.

          The securities markets have from time to time experienced 
significant price and volume fluctuations that may be unrelated to the 
operating performance of particular companies. In addition, the market prices 
of the common stock of many publicly traded biopharmaceutical companies, 
including ours, have in the past been, and can in the future be expected to 
be, 


                                        23
<PAGE>

especially volatile. Our stock price may fluctuate greatly as a result of a 
number of factors, including:

         -        announcements of technological innovations or new products by
                  us or by our competitors;

         -        developments or disputes concerning patents or proprietary
                  rights;

         -        publicity regarding actual or potential medical results
                  relating to drug products that we or our competitors are
                  developing;

         -        regulatory developments in both the United States and foreign
                  countries;

         -        public concern as to the safety of biotechnology products; and

         -        economic and other external factors, as well as
                  period-to-period fluctuations in our financial results.

         THE SALE OF A LARGE NUMBER OF SHARES OF OUR COMMON STOCK MAY FURTHER
DEPRESS OUR STOCK PRICE.

         The sale of a large number of shares of our common stock in the 
public could depress the market price of our common stock. Substantially all 
of the outstanding shares of our common stock may be sold at any time in the 
public markets. Approximately 5.2 million freely tradable additional shares 
may be issued on exercise of vested options to purchase CoCensys stock. 
Current and former employees, consultants, officers and directors of CoCensys 
hold these options.

         We may be required to issue millions of additional shares of 
CoCensys common stock upon conversion of Series E Convertible Preferred 
Stock. As of March 1, 1999, 5,135 shares of our Series E Convertible 
Preferred Stock remained issued and outstanding. Each share of the Series E 
Convertible Preferred Stock is convertible into shares of CoCensys common 
stock at discount to the current market price of our common stock. If 
converted on March 1, 1999, based on the then-applicable conversion price of 
$0.197 per share, the remaining Series E Convertible Preferred Stock would 
have been convertible into approximately 27.5 million additional shares of 
CoCensys common stock. The number of shares of common stock that may be 
issued could prove to be significantly greater if the market price of our 
common stock declines. CoCensys stockholders could experience substantial 
dilution from issuance of additional common stock on conversion of the Series 
E Convertible Preferred Stock.

         In addition, we may be required to issue millions of additional 
shares of CoCensys common stock on fulfillment of our obligation to 
Warner-Lambert Company. Under our collaboration agreement with 
Warner-Lambert, we owe Warner-Lambert $1 million on December 31, 1999. The $1 
million is payable in common stock or cash, at the election of 
Warner-Lambert. If the amount had been paid on March 1, 1999, and 
Warner-Lambert elected to receive the payment in stock, we would have had to 
issue to Warner-Lambert approximately 3.2 million shares of common stock. The 
number of shares of common stock that may be issued could prove to be 
significantly greater if the market price of our common stock declines. 
CoCensys stockholders could experience substantial dilution from issuance of 
additional common stock in satisfaction of our obligation to Warner-Lambert.


                                        24
<PAGE>

FAILURE TO MAINTAIN OUR LISTING ON THE NASDAQ NATIONAL MARKET MAY ADVERSELY 
AFFECT THE LIQUIDITY OF OUR COMMON STOCK AND OUR FINANCIAL CONDITION.

         Our common stock is traded on the Nasdaq National Market under the 
symbol "COCN." In order to maintain our listing on the Nasdaq National 
Market, we must meet a number of listing requirements established by Nasdaq. 
Currently, we meet all Nasdaq National Market requirements other than the 
minimum bid price. Generally, we must maintain a minimum bid price of $1.00 
per share; however, our bid price is significantly below $1.00 per share and 
has been below $1.00 per share since October 1998.

         On December 1, 1998, Nasdaq informed us that our common stock would 
be delisted on March 1, 1999 if we failed to have a closing bid price of at 
least $1.00 per share for ten consecutive days on or before February 28, 
1999. We have been unable to achieve that closing bid price; however, we have 
applied for a hearing before Nasdaq to discuss our delisting. That hearing is 
scheduled for April 29, 1999. While the hearing is pending, Nasdaq has said 
that it will not take further action to delist our common stock from the 
Nasdaq National Market as a result of our stock price.

         On January 27, 1999, CoCensys stockholders approved a reverse split 
of our common stock, subject to the Board of Director's right not to 
implement the reverse split, in the alternative ratios of one share for six 
shares, one for seven, or one for eight. CoCensys will consider implementing 
the reverse stock split as necessary to increase the per share price of 
CoCensys common stock in an effort to avoid delisting.

          If we cannot maintain continued listing of our common stock on the 
Nasdaq National Market or the Nasdaq SmallCap Market, our common stock could 
trade on the OTC Bulletin Board or in the over-the-counter market in what is 
commonly referred to as the "pink sheets." If this occurs, a stockholder will 
find it more difficult to dispose of the securities or to obtain accurate 
quotations as to the price of the securities. In addition, our common stock 
could become subject to the "penny stock" regulations of the SEC, which 
impose additional restrictions on broker-dealers who trade in such stock and 
could severely limit the liquidity of our common stock. If we do not maintain 
our listing on the Nasdaq National Market or Nasdaq SmallCap, we may be 
required to redeem our Series E Convertible Preferred Stock. Redemption of 
the Series E Convertible Preferred Stock would significantly deplete our cash 
reserves and materially adversely affect our operations and financial 
condition.

WE GENERATE HAZARDOUS MATERIALS IN OUR BUSINESS AND OPERATIONS.

         Our research and development involves the controlled use of 
hazardous materials, chemicals and various radioactive compounds. Although we 
believe that our safety procedures for handling and disposing of such 
materials comply with the standards prescribed by state and federal 
regulations, the risk of accidental contamination or injury from these 
materials cannot be completely eliminated. If an accident occurs, we could be 
held liable for any damages that result and any such liability could exceed 
our resources. Also, we may incur substantial costs to comply with 
environmental regulations if we ever decide to develop manufacturing capacity.


                                        25
<PAGE>


ITEM 2.     PROPERTIES

         Our administrative offices and research facilities are currently 
housed in two adjacent buildings occupying approximately 54,700 square feet 
of leased space in Irvine, California. The lease on these facilities expires 
in 2002, subject to our earlier right to terminate, and contains provisions 
for one five-year renewal option.

ITEM 3.     LEGAL PROCEEDINGS

         We know of no pending or threatened material litigation or 
proceedings involving CoCensys.

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

         During the fourth quarter of 1998, no matters were submitted to a 
vote of the stockholders. Subsequent to year end, CoCensys held a Special 
Meeting of Stockholders. At the Special Meeting, which was held on January 
27, 1999, a total of 19,363,818 shares were voted in person or by proxy, 
representing 71% of the December 11, 1998 record date total of 27,280,949 
shares eligible to vote. The stockholders approved the following resolutions 
(votes not listed include broker non-votes and other non-votes):

         Proposal 1: To approve the issuance by the Company from time to time of
         shares of its Common Stock on conversion of shares of the Company's
         Series E Convertible Preferred Stock and exercise of warrants issued in
         connection with such Series E Convertible Preferred Stock.

         Shares for: 6,441,294  Shares against: 1,442,242 Abstentions: 54,499

         Proposal 2-A: To amend the Amended and Restated Certificate of
         Incorporation, as amended, to effect a one for six reverse stock split,
         subject to the right of the Board of Directors to abandon the amendment
         prior to filing it with the Delaware Secretary of State.

         Shares for: 18,394,774  Shares against: 869,809   Abstentions: 42,925

         Proposal 2-B: To amend the Amended and Restated Certificate of
         Incorporation, as amended, to effect a one for seven reverse stock
         split, subject to the right of the Board of Directors to abandon the
         amendment prior to filing it with the Delaware Secretary of State.

         Shares for: 18,394,774  Shares against: 869,809   Abstentions: 42,925

         Proposal 2-C: To amend the Amended and Restated Certificate of
         Incorporation, as amended, to effect a one for eight reverse stock
         split, subject to the right of the Board of Directors to abandon the
         amendment prior to filing it with the Delaware Secretary of State.

         Shares for: 18,394,774  Shares against: 869,809   Abstentions: 42,925


                                        26

<PAGE>

                                     PART II


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

a)       MARKET INFORMATION

         The Company's Common Stock, par value $ .001 per share, trades on the
Nasdaq National Market under the symbol "COCN." The following table presents
quarterly information on the price range of the Company's Common Stock. This
information indicates the high and low sale prices reported by the Nasdaq
National Market. These prices do not include retail markups, markdowns or
commissions.

<TABLE>
<CAPTION>
                                                       HIGH                LOW
                                                    ----------          ---------- 
<S>                                                 <C>                 <C>
1997
    First quarter                                     $   7.88           $   4.50
    Second quarter                                    $   5.88           $   2.69
    Third quarter                                     $   6.25           $   2.88
    Fourth quarter                                    $   6.06           $   2.94

1998
    First quarter                                     $   4.50           $   2.88
    Second quarter                                    $   3.63           $   2.06
    Third quarter                                     $   2.69           $   0.88
    Fourth quarter                                    $   2.25           $   0.25
</TABLE>

b)       HOLDERS

         As of March 17, 1999 there were 400 holders of record of the Company's
Common Stock.

c)       DIVIDENDS

         The Company has not paid any dividends on its Common Stock since its
inception and does not intend to pay any dividends on its Common Stock in the
foreseeable future.

d)       RECENT SALES OF UNREGISTERED SECURITIES

         Pursuant to the terms of the Series E Convertible Preferred Stock
issued in June 1998, on November 4, 1998, the Company issued additional warrants
to the original investors to purchase 100,000 shares of common stock. The
warrants are exercisable into Common Stock at $0.63 per share and expire in
November 2002. The issuance was exempt from registration under section 4(2) of
the Securities Act of 1933, as amended, as a transaction not involving any
public offering.


                                        27
<PAGE>


ITEM 6.            SELECTED FINANCIAL DATA

The following table summarizes selected consolidated financial data. Certain
reclassifications have been made to prior year data to conform to the 1998
presentation.

<TABLE>
<CAPTION>
                                                                   YEAR ENDED DECEMBER 31,               
                                            -------------------------------------------------------------------
                                                1998          1997          1996          1995          1994   
                                            -----------   -----------   -----------    ----------    ----------
                                                          (In thousands, except per share data)
<S>                                         <C>           <C>           <C>            <C>           <C>
STATEMENT OF OPERATIONS DATA:
Revenues:
   Co-promotion revenues                    $       540   $     3,264   $     9,085    $   10,414    $    7,402
   Co-development revenues                        2,046         8,650         6,073         1,970             -
                                            -----------   -----------   -----------    ----------    ----------
Total revenues                                    2,586        11,914        15,158        12,384         7,402

Operating expenses:
   Research and development                      15,745        23,308        20,949        17,662        11,569
   Marketing, general and administrative          3,894         9,975        13,862        13,383         7,673
   Acquired research and development                  -                       -             -            14,879
                                            -----------   -------------------------    ----------    ----------
Total operating expenses                         19,639        33,283        34,811        31,045        34,121
                                            -----------   -----------   -----------    ----------    ----------
Operating loss                                  (17,053)      (21,369)      (19,653)      (18,661)      (26,719)
                                            -----------   -----------   -----------    ----------    ----------
   Gain on disposition of sales force (1)         1,000         4,728             -             -             -
   Interest income                                  908           898         1,304           717           373
   Interest expense                                 (81)          (78)         (139)         (178)         (240)
                                            -----------   -----------   -----------    ----------    ----------
Net loss                                        (15,226)      (15,821)      (18,488)      (18,122)      (26,586)
Dividends on preferred stock                      1,942             -             -             -             -
                                            -----------   -----------   -----------    ----------    ----------
Net loss attributable to
   common shareholders                      $   (17,168)  $   (15,821)  $   (18,488)   $  (18,122)   $  (26,586)
                                            -----------   -----------   -----------    ----------    ----------
                                            -----------   -----------   -----------    ----------    ----------

Basic and diluted loss per share (2)        $    (0.70)   $     (0.70)  $     (0.85)   $      (1.05) $    (2.33)
                                            -----------   -----------   -----------    ----------    ----------
                                            -----------   -----------   -----------    ----------    ----------
Shares used in computing basic
   and diluted loss per share                    24,524        22,574        21,783        17,288        11,406
                                            -----------   -----------   -----------    ----------    ----------
                                            -----------   -----------   -----------    ----------    ----------

                                                                        DECEMBER 31,                           
                                            -------------------------------------------------------------------
                                                1998          1997          1996          1995          1994   
                                            ------------  -----------   -----------    ----------    ----------
                                                                                          (In thousands)
BALANCE SHEET DATA:
Cash, cash equivalents and
   investments                              $    12,195   $    12,960   $    17,999    $   13,449    $    8,924
Working capital                                   5,315         8,374        14,434         6,753         3,766
Total assets                                     15,099        16,916        22,051        18,201        15,216
Long-term obligations                               392         1,101           324           406           696
Accumulated deficit                            (116,151)      (98,983)      (83,162)      (64,674)      (46,552)
Total stockholders' equity                        7,506        10,831        16,947        10,644         8,547

</TABLE>

 (1)In October 1997, the Company sold its sales and marketing force as discussed
in Note 4 to the Financial Statements.
 (2)The earnings per share amounts prior to 1997 have been restated as required
to comply with Statement of Financial Accounting Standard No. 128, "Earnings per
Share" ("SFAS No. 128"). For further discussion of earnings per share and the
impact of SFAS No. 128, see the Notes to Financial Statements.

                                        28
<PAGE>



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


THE FOLLOWING DISCUSSION CONTAINS, IN ADDITION TO HISTORICAL INFORMATION,
CERTAIN FORWARD-LOOKING STATEMENTS THAT INVOLVE RISKS AND UNCERTAINTIES. THE
COMPANY'S ACTUAL RESULTS COULD DIFFER MATERIALLY. FACTORS THAT COULD CAUSE OR
CONTRIBUTE TO SUCH DIFFERENCES INCLUDE, BUT ARE NOT LIMITED TO, THOSE DISCUSSED
BELOW AND ELSEWHERE IN THIS REPORT.


OVERVIEW

         Since its inception in February 1989, the Company has devoted 
substantially all of its resources to the discovery and development of 
pharmaceutical products for the treatment of disorders affecting the brain. 
The Company has incurred losses since inception and expects losses to 
continue for the foreseeable future, primarily due to the expansion of 
programs for research and development. Operating results are expected to 
fluctuate as a result of uncertainty in the timing and amount of expenses for 
product development and in the timing and amount of revenues to be earned 
from the achievement of research and development milestones and sales of 
Company products, if any. As of December 31, 1998, the Company's accumulated 
deficit was approximately $116.2 million.

RESULTS OF OPERATIONS

1998 AS COMPARED TO 1997

         The Company's revenues consist of co-promotion revenues and 
co-development revenues. Co-promotion revenues arose from contractual 
agreements that called for the Company to promote other pharmaceutical 
companies' products in return for commissions. Co-development revenues arise 
from contractual agreements with large pharmaceutical companies pursuant to 
which the Company licenses various commercialization or development rights 
relating to compounds or performs research activities in exchange for 
licensing fees, milestone payments or research funding. In October 1997, the 
Company sold its sales and marketing force to Watson Pharmaceuticals, Inc. 
("Watson") and, except for certain residual items recognized in fiscal 1998, 
is no longer involved in co-promotional activities.

         CO-PROMOTION REVENUES were $540,000 for the year ended December 31, 
1998, compared to $3.3 million in fiscal 1997. Co-promotion revenues in 1998 
resulted from a bonus related to fiscal 1997 activity that was received and 
recognized in the first quarter of 1998.

         CO-DEVELOPMENT REVENUES were $2.0 million for the year ended 
December 31, 1998, compared to $8.6 million in 1997. The decrease in 
co-development revenues of $6.6 million, or 77 percent, compared to the prior 
year resulted primarily from an agreement with the Wyeth-Ayerst Laboratories 
Division of American Home Products Corporation in May 1997, which provided 
for a one-time license fee of $5.0 million plus an additional $2.2 million 
during 1997 to fund research on a back-up compound in connection with the 
Company's anxiolytic program.


                                        29
<PAGE>

         RESEARCH AND DEVELOPMENT expenses were $15.7 million in fiscal 1998 
compared to $23.3 million in 1997. This decrease of $7.6 million, or 32 
percent, is attributable to a lower level of external clinical trials and 
certain headcount reductions in the current year in comparison to the prior 
year. In fiscal 1997, the Company made significant external expenditures for 
the development of compounds treating epilepsy, migraine, acute stroke and 
insomnia. In fiscal 1998, external expenditures were focused on clinical 
trials of the Company's compound to treat acute migraine and on preclinical 
testing of the Company's compound to treat neuropathic pain.

         MARKETING, GENERAL AND ADMINISTRATIVE expenses were $3.9 million in 
fiscal 1998 compared to $10.0 million in 1997. This decrease of $6.1 million, 
or 61 percent, is due to the disposition of the sales and marketing division 
in October 1997. As a result of this transaction, the Company incurred nine 
months of expense associated with the sales function in fiscal 1997 compared 
to no expense in fiscal 1998.

         GAIN ON DISPOSITION OF SALES FORCE was $1.0 million in fiscal 1998 
compared to a gain of $4.7 million in 1997. The fiscal 1998 gain related to 
two deferred payments that were based on Watson's ability to retain certain 
percentages of the sales and marketing force at specified dates subsequent to 
the sale. No further payments are due to the Company from Watson.

         DIVIDENDS ON PREFERRED STOCK were $1.9 million in fiscal 1998 
whereas no dividends were recorded in the prior fiscal year. Of the fiscal 
1998 total, $562,000 related to dividends on the Company's Series D 
Convertible Preferred Stock issued in October 1997 and January 1998 to 
Warner-Lambert Company ("Warner-Lambert") in connection with a research and 
development program, and $1,381,000 related to the Company's Series E 
Convertible Preferred Stock issued in June 1998 to private investors. All 
dividends result in an increase in the value of outstanding preferred stock 
and do not involve the payment of any cash.

1997 AS COMPARED TO 1996

         CO-PROMOTION REVENUES were $3.3 million for the year ended December 
31, 1997, compared to $9.1 million in fiscal 1996. This $5.8 million, or 64 
percent, decrease in 1997 compared to 1996 resulted from the termination of 
the Novartis Pharma, A.G. ("Novartis") co-promotion agreement in December 
1996, the loss of co-promotion rights for Cognex(R) in June 1997 and the sale 
of the sales and marketing division in October 1997.

         CO-DEVELOPMENT REVENUES were $8.6 million for the year ended 
December 31, 1997, compared to $6.1 million in 1996. This $2.5 million, or 41 
percent, increase in 1997 is primarily attributable to the May 1997 agreement 
with the Wyeth-Ayerst mentioned above. In fiscal 1996, the Company recognized 
$3.6 million related to the G.D. Searle & Co. ("Searle") Development and 
Commercialization Agreement in connection with its insomnia program and $2.5 
million related to the Novartis Research and Development Agreement in 
connection with its compound to treat stroke and traumatic brain injury. The 
program with Searle was terminated in July 1998 and the program with Novartis 
was terminated effective October 1997.

         RESEARCH AND DEVELOPMENT expenses were $23.3 million in fiscal 1997 
compared to $20.9 million in 1996. This increase of $2.4 million, or 11 
percent, is attributable to a higher level of clinical activity in the fiscal 
1997 in comparison to fiscal 1996. During 1997, the Company conducted 
significant clinical trials for ganaxolone in the treatment of migraine and 


                                        30
<PAGE>

epilepsy, licostinel in the treatment of stroke and CCD 3693 in the treatment 
of insomnia. During 1996, clinical activities were focused mainly on 
licostinel for the treatment of stroke and, to a lesser extent, ganaxolone 
for the treatment of epilepsy.

         MARKETING, GENERAL AND ADMINISTRATIVE expenses were $10.0 million in 
fiscal 1997 compared to $13.9 million in 1996. This decrease of $3.9 million, 
or 28 percent, is due to the disposition of the sales and marketing division 
in October 1997. As a result of this transaction, the Company incurred nine 
months of expense associated with the sales function in fiscal 1997 compared 
twelve months of expense in fiscal 1996.

         GAIN ON DISPOSITION OF SALES FORCE was $4.7 million in fiscal 1997.
This amount relates entirely to the sale of the sales and marketing force
to Watson.

LIQUIDITY AND CAPITAL RESOURCES

         From its inception in February 1989 through December 31, 1998, the 
Company has financed its operations primarily through private and public 
offerings of its equity securities, raising net proceeds of approximately 
$102.1 million through sales of these securities. At December 31, 1998, the 
Company's balances of cash, cash equivalents and investments totaled $12.2 
million, compared to $13.0 million at December 31, 1997.

         As of December 31, 1998, the Company had invested $7.7 million in 
leasehold improvements, laboratory and computer equipment and office 
furnishings and equipment. The Company has financed $3.6 million of these 
capital additions through capital lease lines. In addition, the Company 
leases its laboratory and office facilities under operating leases. While 
additional equipment will be needed as the Company increases its research and 
development activities, the Company has no material commitments for the 
acquisition of property and equipment.

          On June 8, 1998, the Company issued 8,000 shares of Series E 
Convertible Preferred Stock with a stated value of $1,000 per share for an 
aggregate of $8 million in a private placement pursuant to Regulation D of 
the Securities Act of 1933, as amended. See Note 2 of the Notes to Financial 
Statements "Private Placement of Preferred Stock," below.

          Pursuant to an agreement with Watson, in October 1997, the Company 
sold it sales and marketing force, related co-promotion agreements and 
certain other assets to Watson for $8.0 million in cash with an additional 
$1.0 million due to CoCensys contingent upon the occurrence of specified 
events. Of this contingent amount, Watson paid the Company $750,000 in April 
1998 and $250,000 in October 1998.

          Pursuant to the 1995 collaboration agreement with Warner-Lambert, 
as amended and extended in October 1997, Warner-Lambert is obligated to make 
certain milestone payments for each compound selected for development, as 
well as pay for its share of development costs. Under the terms of the 1995 
agreement, Warner-Lambert purchased $2.0 million of CoCensys Common Stock in 
October 1995 and an additional $2.0 million of CoCensys Common Stock in March 
1997. Under the terms of the 1997 amendment, Warner-Lambert purchased 
preferred stock with a face value of $7.0 million, of which Warner-Lambert 
paid the Company $1.0 million in October 1997 and $6.0 million in January 
1998. Of this $7.0 million in total proceeds, the 


                                        31
<PAGE>

Company has allocated $1.6 million to be recognized as co-development revenue 
during fiscal 1998, $4.4 million as preferred stock and $1.0 million as a 
liability (payable in cash or common stock at the election of Warner-Lambert) 
due to Warner Lambert on December 31, 1999. The preferred stock accrues an 
imputed non-cash dividend at 12 percent per annum until its mandatory 
conversion date in October 2001.

         Pursuant to the May 1997 Development and Commercialization Agreement 
with Wyeth-Ayerst, Wyeth-Ayerst paid the Company a $5.0 million license fee 
and purchased 100,000 shares of the Company's Series C Convertible Preferred 
stock for $5.0 million. Furthermore, Wyeth-Ayerst is obligated to pay all 
development costs associated with Co 2-6749, as well as make milestone 
payments upon the occurrence of certain agreed upon events and pay the 
Company $3.0 million per year for up to three years to identify back-up 
compounds. However, if Co 2-6749 fails to meet certain criteria, and the 
back-up program fails to produce a back-up compound that meets other certain 
criteria, Wyeth-Ayerst has the right to terminate the back-up program and 
require CoCensys to reimburse them for a portion of the back-up funding. As 
of December 31, 1998, the Company had $2.6 million of deferred revenue 
recorded on its balance sheet related to the Wyeth-Ayerst back-up program.

         Pursuant to the Company's Development and Commercialization 
Agreement with Searle, both companies were obligated to pay a portion of the 
development costs of CCD 3693 and its back-up compounds for the U.S. market. 
In addition, Searle purchased 100,000 shares of the Company's Series B 
Convertible Preferred Stock for $7.0 million during 1996. In May 1998, the 
preferred stock converted, in accordance with its terms, into 1.6 million 
shares of common stock at a conversion price of $4.375 per share. In July 
1998, Searle notified CoCensys that it had decided not to participate further 
in the development of the Company's proprietary compounds for the treatment 
of insomnia. CoCensys intends to continue research and development of its 
compounds to treat insomnia and will consider seeking a new partner for the 
program in the future.

         CoCensys' operations to date have consumed substantial amounts of 
cash. While the Company's cash forecasts for the twelve months ending 
December 31, 1999, project a positive cash balance, certain cash inflows 
included in these forecasts are estimates and are not guaranteed. Should the 
Company not receive these anticipated payments, or should the timing or 
amount of these payments differ substantially from the forecasted amounts, or 
should the Company incur expenses in excess of those currently forecasted, 
the ability of the Company to continue funding its operations could be 
jeopardized. However, the Company is actively considering three courses of 
action that management believes will increase cash inflows, or decrease cash 
outflows, sufficiently to ensure adequate funding for its operations through 
at least fiscal 1999.

         First, the Company is aggressively seeking partners for several of 
its compounds. The Company is in negotiations with several pharmaceutical 
companies regarding Co 102862 for neuropathic pain. Management is actively 
working to sign a licensing agreement within in the next six months for Co 
102862 and is attempting to secure initial payments that, when combined with 
the current cash balance, will be sufficient to fund operations through at 
least fiscal 1999. Other compounds may be licensed later in the year.

         Second, the Company is attempting to generate revenues by
selling clinical and preclinical development services either to its
collaboration partners or to third parties. CoCensys currently employs over
thirty individuals in the development area who have extensive 


                                        32
<PAGE>

pharmaceutical development expertise in numerous indications.

         Third, in the absence of a revenue generating licensing or service 
deal, the Company will take steps to reduce expenses through reductions in 
headcount and other costs. Cost savings associated with these expense 
reductions, when combined with our current cash balance, will be adequate to 
fund the Company's operations through at least fiscal 1999.

         The Company's future capital requirements will depend on many 
factors, including the progress of the Company's research and development 
programs, the scope and results of preclinical testing and clinical trials, 
the time and costs involved in obtaining regulatory approvals, the rate of 
technological advances, determinations as to the commercial potential of the 
Company's products under development, the status of competitive products, the 
establishment of third-party manufacturing arrangements and the establishment 
of additional collaborative relationships. There are no assurances that the 
Company will available to it the substantial capital resources necessary to 
continue product development and other Company operations.

IMPACT OF YEAR 2000

         Some of the Company's older computer programs were written using two
digits rather than four to define the applicable year. As a result, those
computer programs recognize a date using "00" as the year 1900 rather than the
year 2000. This could cause a system failure or miscalculations causing
disruptions of operations, including a temporary inability to process
transactions or engage in normal business activities.

         The Company has developed a plan to address the Year 2000 issues. The
plan is segregated into four phases:

     1.       Information collection.
     2.       Risk assessment and testing of mission critical systems.
     3.       Remediation.
     4.       Monitoring and contingency planning

         The Company has completed the first two phases of the project and 
has tested, upgraded or developed plans to upgrade all individual software 
and hardware applications that fall within the mission critical category. All 
of the Company's major software applications and hardware systems are 
purchased from major vendors and the Company performs little or no 
customizations to those applications and systems. The Company's major 
software providers have attested to Year 2000 compliance. The Company has 
reviewed other equipment for embedded technologies, which may be Year 2000 
susceptible and has already upgraded or developed plans to upgrade all 
mission critical systems. The Company has spent less than $50,000 to date on 
hardware and software upgrades to ensure Year 2000 compliance and it 
anticipates that further upgrades will cost less than $100,000, most of which 
will be spent acquiring a Year 2000 compliant telephone system. The funds for 
these upgrades will come from current cash or new capital lease lines. The 
Company expects to be fully Year 2000 compliant by June 1999. A contingency 
plan will also be developed by that date.



                                        33
<PAGE>

ITEM 7A - QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The Company has no financial instruments which are subject to market risk. 
Although the Company's earnings and cash flows are subject to fluctuations 
due to changes in the interest rates on its investments, a hypothetical 10% 
adverse decrease in the interest rates would not have a material adverse 
effect on the results of operations because the majority of the Company's 
investments are short-term government and corporate obligations. A 10% 
reduction in interest rates would reduce interest income by approximately 
$91,000 annually. Due to the short period to maturity, the Company believes 
that the impact of a 10% reduction in interest rates would not have a 
material effect on the carrying value of its available-for-sale securities.

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

         The financial statements and supplementary data of the Company are
provided at the pages indicated in Item 14 (a).


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

         There has not been any change of accountants or any disagreements 
with the Company's accountants on any matter of accounting practice or 
financial disclosure during the reporting periods.



                                        34

<PAGE>

PART III


ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

         Information with respect to executive officers and directors of the
Company appearing in the Proxy Statement for the Company's 1999 Annual Meeting
of Stockholders (the "Proxy Statement") under the captions "Election of
Directors", "Management" and "Compliance with Section 16(a) of the Securities
Exchange Act of 1934" is incorporated herein by reference.


ITEM 11. EXECUTIVE COMPENSATION

         Information with respect to executive compensation appearing in the
Proxy Statement under the caption "Executive Compensation" is incorporated
herein by reference.


ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

         The information required by this item is incorporated herein by
reference to the information in the Proxy Statement labeled "Security Ownership
of Certain Beneficial Owners and Management."


ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

         The information required by this item is incorporated herein by
reference to the section in the Proxy Statement labeled "Certain Relationships
and Related Transactions."



                                        35
<PAGE>



PART IV


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

(A)               FINANCIAL STATEMENTS

                  The financial statements required by this item are submitted
                  in a separate section beginning on Page 38 of this report.

                  FINANCIAL STATEMENTS OF COCENSYS, INC.

                  Report of Independent Auditors                             42
                  Balance Sheets as of December 31, 1998 and 1997            43
                  Statements of Operations for the years ended
                    December 31, 1998, 1997 and 1996; and the period from
                     inception (February 15, 1989) to December 31, 1998      44
                  Statements of Stockholders' Equity  for the period from
                    inception (February 15, 1989) to December 31, 1998       45
                  Statements of Cash Flows for the years ended
                    December 31, 1998, 1997 and 1996; and the period from
                    inception (February 15, 1989) to December 31, 1998       48
                  Notes to Financial Statements                              49

                  Schedules are omitted as the required information is not
                  present or is not present in amounts sufficient to require
                  submission of the schedule, or because the information
                  required is included in the financial statements or notes
                  thereto.

(B)               REPORTS ON FORM 8-K

                  (i) The Company filed a current report on Form 8-K dated
                  October 16, 1998, to announce negative results from its Phase
                  II clinical trial using a tablet formulation of ganaxolone for
                  acute migraine.

                  (ii) The Company filed a current report on Form 8-K dated
                  December 8, 1998, to announce it received notice from the
                  Nasdaq Stock Market, Inc. that the Company was not in
                  compliance with the $1.00 minimum closing bid price
                  requirement for the continued listing of the Company's common
                  stock on the Nasdaq National Market.



                                        36
<PAGE>



(C)      EXHIBITS

<TABLE>
<CAPTION>
         Exhibit
         Number   Notes Description
         <S>      <C>               <C>
         3(i).1         (2)         Amended and Restated Certificate of Incorporation.
         3(i).2         (2)         Certificate of Designation of Series A Junior Participating 
                                    Preferred Stock.
         3(i).3         (2)         Certificate of Powers, Designation, Preferences, Rights and
                                    Limitations of Series B
                                    Convertible Preferred Stock.
         3(i).4         (2)         Certificate of Amendment of Amended and Restated Certificate 
                                    Incorporation.
         3(i).5         (2)         Certificate of Powers, Designation, Preferences, Rights and  
                                    Limitations of Series C
                                    Convertible Preferred Stock.
         3(i).6         (2)         Certificate of Powers, Designation, Preferences, 
                                    Rights and Limitations of Series D Convertible Preferred 
                                    Stock.
         3(i).7         (9)         Certificate of Powers, Designation, Preferences, 
                                    Rights and Limitations of Series E Convertible 
                                    Preferred Stock.
         3(ii)          (1)         By-laws.
         10.1           (1)         Form of Indemnity Agreement entered into between the 
                                    Company and its directors and officers.
         10.2           (10)+       Company's 1990 Stock Option Plan, as amended (the "Option 
                                    Plan").
         10.3           (1) +       Form of Incentive Stock Option Agreement under the Option 
                                    Plan.
         10.4           (1) +       Form of Non-qualified Stock Option Agreement under the 
                                    Option Plan.
         10.5           (1) +       Non-qualified  Stock Option Agreement between the Company 
                                    and Timothy J. Rink, M.D., Sc.D., dated as of September 
                                    13, 1991.
         10.6           (4) +       Company's 1992 Non-Employee Directors' Stock Option 
                                    Plan, as amended (the "Directors' Plan").
         10.7           (1) +       Form of Stock Option Agreement under the Directors' Plan.
         10.8           (1)         Exclusive License Agreement among the Company, The 
                                    Rockefeller University and the University of Southern 
                                    California, dated as of August 28, 1990.
         10.9           (1)         Multi-tenant Lease between the Company and The Irvine 
                                    Company, dated as of January 30, 1992.
         10.10          (3)         Form of First Amendment to the Multi-tenant Lease 
                                    between the Company and the Irvine Company, dated April 
                                    1, 1994.
         10.11          (5)         Common Stock and Warrant Purchase Agreement, dated June 
                                    6, 1995, between the Company and each of the purchasers 
                                    listed on the Schedule of Purchasers attached thereto.
         10.12          (6) +       Company's 1995 Employee Stock Purchase Plan.
         10.13          (8)         Stock Purchase Agreement, dated October 26, 1995, between 
                                    CoCensys, Inc. and Warner-Lambert Company.
         10.14          (10)        Form of Amendment to the Multi-tenant Lease between 
                                    the Company and The Irvine Company, dated as of February 
                                    9, 1996.
         10.15          (15)+       Company's 1996 Equity Incentive Plan.
         10.16          (15)+       Letter Agreement between F. Richard Nichol, Ph.D. and the 
                                    Company,  dated as of January 20, 1997.


                                        37
<PAGE>

         10.17          (15)+       Form of Incentive Stock Option Agreement under the 1996 
                                    Equity Incentive Plan.
         10.18          (15)+       Form of Nonstatutory Stock Option Agreement under the 1996 
                                    Equity Incentive Plan.
         10.19          (12)*       Promotion Agreement between the Company and Parke-Davis, 
                                    dated as of January 1, 1997.
         10.20          (12)*       License Agreement between the Company and Massachusetts 
                                    General Hospital, dated as of December 15, 1996.
         10.21          (13)*       Asset Purchase Agreement between the Company and Watson 
                                    Pharmaceuticals, dated October 8, 1997.
         10.22          (14)*       1997 Promotion Agreement, effective April 7, 1997, 
                                    between Somerset Pharmaceuticals, Inc. and the Company.
         10.23          (14)*       Development and Commercialization Agreement (No. 1),  
                                    dated May 12, 1997, between Wyeth-Ayerst Laboratories and 
                                    the Company ("Wyeth-Ayerst Agreement No. 1").
         10.24          (14)*       Development and Commercialization Agreement (No. 2), dated 
                                    May 12, 1997, between Wyeth-Ayerst Laboratories and the Company.
         10.25          (14)        Preferred  Stock Purchase  Agreement,  dated May 12, 1997, 
                                    between  American Home Products, Inc. and the Company 
                                    (included as Exhibit F to Wyeth-Ayerst Agreement No. 1).
         10.26          (2)*        Amended and Restated Research, Development and 
                                    Marketing Collaboration Agreement (II), dated as of 
                                    October 13, 1997, between Warner-Lambert Company and the 
                                    Company.
         10.27          (2)         Series D Convertible Preferred Stock Purchase Agreement, 
                                    dated October 13, 1997, between Warner-Lambert Company 
                                    and the Company.
         10.28          (2)*        Amended and Restated License Agreement, dated December 
                                    16, 1997, between Massachusetts General Hospital and the 
                                    Company.
         10.29          (9)         Securities Purchase Agreement dated June 8, 1998, among 
                                    the Company and the purchasers set forth therein.
         10.30          (9)         Form of Stock Purchase Warrant (Initial Warrants) in 
                                    connection with June 8, 1998 Securities Purchase 
                                    Agreement.
         10.31          (9)         Registration Rights Agreement dated June 8, 1998, among 
                                    the Company and the purchasers set forth therein.
         10.32          (9)         Form of Stock Purchase Warrant (Additional Warrants) 
                                    in connection with June 8, 1998 Securities Purchase 
                                    Agreement.
         10.33          (11)+       Company's Executive Officers' Severance Benefit Plan.
         10.34          (11)+       Company's Executive Officers' Change of Control Severance 
                                    Plan.
         10.35          (11)*       Agreement with Warner-Lambert Company dated January 8, 
                                    1998.
         10.36          (7)         1998 Non-Officer Equity Incentive Plan and Form of 
                                    Agreement.
         23.1                       Consent of Independent Auditors.
         27.1                       Financial Data Schedule
         -------------------
</TABLE>
         (1)      Incorporated by reference to the Company's Registration
                  Statement on Form S-1, file number 33-55522, or amendments
                  thereto.


                                        38
<PAGE>

         (2)      Incorporated by reference to the Company's Annual Report on
                  Form 10-K for the year ended December 31, 1997.

         (3)      Incorporated by reference to the Company's Annual Report on
                  Form 10-K for the year ended December 31, 1994.

         (4)      Incorporated by reference to the Company's Registration
                  Statement on Form S-8, file number 33-97258.

         (5)      Incorporated by reference to the Company's Quarterly Report on
                  Form 10-Q for the quarter ended June 30, 1995.

         (6)      Incorporated by reference to the Company's Registration
                  Statement on Form S-8, file number 33-92760.

         (7)      Incorporated by reference to the Company's Quarterly Report on
                  Form 10-Q for the quarter ended September 30, 1998.

         (8)      Incorporated by reference to the Company's Registration
                  Statement on Form S-3, file number 33-80809.

         (9)      Incorporated by reference to the Company's Current Report on
                  Form 8-K dated June 8, 1998.

         (10)     Incorporated by reference to the Company's Annual Report on
                  Form 10-K, as amended by Form 10-K/A, for the year ended
                  December 31, 1995.

         (11)     Incorporated by reference to the Company's Quarterly Report on
                  Form 10-Q for the quarter ended March 30, 1998.

         (12)     Incorporated by reference to the Company's Current Report on
                  Form 8-K dated December 15, 1996.

         (13)     Incorporated by reference to the Company's Quarterly Report on
                  Form 10-Q for the quarter ended September 30, 1997.

         (14)     Incorporated by reference to the Company's Quarterly Report on
                  Form 10-Q for the quarter ended June 30, 1997.

         (15)     Incorporated by reference to the Company's Annual Report on
                  Form 10-K, as amended by Form 10-K/A, for the year ended
                  December 31, 1996.

         +        Compensatory plan.

         *        Confidential treatment granted.


                                        39
<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.

                                              COCENSYS, INC.


Date:    March 24, 1999              By: /s/ F. Richard Nichol, Ph.D.       
                                         -----------------------------------
                                         (F. Richard Nichol, Ph.D.)
                                         Chairman of the Board,
                                         President and Chief Executive Officer


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

<TABLE>
<CAPTION>

Signature                                   Title                            Date         
- ---------                                   -----                            ----
<S>                                    <C>                              <C>
 /s/ F. Richard Nichol, Ph.D.          Chairman of the Board,           March 24, 1999
- -----------------------------------    President and
    (F. Richard Nichol, Ph.D.)         Chief Executive Officer
                                       (PRINCIPAL EXECUTIVE OFFICER)


 /s/ Robert R. Holmen                  Vice President and               March 24, 1999
- -----------------------------------    General Counsel               
    (Robert R. Holmen)                 (PRINCIPAL FINANCIAL OFFICER) 


 /s/ Thomas B. Miller                  Director of Finance and          March 24, 1999
- -----------------------------------    Controller
    (Thomas B. Miller)                 (PRINCIPAL ACCOUNTING OFFICER)


 /s/ Lowell E. Sears                   Director                        March 24, 1999
- -----------------------------------   
    (Lowell E. Sears)


 /s/ James C. Blair, Ph.D.             Director                        March 24, 1999
- -----------------------------------   
    (James C. Blair, Ph.D.)


 /s/ Kelvin W. Gee, Ph.D.              Director                        March 24, 1999
- -----------------------------------   
    (Kelvin W. Gee, Ph.D.)


                                        40
<PAGE>
<CAPTION>

SIGNATURES CONTINUED

Signature                                   Title                            Date         
- ---------                                   -----                            ----
<S>                                    <C>                              <C>

 /s/ Alan C. Mendelson                 Director                        March 24, 1999
- -----------------------------------   
    (Alan C. Mendelson)


 /s/ Timothy J. Rink, M.D., Sc.D.      Director                        March 24, 1999
- -----------------------------------   
    (Timothy J. Rink, M.D., Sc.D.)


 /s/ Robert L. Roe, M.D.               Director                        March 24, 1999
- -----------------------------------   
    (Robert L. Roe, M.D.)


 /s/ Eckard Weber, M.D.                Director                        March 24, 1999
- -----------------------------------   
    (Eckard Weber, M.D.)

</TABLE>


                                        41

<PAGE>


                         Report of Independent Auditors


Board of Directors and Stockholders
CoCensys, Inc.

We have audited the accompanying balance sheets of CoCensys, Inc. (a development
stage company) as of December 31, 1998 and 1997, and the related statements of
operations, stockholders' equity, and cash flows for each of the three years in
the period ended December 31, 1998, and the period from inception (February 15,
1989) to 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 financial position of CoCensys, Inc. at December 31,
1998 and 1997, and the results of its operations and its cash flows for each of
the three years in the period ended December 31, 1998, and for the period from
inception (February 15, 1989) to December 31, 1998, in conformity with generally
accepted accounting principles.


                                                /s/  ERNST & YOUNG LLP



Orange County, California
January 29, 1999, except for the
 last paragraph of Note 2 as to
 which the date is March 24, 1999


                                        42

<PAGE>



                                 COCENSYS, INC.
                          (A development stage company)

                                 BALANCE SHEETS
               (In thousands, except share and par value amounts)

<TABLE>
<CAPTION>
                                                            DECEMBER 31,       DECEMBER 31,
                                                                1998              1997    
                                                            ------------       ------------
<S>                                                         <C>                <C>
ASSETS
Current assets:
  Cash and cash equivalents                                   $   2,222          $  3,410
  Short-term investments                                          9,973             9,050
  Other current assets                                              321               898
                                                              ---------          --------
TOTAL CURRENT ASSETS                                             12,516            13,358

Property and equipment, net                                       2,466             2,823
Investments                                                           -               500
Notes receivable from officers                                       56               178
Other noncurrent assets                                              61                57
                                                              ---------          --------
                                                              $  15,099          $ 16,916
                                                              ---------          --------
                                                              ---------          --------

LIABILITIES & STOCKHOLDERS' EQUITY 
Current liabilities:
  Accounts payable                                            $     534          $    866
  Accrued compensation and benefits                                 748             1,107
  Due to corporate partners                                       1,322               747
  Other accrued liabilities                                       1,326             1,911
  Deferred revenue                                                2,955                 -
  Capital lease obligations - current portion                       316               353
                                                              ---------          --------
TOTAL CURRENT LIABILITIES                                         7,201             4,984

Capital lease obligations, less current portion                     366               567
Other liabilities                                                    26               534

Commitments and contingencies

Stockholders' equity:
  Convertible nonvoting preferred stock, $.001 par value 
    Authorized shares - 5,000,000 
    Issued and outstanding shares - 206,445 at 
      December 31, 1998 and 214,286 at December 31, 1997         16,386            13,000
  Common stock, $.001 par value
    Authorized shares - 75,000,000
    Issued and outstanding shares - 27,382,187 at 
      December 31, 1998 and 22,857,506 at December 31, 1997     107,381            97,230
  Deficit accumulated during the development stage             (116,151)          (98,983)
  Deferred compensation                                            (138)             (430)
  Accumulated other comprehensive income                             28                14
                                                              ---------          --------
TOTAL STOCKHOLDERS' EQUITY                                        7,506            10,831
                                                              ---------          --------
                                                              $  15,099          $ 16,916
                                                              ---------          --------
                                                              ---------          --------
</TABLE>

                             See accompanying notes

                                        43
<PAGE>

                                 COCENSYS, INC.
                          (A development stage company)

                            STATEMENTS OF OPERATIONS
                    (In thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                                                                      PERIOD FROM
                                                                                                       INCEPTION
                                                                                                     (FEBRUARY 15,
                                                                     YEAR ENDED DECEMBER 31,            1989) TO
                                                          ---------------------------------------     DECEMBER 31,
                                                            1998           1997            1996           1998 
                                                          --------       ---------      ---------       --------
<S>                                                       <C>            <C>            <C>             <C>
REVENUES
  Co-promotion revenues from corporate partners           $    540       $   3,264      $   9,085       $ 30,705
  Co-development revenues from corporate partners            2,046           8,650          6,073         18,739
                                                          --------       ---------      ---------       --------
Total revenues                                               2,586          11,914         15,158         49,444
                                                          --------       ---------      ---------       --------

OPERATING EXPENSEs
  Research and development                                  15,745          23,308         20,949        106,674
  Marketing, general and administrative                      3,894           9,975         13,862         52,050
  Acquired research and development                              -               -              -         14,879
                                                          --------       ---------      ---------       --------
Total operating expenses                                    19,639          33,283         34,811        173,603
                                                          --------       ---------      ---------       --------

Operating loss                                             (17,053)        (21,369)       (19,653)      (124,159)

Gain on disposition of sales force                           1,000           4,728              -          5,728
Interest income                                                908             898          1,304          5,361
Interest expense                                               (81)            (78)          (139)        (1,139)
                                                          --------       ---------      ---------       --------

Net loss                                                   (15,226)        (15,821)       (18,488)      (114,209)

Dividends on preferred stock                                 1,942               -              -          1,942
                                                          --------       ---------      ---------       --------

Net loss applicable to common stockholders                $(17,168)      $ (15,821)     $ (18,488)      $(116,151)
                                                          --------       ---------      ---------       --------
                                                          --------       ---------      ---------       --------

Basic and diluted loss per share                          $  (0.70)      $  (0.70)      $   (0.85)
                                                          --------       ---------      ---------       
                                                          --------       ---------      ---------       

Shares used in computing basic
   and diluted loss per share                               24,524          22,574         21,783
                                                          --------       ---------      ---------       
                                                          --------       ---------      ---------       
</TABLE>


                             See accompanying notes

                                        44
<PAGE>

                                 COCENSYS, INC.
                          (A development stage company)

                       STATEMENTS OF STOCKHOLDERS' EQUITY
               (In thousands, except share and per share amounts)

<TABLE>
<CAPTION>
                                                          CONVERTIBLE                          
                                                        PREFERRED STOCK                  COMMON STOCK    
                                                   -------------------------      -------------------------
                                                     SHARES         AMOUNT          SHARES          AMOUNT  
                                                   ---------       ---------      ----------       --------
<S>                                                <C>             <C>            <C>              <C>
Net loss                                                --         $    --              --         $   --   
Issuance of common stock for
  cash at $.005 per share                               --              --           980,000              5
                                                   ---------       ---------      ----------       --------
BALANCE AT DECEMBER 31, 1989                            --              --           980,000              5

Net loss                                                --              --              --             --   
Issuance of Series A convertible
  preferred stock upon conversion
  of promissory note, net of offering
  costs of $5 at $.25 per share                      400,000              95            --             --   
Issuance of Series B convertible
  preferred stock for $3,110 cash and
  conversion of $515 of convertible
  promissory notes, net of offering costs
  of $46 at $1.50 per share                        2,416,666           3,579            --             --   
Issuance of warrants to purchase 30,100
  shares of Series B convertible preferred
  stock in connection with a note payable               --                 8            --             --   
Common stock issued in connection with
  services rendered                                     --              --             6,668           --   
                                                   ---------       ---------      ----------       --------
BALANCE AT DECEMBER 31, 1990                       2,816,666           3,682         986,668              5

Net loss                                                --              --              --             --   
Common stock issued in connection with
  services rendered                                     --              --             3,332           --   
                                                   ---------       ---------      ----------       --------
BALANCE AT DECEMBER 31, 1991                       2,816,666           3,682         990,000              5

Net loss                                                --              --              --             --   
Issuance of Series C convertible preferred
  stock for cash, net of offering costs of
  $60 at $5.00 per share                           2,631,218          13,096            --             --   
Issuance of Series C convertible preferred
  stock in exchange for services at $5.00
  per share                                            3,332              17            --             --   
Issuance of Series C convertible preferred
  stock in exchange for stock purchase
  option at $5.00 per share                           20,000             100            --             --   
Deferred compensation related to the
  issuance of certain stock options                     --              --              --            2,842
Amortization of deferred compensation                   --              --              --             --   
                                                   ---------       ---------      ----------       --------
BALANCE AT DECEMBER 31, 1992                       5,471,216          16,895         990,000          2,847

Net loss                                                --              --              --             --   
Issuance of Series B convertible preferred
  stock in exchange for  noncash exercise
  of warrants                                         25,083             226            --             --   
Conversion of convertible preferred stock
  into common stock at the close of the
  initial public offering                         (5,496,299)        (17,121)      5,496,299         17,121
Issuance of common stock for cash in
  initial public offering at $9.00 per share,
  net of offering costs and underwriters'
  discount of $2,193                                    --              --         2,500,000         20,307
Common stock issued in connection with
 stock options                                          --              --           116,798             18
Issuance and termination of certain
  stock options                                         --              --              --               43
Amortization of deferred compensation                   --              --              --             --   
                                                   ---------       ---------      ----------       --------
BALANCE AT DECEMBER 31, 1993                            --              --         9,103,097         40,336

<CAPTION>
                                                   DEFICIT                    ACCUMULATED                           
                                                  ACCUMULATED                   OTHER                      
                                                  DURING THE      DEFERRED  COMPREHENSIVE     TOTAL      
                                                  DEVELOPMENT      COMPEN-      INCOME      STOCK HOLDERS'  
                                                     STAGE         SATION       (LOSS)         EQUITY      
                                                  -----------     --------  -------------   -------------
<S>                                               <C>             <C>       <C>             <C>
Net loss                                          $     (147)     $     --        $  --       $     (147)
Issuance of common stock for
  cash at $.005 per share                               --              --           --                5
                                                  -----------     --------  -------------   -------------
BALANCE AT DECEMBER 31, 1989                            (147)           --           --             (142)

Net loss                                                (910)           --           --             (910)
Issuance of Series A convertible
  preferred stock upon conversion
  of promissory note, net of offering
  costs of $5 at $.25 per share                         --              --           --               95
Issuance of Series B convertible
  preferred stock for $3,110 cash and
  conversion of $515 of convertible
  promissory notes, net of offering costs
  of $46 at $1.50 per share                             --              --           --            3,579
Issuance of warrants to purchase 30,100
  shares of Series B convertible preferred
  stock in connection with a note payable               --              --           --                8
Common stock issued in connection with
  services rendered                                     --              --           --             --
                                                  -----------     --------  -------------   -------------
BALANCE AT DECEMBER 31, 1990                          (1,057)           --           --            2,630

Net loss                                              (2,369)           --           --           (2,369)
Common stock issued in connection with
  services rendered                                     --              --                          --   
                                                  -----------     --------  -------------   -------------
BALANCE AT DECEMBER 31, 1991                          (3,426)           --           --              261

Net loss                                              (6,267)           --           --           (6,267)
Issuance of Series C convertible preferred
  stock for cash, net of offering costs of
  $60 at $5.00 per share                                --              --           --           13,096
Issuance of Series C convertible preferred
  stock in exchange for services at $5.00
  per share                                             --              --           --               17
Issuance of Series C convertible preferred
  stock in exchange for stock purchase
  option at $5.00 per share                             --              --           --              100
Deferred compensation related to the
  issuance of certain stock options                     --          (2,842)          --             --
Amortization of deferred compensation                   --             152           --              152
                                                  -----------     --------  -------------   -------------
BALANCE AT DECEMBER 31, 1992                          (9,693)       (2,690)          --            7,359

Net loss                                             (10,273)           --           --          (10,273)
Issuance of Series B convertible preferred
  stock in exchange for  noncash exercise
  of warrants                                           --              --           --              226
Conversion of convertible preferred stock
  into common stock at the close of the
  initial public offering                               --              --           --             --
Issuance of common stock for cash in
  initial public offering at $9.00 per share,
  net of offering costs and underwriters'
  discount of $2,193                                    --              --           --           20,307
Common stock issued in connection with
 stock options                                          --              --           --               18
Issuance and termination of certain
  stock options                                         --             (43)          --             --
Amortization of deferred compensation                   --             760           --              760
                                                  -----------     --------  -------------   -------------
BALANCE AT DECEMBER 31, 1993                         (19,966)       (1,973)          --           18,397
</TABLE>
                             See accompanying notes


                                        45
<PAGE>



                                            COCENSYS, INC.
                                   (A development stage company)

                          STATEMENTS OF STOCKHOLDERS' EQUITY (CONTINUED)
                        (In thousands, except share and per share amounts)

<TABLE>
<CAPTION>
                                                          CONVERTIBLE                          
                                                        PREFERRED STOCK                  COMMON STOCK    
                                                   -------------------------      -------------------------
                                                     SHARES         AMOUNT          SHARES          AMOUNT  
                                                   ---------       ---------      ----------       --------
<S>                                                <C>             <C>            <C>              <C>
Net loss                                                  --           --               --             --   
Unrealized loss on investments                            --           --               --             --   
Comprehensive income                                      --           --               --             --   
Purchase of common stock by Acea
  shareholders pursuant to merger
  agreement at $4.56 and $5.11 per share                  --           --            415,368          2,002
Acquisition of Acea in exchange for
  common stock at $3.00 per share                         --           --          3,784,332         11,353
Exchange of Acea options and warrants
  for equivalent options and warrants                     --           --               --              592
Purchase of common stock by corporate
  partner at $4.51 per share                              --           --            443,214          2,000
Common stock issued in connection with:
  Stock options                                           --           --             68,380             32
  Other employee programs                                 --           --             20,000             75
Issuance and termination of certain
  stock options                                           --           --               --              110
Amortization of deferred compensation                     --           --               --             --   
                                                   ---------       ---------      ----------       --------
BALANCE AT DECEMBER 31, 1994                              --           --         13,834,391         56,500

Net loss                                                  --           --               --             --   
Unrealized gain on investments                            --           --               --             --   

Comprehensive income                                      --           --               --             --   
Purchase of common stock by corporate
  partner at $3.48 per share                              --           --          1,434,978          5,000
Issuance of common stock and related
  warrants for cash at $3.25 per share,
  net of cost of $149                                     --           --          3,707,693         11,901
Purchase of common stock by corporate partner
  at $7.00 per share, net of costs of $14                 --           --            285,970          1,986
Common stock issued in connection with:
  Stock options                                           --           --             88,579            109
  Employee Stock Purchase Plan                            --           --             39,730            152
  Other employee programs                                 --           --              4,000             29
Issuance and termination of certain
  stock options                                           --           --               --              619
Amortization of deferred compensation                     --           --               --             --   
                                                   ---------       ---------      ----------       --------
BALANCE AT DECEMBER 31, 1995                              --           --         19,395,341         76,296

Net loss                                                  --           --               --             --   
Unrealized gain on investments                            --           --               --             --   

Comprehensive income                                      --           --               --             --   
Issuance of common stock for cash at
  $6.50 per share, net of costs of $1,162                 --           --          2,430,000         14,633

Issuance of Series B convertible preferred
  stock for cash to corporate partner                  100,000        7,000             --             --   
Common stock issued in connection with:
  Stock options                                           --           --            138,762            194
  Employee Stock Purchase Plan                            --           --            112,743            446
  Other employee programs                                 --           --              6,500             54
Issuance and termination of certain stock
  options                                                 --           --               --            2,363
Amortization of deferred compensation                     --           --               --             --   
                                                   ---------       ---------      ----------       --------
BALANCE AT DECEMBER 31, 1996                           100,000        7,000       22,083,346         93,986

<CAPTION>
                                                   DEFICIT                    ACCUMULATED                           
                                                  ACCUMULATED                   OTHER                      
                                                  DURING THE      DEFERRED  COMPREHENSIVE     TOTAL      
                                                  DEVELOPMENT      COMPEN-      INCOME      STOCK HOLDERS'  
                                                     STAGE         SATION       (LOSS)         EQUITY      
                                                  -----------     --------  -------------   -------------
<S>                                               <C>             <C>       <C>             <C>
Net loss                                              (26,586)          --            --         (26,586)
Unrealized loss on investments                           --             --           (25)            (25)
                                                                                           -------------
Comprehensive income                                     --             --            --         (26,611)
Purchase of common stock by Acea
  shareholders pursuant to merger
  agreement at $4.56 and $5.11 per share                 --             --            --           2,002
Acquisition of Acea in exchange for
  common stock at $3.00 per share                        --             --            --          11,353
Exchange of Acea options and warrants
  for equivalent options and warrants                    --             --            --             592
Purchase of common stock by corporate
  partner at $4.51 per share                             --             --            --           2,000
Common stock issued in connection with:
  Stock options                                          --             --            --              32
  Other employee programs                                --             --            --              75
Issuance and termination of certain
  stock options                                          --             (110)         --            --
Amortization of deferred compensation                    --              707          --             707
                                                  -----------     --------  -------------   -------------
BALANCE AT DECEMBER 31, 1994                          (46,552)        (1,376)          (25)        8,547

Net loss                                              (18,122)          --            --         (18,122)
Unrealized gain on investments                           --             --               3             3
                                                                                            -------------
Comprehensive income                                     --             --            --         (18,119)
Purchase of common stock by corporate
  partner at $3.48 per share                             --             --            --           5,000
Issuance of common stock and related
  warrants for cash at $3.25 per share,
  net of cost of $149                                    --             --            --          11,901
Purchase of common stock by corporate partner
  at $7.00 per share, net of costs of $14                --             --            --           1,986
Common stock issued in connection with:
  Stock options                                          --             --            --             109
  Employee Stock Purchase Plan                           --             --            --             152
  Other employee programs                                --             --            --              29
Issuance and termination of certain
  stock options                                          --             (619)         --            --
Amortization of deferred compensation                    --            1,039          --           1,039
                                                  -----------     --------  -------------   -------------
BALANCE AT DECEMBER 31, 1995                          (64,674)          (956)          (22)       10,644

Net loss                                              (18,488)          --            --         (18,488)
Unrealized gain on investments                           --             --              50            50
                                                                                            -------------
Comprehensive income                                     --             --            --         (18,438)
Issuance of common stock for cash at
  $6.50 per share, net of costs of $1,162                --             --            --          14,633
Issuance of Series B convertible preferred
  stock for cash to corporate partner                    --             --            --           7,000
Common stock issued in connection with:
  Stock options                                          --             --            --             194
  Employee Stock Purchase Plan                           --             --            --             446
  Other employee programs                                --             --            --              54
Issuance and termination of certain stock
  options                                                --             (629)         --           1,734
Amortization of deferred compensation                    --              680          --             680
                                                  -----------     --------  -------------   -------------
BALANCE AT DECEMBER 31, 1996                          (83,162)          (905)           28        16,947
</TABLE>


                             See accompanying notes

                                        46
<PAGE>



                                 COCENSYS, INC.
                          (A development stage company)

                 STATEMENTS OF STOCKHOLDERS' EQUITY (CONTINUED)
               (In thousands, except share and per share amounts)

<TABLE>
<CAPTION>
                                                          CONVERTIBLE                          
                                                        PREFERRED STOCK                  COMMON STOCK    
                                                   -------------------------      -------------------------
                                                     SHARES         AMOUNT          SHARES          AMOUNT  
                                                   ---------       ---------      ----------       --------
<S>                                                <C>             <C>            <C>              <C>

Net loss                                                 --             --              --             --   
Unrealized loss on investments                           --             --              --             --   

Comprehensive income                                     --             --              --             --   
Issuance of Series C convertible preferred
  stock for cash to corporate partner                 100,000          5,000            --             --   
Issuance of Series D convertible preferred
  stock for cash to corporate partner                  14,286          1,000            --             --   
Issuance of common stock for cash at
  $6.16 per share to corporate partner                   --             --           324,465          2,000
Common stock issued in connection with:
  Services rendered                                      --             --            23,322              8
  Stock options                                          --             --           335,473            202
  Employee Stock Purchase Plan                           --             --            90,900            251
Issuance and termination of certain stock
  options                                                --             --              --              783
Amortization of deferred compensation                    --             --              --             --   
                                                   ----------      ---------      ----------      ---------
BALANCE AT DECEMBER 31, 1997                          214,286         13,000      22,857,506         97,230

Net loss                                                 --             --              --             --   
Unrealized gain on investments                           --             --              --             --   

Comprehensive income                                     --             --              --             --   
Conversion of Series B convertible preferred
 into common stock by corporate partner              (100,000)        (7,000)      1,600,000          7,000
Issuance of Series D convertible preferred
  stock for cash to corporate partner                  85,714          3,429            --             --   
Issuance of Series E convertible preferred
  stock, related warrants and beneficial
  conversion feature for cash, less offering costs      8,000          6,611            --            1,280
Conversion of Series E convertible preferred
  into common stock by investors                       (1,555)        (1,596)      2,563,060          1,596
Dividends accrued on preferred stock                     --            1,942            --             --   
Common stock issued in connection with:
  Services rendered                                      --             --            27,333            126
  Stock options                                          --             --           195,352             48
  Employee Stock Purchase Plan                           --             --           136,436            135
  Other employee programs                                --             --             2,500             10
Issuance and termination of certain stock
  options                                                --             --              --              (44)
Amortization of deferred compensation                    --             --              --             --   
                                                   ----------      ---------      ----------      ---------
BALANCE AT DECEMBER 31, 1998                          206,445      $  16,386      27,382,187      $ 107,381
                                                   ----------      ---------      ----------      ---------
                                                   ----------      ---------      ----------      ---------
<CAPTION>
                                                    DEFICIT                  ACCUMULATED                           
                                                  ACCUMULATED                   OTHER                      
                                                  DURING THE      DEFERRED  COMPREHENSIVE       TOTAL      
                                                  DEVELOPMENT      COMPEN-      INCOME      STOCK HOLDERS'  
                                                     STAGE         SATION       (LOSS)         EQUITY      
                                                  -----------     --------  -------------   -------------
<S>                                               <C>             <C>       <C>             <C>
Net loss                                              (15,821)         --           --              (15,821)
Unrealized loss on investments                           --            --            (14)             (14)

                                                                                              ----------
Comprehensive income                                     --            --           --            (15,835)
Issuance of Series C convertible preferred
  stock for cash to corporate partner                    --            --           --              5,000
Issuance of Series D convertible preferred
  stock for cash to corporate partner                    --            --           --              1,000
Issuance of common stock for cash at
  $6.16 per share to corporate partner                   --            --           --              2,000
Common stock issued in connection with:
  Services rendered                                      --            --           --                  8
  Stock options                                          --            --           --                202
  Employee Stock Purchase Plan                           --            --           --                251
Issuance and termination of certain stock
  options                                                --             206         --                989
Amortization of deferred compensation                    --             269         --                269
                                                      -------     ---------     --------       ----------
BALANCE AT DECEMBER 31, 1997                          (98,983)         (430)          14           10,831

Net loss                                              (17,168)         --           --            (17,168)
Unrealized gain on investments                           --            --             14               14

                                                                                               ----------
Comprehensive income                                     --            --           --            (17,154)
Conversion of Series B convertible preferred
 into common stock by corporate partner                  --            --           --               --
Issuance of Series D convertible preferred
  stock for cash to corporate partner                    --            --           --              3,429
Issuance of Series E convertible preferred
  stock, related warrants and beneficial
  conversion feature for cash, less offering costs       --            --           --              7,891
Conversion of Series E convertible preferred
  into common stock by investors                         --            --           --               --
Dividends accrued on preferred stock                     --            --           --              1,942
Common stock issued in connection with:
  Services rendered                                      --            --           --                126
  Stock options                                          --            --           --                 48
  Employee Stock Purchase Plan                           --            --           --                135
  Other employee programs                                --            --           --                 10
Issuance and termination of certain stock
  options                                                --             148         --                104
Amortization of deferred compensation                    --             144         --                144
                                                   ----------     ---------     --------       ----------
BALANCE AT DECEMBER 31, 1998                       $ (116,151)    $    (138)          28       $    7,506
                                                   ----------     ---------     --------       ----------
                                                   ----------     ---------     --------       ----------
</TABLE>

                             See accompanying notes

                                        47

<PAGE>

                                 COCENSYS, INC.
                          (A development stage company)

                            STATEMENTS OF CASH FLOWS
                                 (In thousands)

<TABLE>
<CAPTION>
                                                                                                               PERIOD FROM
                                                                                                                INCEPTION
                                                                                                              (FEBRUARY 15,
                                                                            YEAR ENDED DECEMBER 31,              1989) TO
                                                                      -----------------------------------      DECEMBER 31,
                                                                         1998        1997         1996             1998   
                                                                      ---------   ---------    ----------      ------------
<S>                                                                   <C>         <C>          <C>             <C>
OPERATING ACTIVITIES
Net loss                                                              $ (15,226)  $ (15,821)   $ (18,488)       $(114,209)
Adjustments to reconcile net loss to net
     cash used in operating activities:
  Depreciation and amortization                                             907         936        2,072            7,732
  Amortization of deferred compensation                                     144         269          680            3,751
  Issuance of stock, stock options and warrants for services                240         419        1,788            2,576
  Loss on sale of fixed assets                                             --            74         --                100
  Gain on disposition of sales force                                     (1,000)     (4,728)        --             (5,728)
  Acquired research and development                                        --          --           --             12,279
  Decrease (increase) in other current assets                               191          72         (101)            (365)
  Decrease (increase) in receivables from partners                          386         245         (659)             (28)
  Increase (decrease) in amounts due to partners                            575         301       (2,698)           1,322
  Increase in deferred revenue                                            2,955        --           --              2,955
  Increase (decrease) in accounts payable
        and other accrued liabilities                                    (1,784)       (991)         685              982
                                                                      ---------   ---------    ----------       ---------
NET CASH USED IN OPERATING ACTIVITIES                                   (12,612)    (19,224)     (16,721)         (88,633)
                                                                      ---------   ---------    ----------       ---------

INVESTING ACTIVITIES
Decrease (increase) in investments                                         (409)      7,386      (10,343)          (9,945)
Purchases of property and equipment                                        (566)     (1,475)        (812)          (7,666)
Decrease (increase) in other assets and
      notes receivable from officers                                        118      (1,083)         199           (1,273)
Cash received on sale of fixed assets                                        16           1         --                 36
Cash received on disposition of sales force                               1,000       8,000         --              9,000
Increase in deferred costs                                                 --          --           --             (2,475)
Acquisition of Acea, net of cash acquired                                  --          --           --                (62)
                                                                      ---------   ---------    ----------       ---------
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES                         159      12,829      (10,956)         (12,385)
                                                                      ---------   ---------    ----------       ---------


FINANCING ACTIVITIES
Net cash proceeds from issuance of common stock                             183       2,460       15,273           61,428
Net cash proceeds from issuance of preferred stock                       11,320       6,000        7,000           40,701
Proceeds from sales/leaseback of fixed assets and notes payable             281       1,002          649            5,516
Payments on capital lease obligations and notes payable                    (519)       (707)      (1,090)          (4,405)
                                                                      ---------   ---------    ----------       ---------
NET CASH PROVIDED BY FINANCING ACTIVITIES                                11,265       8,755       21,832          103,240
                                                                      ---------   ---------    ----------       ---------
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                     (1,188)      2,360       (5,845)           2,222
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD                            3,410       1,050        6,895             --
                                                                      ---------   ---------    ----------       ---------
CASH AND CASH EQUIVALENTS, END OF PERIOD                              $   2,222   $   3,410    $   1,050        $   2,222
                                                                      ---------   ---------    ----------       ---------
                                                                      ---------   ---------    ----------       ---------

SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
  Cash paid for interest                                              $      81   $      66    $     139        $     901
                                                                      ---------   ---------    ----------       ---------
                                                                      ---------   ---------    ----------       ---------
</TABLE>
                             See accompanying notes

                                     48

<PAGE>

                                 COCENSYS, INC.
                          (A development stage company)

                          NOTES TO FINANCIAL STATEMENTS
                                December 31, 1998


1.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

BUSINESS

CoCensys, Inc. ("CoCensys" or the "Company") was incorporated in 1989 for the
purpose of discovering, developing and commercializing novel products to treat
disorders of the brain. Since inception, the Company has devoted substantially
all of its resources to the discovery and development of such products. The
Company has not generated any revenues from the development of its own products
and has sustained continuing operating losses from its development activities.
Such losses could continue for several years. The Company plans to finance its
future development activities through a combination of sales of equity
securities, payments from corporate development partners and revenues from
performing product development services. There can be no assurance that the
Company will be successful in these areas.

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 accompanying notes.
Actual results could differ from those estimates. Significant estimates made in
preparing the financial statements include the determination of co-promotion and
co-development revenues and the valuation allowance for deferred tax assets.

FAIR VALUE OF FINANCIAL INSTRUMENTS

Financial investments that subject the Company to concentration of credit risk
consist principally of cash, cash equivalents and investments, of which
$12,095,000 is not federally insured as of December 31, 1998.


CASH EQUIVALENTS AND INVESTMENTS

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

Short-term investments consist of debt securities classified as "available for
sale" and have maturities greater than three months and less than twelve months
from the date of acquisition. Investments classified as "available for sale" are
reported at fair value with unrealized gains and losses reported as a separate
component of other comprehensive income (loss) in the statement of 
stockholders' equity.

The Company invests primarily in U.S. government securities and corporate
obligations. The following table summarized unrealized gains and losses on the
Company's investments:


                                        49
<PAGE>

<TABLE>
<CAPTION>
                                                   Gross            Gross
                                                unrealized       unrealized        Fair
                                  Cost             loss             gain           value   
                              ------------      ----------       ----------    -------------
<S>                           <C>               <C>               <C>          <C>
As of December 31, 1998       $ 11,342,471      $  (15,045)       $  43,433    $  11,507,135
As of December 31, 1997       $ 11,694,727      $   (3,401)       $  18,150    $  11,855,580
</TABLE>

Realized gains and losses were not significant for the years ended December 31,
1998, 1997 and 1996.

In October 1998, the Company established an escrow account to hold funds that 
are committed to satisfy an obligation related to the purchase of certain 
drug marketing rights and new drug approvals (NDAs) in connection with the 
disposition of its sales and marketing division in October 1998. The escrow 
account held $552,400 and $1,005,900 at December 31, 1998 and 1997, 
respectively. Under the terms of the escrow agreement, $500,000 will be paid 
in October 1999 to satisfy the remaining obligation and all excess funds will 
be released to the Company.

PROPERTY AND EQUIPMENT

Property and equipment is stated at cost and consists of the following at 
December 31, (in thousands):

<TABLE>
<CAPTION>
                                                1998              1997  
                                               -------           -------
<S>                                            <C>               <C>
Laboratory equipment                           $ 2,271           $ 2,218
Computer equipment and software                  1,483             1,107
Office equipment                                   924               930
Leasehold improvements                           2,207             2,105
                                               -------           -------
                                                 6,884             6,360
Less accumulated depreciation                   (4,418)           (3,537)
                                               -------           -------
Net property and equipment                     $ 2,466           $ 2,823
                                               -------           -------
                                               -------           -------
</TABLE>

The value of leased assets (treated as capital leases) at December 31, 1998 and
1997 were $1,082,000 and $1,007,000 respectively, net of accumulated
amortization of $204,000 and $130,000 respectively.

Depreciation of property and equipment, including assets under capital lease
obligations, has been provided using the straight-line method over the estimated
useful lives of the assets which range from three to five years, except for
leasehold improvements which are amortized over the lease term.

REVENUE AND EXPENSE RECOGNITION

See Notes 4, 5, 6, 7, 8 and 9 for revenue recognition policies related to
co-promotion and co-development revenues from corporate partners.

Co-promotion revenue is a commission earned for marketing products of another
company to a specified class of medical doctors. The amount of commission earned
is, generally, a base fee with a bonus calculated by reference to an agreed upon
measure of activity such as sales volume or prescriptions written. The Company
recognizes revenue from co-promotion activities in the period in which the
promotional services are provided.

Co-development revenue is earned pursuant to agreements with other 
pharmaceutical companies to develop and commercialize CoCensys' compounds. 
Revenue is earned in the form of licensing fees, 


                                        50
<PAGE>

payment for the attainment of developmental milestones or funding for 
research. The Company recognizes co-development revenue in the period in 
which the underlying event occurs.

COMPREHENSIVE INCOME

As of January 1, 1998, the Company adopted Statement of Financial Accounting 
Standards No. 130, "Reporting Comprehensive Income" (SFAS 130). SFAS 130 
establishes new rules for the reporting and display of comprehensive income 
and its components; however, the adoption of this Statement had no impact on 
the Company's net income or stockholders' equity. SFAS 130 requires 
unrealized gains and losses on available-for-sale securities, which prior to 
adoption were reported separately on stockholders' equity, to be included in 
other comprehensive income. Prior financial statements have been restated to 
conform to the requirements of SFAS 130.

LOSS PER SHARE

In 1998, Statement of Financial Accounting Standards No. 128, "Earnings per 
Share" ("SFAS No. 128"), replaced the calculation of primary and fully 
diluted earnings per share with basic and diluted earnings per share. Unlike 
primary earnings per share, basic earnings per share exclude any dilutive 
effect of options, warrants and convertible securities. All per share amounts 
for all prior periods have been presented and, where appropriate, restated to 
conform to the SFAS No. 128 requirements.

Both basic and diluted loss per share are computed using the weighted average 
number of shares of common stock outstanding. Common equivalent shares from 
stock options and warrants are excluded from the computation of diluted 
earnings per share as their effect would be antidilutive.

STOCK OPTION PLANS

Effective January 1, 1996, the Company has adopted the disclosure-only 
provisions of Statement of Financial Accounting Standards No. 123, 
"Accounting for Stock-Based Compensation" ("SFAS No. 123") and accordingly, 
is continuing to account for its stock-based compensation plans under 
previous accounting standards. The adoption of SFAS No. 123 had no impact on 
the Company's results of operations or financial position.

NOTES RECEIVABLE FROM OFFICERS

The Company advanced funds to certain officers in exchange for notes secured 
by mortgages on real property. Interest on these notes accrues at 8.5% per 
annum.

RECLASSIFICATIONS

Certain reclassifications have been made to prior year data to conform to the 
1998 presentation.

2.   PRIVATE PLACEMENT OF PREFERRED STOCK

In June 1998, the Company raised $8.0 million through the private placement 
of Series E Convertible Preferred Stock (the "Series E Preferred"). The 
Series E Preferred is convertible into common stock on June 8, 2001, or 
earlier at the holder's option at a price which is discounted from the fair 
market value of the Company's common stock at the time of conversion, subject 
to a maximum price of $3.93 per share. The terms of the private placement 
included the issuance of warrants to purchase 350,000 shares of 


                                        51
<PAGE>

common stock at $4.50 per share issued in June 1998 and 100,000 shares at 
$0.63 per share in November 1998.

The Series E Preferred carries an annual dividend of 7.5 percent of the face 
value of the outstanding shares, subject to reductions in the dividend rate 
if the market price of Company's common stock increases to certain levels. 
Dividends are payable quarterly in cash or, at the election of the Company, 
by adding the amount of the dividend to the conversion value of the Series E 
Preferred. Additionally, $390,000 of the $8.0 million in proceeds was 
allocated to the warrants and $890,000 was allocated to a beneficial 
conversion feature that allows investors to convert at 90% of the market 
price of the common stock starting 122 days after issuance. These two 
allocated amounts have been credited to additional paid in capital and will 
be treated as issuance discounts. Accordingly, the $890,000 was amortized 
over the first 122 days and the $390,000 will be amortized over three years, 
in the form of additional noncash preferred dividends.

During fiscal 1998, the holders of the Series E Preferred converted 
approximately $1.6 million, including accrued dividends, into approximately 
2.6 million shares of common stock. Through March 24 of fiscal 1999, the 
holders of the Series E Preferred converted approximately $1.5 million, 
including accrued dividends, into approximately 6.6 million shares of common 
stock.  The impact of the conversion on loss per share would be anti-dilutive.

3. CYTOVIA LICENSING AGREEMENT

     In January 1998, the Company licensed certain non-core technology to 
Cytovia, Inc., a new company that focuses on the commercialization of 
patented drug screening technology, using living cells, in the area of 
apoptosis or programmed cell death. In exchange, CoCensys received shares of 
common stock of Cytovia, will be entitled to receive certain royalties and 
will retain certain rights relating to the development of future therapeutic 
agents for central nervous system disorders. As of December 31, 1998, 
CoCensys' interest in Cytovia was less than twenty percent and is accounted 
for on a cost basis.

4.   DISPOSITION OF SALES AND MARKETING FORCE

On October 8, 1997, the Company entered into an Asset Purchase Agreement (the 
"Agreement") to sell its sales and marketing force (the "Force") to 
Watson Laboratories, Inc. ("Watson"), a wholly owned subsidiary of Watson 
Pharmaceuticals, Inc. Under the terms of the Agreement, Watson assumed the 
Force's co-promotion agreements, acquired certain of its operating assets 
and the right to hire approximately 70 employees of the Force. As 
consideration for these assets, the Company received $8.0 million from Watson 
in October 1998 with up to $1.0 million more due to the Company if Watson 
retained, as of specified future dates, certain percentages of the employees 
from the Force. Pursuant to this contingency arrangement, Watson paid 
CoCensys $750,000 in April 1998 and $250,000 in October 1998.

In order to satisfy certain provisions of the Agreement, the Company entered 
into, and transferred to Watson, agreements with two pharmaceutical companies 
for marketing rights and NDAs for two drugs with an aggregate cost of $2.0 
million. Of this total, the Company paid $1.0 million in October 1997. 
Additionally, $1.0 million of the $8.0 million of proceeds from the sale of 
the Force was placed into an escrow account to satisfy the future 
obligations related to these acquisitions. In October 1998, the Company made 
the first $500,000 payment against this obligation and will make the final 
$500,000 payment in October 1999.


                                        52
<PAGE>

5.   DEVELOPMENT AND COMMERCIALIZATION AGREEMENT WITH WYETH-AYERST LABORATORIES

In May 1997, the Company entered into a development and commercialization 
agreement for Co 2-6749, its lead anxiolytic compound, with the Wyeth-Ayerst 
Laboratories Division ("Wyeth-Ayerst") of American Home Products Corporation 
("AHP"). Under the terms of the agreement, Wyeth-Ayerst paid CoCensys a 
non-refundable $5.0 million licensing fee and AHP paid $5.0 million to 
purchase 100,000 shares of the Company's Series C Convertible Preferred 
Stock. Additionally, CoCensys will receive specified milestone payments 
dependent upon the achievement of key development events and $750,000 per 
quarter for up to three years to identify back-up compounds. However, if Co 
2-6749 fails to meet certain criteria, and the back-up program fails to 
produce a back-up compound that meets other certain criteria, Wyeth-Ayerst 
has the right to terminate the back-up program and require CoCensys to 
reimburse it for a portion of the back-up funding. As of December 31, 1998, 
the Company had $2.6 million recorded as deferred revenue related to the 
Wyeth-Ayerst back-up program; this deferred amount will be recognized as 
revenue when Co 2-6749 or a back-up compound meets applicable criteria for 
acceptance by Wyeth-Ayerst.

Wyeth-Ayerst is responsible for the costs associated with developing Co 
2-6749. Wyeth-Ayerst and the Company will co-promote any resulting product in 
certain market segments in the United States, while Wyeth-Ayerst will have 
rights to develop, register and market any drugs derived from the 
collaboration in the rest of the world, subject to royalty obligations to 
CoCensys. The preferred stock is convertible into common stock after May 12, 
1999, at the election of Wyeth-Ayerst, at a conversion price based on the 
market price of the common stock at that time (subject to certain minimum and 
maximum limits).

6.   MARKETING AND DEVELOPMENT COLLABORATION WITH WARNER-LAMBERT COMPANY

In October 1995, the Company entered into a collaboration with Warner-Lambert 
Company ("Warner-Lambert") and its Parke-Davis division to develop and market 
therapeutic drugs for the treatment of certain central nervous system 
disorders. This arrangement consists of the Research, Development and 
Marketing Collaboration Agreement (the "1995 Warner Collaboration 
Agreement"), for the worldwide development and commercialization of a new 
class of neurological and psychiatric drugs, termed subtype selective NMDA 
receptor antagonists ("SSNRAs"), and the Parke-Davis Promotion Agreement. 
Pursuant to the Parke-Davis Promotion Agreement, the Company co-promoted 
Parke-Davis' central nervous system drug, Cognex(R), until June 1997 when 
Parke-Davis terminated the co-promotion agreement. In October 1997, the 1995 
Warner Collaboration Agreement was amended, restated and extended until 
October 1999 (the "1997 Amended Warner Collaboration Agreement").

Under the 1997 Amended Warner Collaboration Agreement, both companies share 
technology and resources to develop SSNRA candidates. The parties are 
obligated to make specified contributions to development costs with respect 
to any development candidates. Promotion costs of, and profits from any 
products developed under the agreement will be shared equally in the United 
States and Japan. Warner-Lambert will have the exclusive right to develop and 
market any product, at its own cost, for markets outside the United States 
and Japan, subject to a specified royalty payment to the Company. 
Warner-Lambert is obligated to pay its specified portion of the development 
costs and to make certain milestone payments, upon achievement of certain 
clinical development and regulatory milestones, for each development 
compound. Payments received under both the 1995 Warner Collaboration 
Agreement 1997 Amended Warner Collaboration Agreement are recognized as 
co-development revenues and payments made are recognized as expenses.


                                        53
<PAGE>

Pursuant to the 1995 Warner Collaboration Agreement, Warner-Lambert purchased 
$2.0 million of CoCensys Common Stock in October 1995 and an additional $2.0 
million of CoCensys Common Stock in March 1997. Pursuant to the 1997 Amended 
Warner Collaboration Agreement extension of the Warner Collaboration 
Agreement, Warner-Lambert purchased 14,286 shares of the Company's Series C 
Convertible Preferred Stock for $1.0 million in October 1997 and an 
additional 85,714 shares of the same series of convertible preferred stock 
for $6.0 million in January 1998.

As part of the extension of the Warner Collaboration Agreement in October 
1997, the companies agreed to expand the collaboration to allow the companies 
to analyze and consider for collaborative development each company's AMPA 
modulator technologies. In January 1998, the parties agreed to return the 
focus of their collaboration agreement solely to SSNRAs. Each party retained 
all rights to its respective AMPA modulator technology. In addition, as part 
of removal of the AMPA modulator technology from the Warner Collaboration 
Agreement, the Company is obligated to pay to Warner-Lambert $1 million on 
December 31, 1999. The due date for this amount, which originally was January 
1999, has been extended to December 31, 1999 and is payable in common stock 
(based on the then current stock price) or cash at the election of 
Warner-Lambert and is secured by the Company's assets.

7.   DEVELOPMENT AND COMMERCIALIZATION AGREEMENT WITH G.D. SEARLE & CO.

In May 1996, the Company entered into an agreement with G.D. Searle & Co. 
("Searle") to co-develop and co-promote CCD 3693, the Company's lead compound 
for the treatment of insomnia along with its back-up compounds. Pursuant to 
the agreement, Searle paid a $3.0 million license fee and purchased 100,000 
shares of the Company's Series B Convertible Preferred Stock for $7.0 
million. The license fee was recognized as co-development revenue in 1996. In 
May 1998, the Series B Convertible Preferred Stock converted, in accordance 
with its terms, into 1.6 million shares of common stock at a conversion price 
of $4.375 per share.

In July 1998, Searle notified CoCensys that it had decided not to participate 
further in the development of the Company's proprietary compounds for the 
treatment of insomnia. CoCensys intends to continue research and development 
of its compounds to treat insomnia and will seek a new partner for the 
program in the future.

8.   PROMOTION AGREEMENT WITH SOMERSET PHARMACEUTICALS, INC.

In January 1996, the Company and Somerset Pharmaceuticals, Inc. ("Somerset") 
entered into the Somerset Promotion Agreement, pursuant to which the Company, 
through its Sales Division, promoted Somerset's drug Eldepryl(R) to 
neurologists in the United States for the treatment of Parkinson's disease. 
Effective January 1, 1997, the initial agreement was superseded by the 1997 
Somerset Promotion Agreement. Under the 1997 Somerset Promotion Agreement, 
CoCensys had the exclusive right to detail Eldepryl to certain neurologists 
and other physicians in the United States and was compensated based upon the 
number of details undertaken and gross sales of Eldepryl. In October 1997 the 
Company sold its sales and marketing division, and all related co-promotion 
agreements, to Watson.



                                        54
<PAGE>


9.   MARKETING AND DEVELOPMENT COLLABORATION WITH NOVARTIS PHARMA, A.G.

In May 1994, the Company entered into a marketing and development 
collaboration with Novartis Pharma, A.G. (formerly Ciba-Geigy Limited) 
("Novartis") for the co-promotion by the Company of certain Novartis products 
and the development and commercialization of ACEA 1021, a compound being 
developed by the Company. This collaboration consisted of the Novartis 
Promotion Agreement and the Novartis Research and Development Agreement.

Pursuant to the Novartis Promotion Agreement, CoCensys established a sales 
force to co-promote and market certain Novartis products in the United States 
initially to psychiatrists. The agreement provided for the advance of funds 
to the Company to cover a portion of the expenses incurred by the CoCensys 
sales force in promoting the Novartis products. CoCensys realized 
co-promotion revenues from its share of sales of Novartis products above 
certain baseline levels specified in the contract. The Novartis Promotion 
Agreement terminated at the end of 1996.

In connection with the Novartis Research and Development Agreement, Novartis 
purchased $7.0 million of CoCensys common stock and agreed to make certain 
nonrefundable milestone payments in connection with specified events in the 
course of the development of ACEA 1021. In April 1999, Novartis advised the 
Company that it would not continue the development of ACEA 1021, and the 
agreement terminated effective October 1999. The Company is seeking a new 
partner to develop ACEA 1021. There can be no assurance that the Company will 
be able to secure another partner to continue the development of this 
compound.

10.  COMMITMENTS AND CONTINGENCIES

LEASE COMMITMENTS

The Company leases office and research facilities and certain equipment under 
operating leases and capital leases with varying terms extending through July 
2002. Annual future minimum payments under operating and capital leases as of 
December 31, 1998, are as follows (in thousands):

<TABLE>
<CAPTION>
                                                            OPERATING          CAPITAL
                                                              LEASES            LEASES
                                                            ----------        ----------
<S>                                                         <C>               <C>
Year ending December 31,
   1999                                                     $      890        $      372
   2000                                                            886               320
   2001                                                            879                72
   2002                                                            548                 -
                                                            ----------        ----------

Total minimum payments                                      $    3,203               764
                                                            ----------        
                                                            ----------        
Less amount representing interest                                                    (82)
                                                                              ----------
Present value of future minimum payments                                             682
Current portion                                                                     (316)
                                                                              ----------
Long-term portion                                                             $      366
                                                                              ----------
                                                                              ----------
</TABLE>

Rent expense for the years ended December 31, 1998, 1997 and 1996 was
$1,006,000, $1,040,000, and $1,082,000, respectively.


                                        55
<PAGE>

CONTINGENT BONUSES

In December 1998, the Board of Directors approved a broad-based 1999 employee
bonus program whereby an aggregate of approximately $390,000 may be paid to
employees contingent upon the occurrence of certain events.

11.  COMMON STOCK

The Company has reserved 12.8 million shares of common stock for issuance 
upon exercise of options and warrants, for issuance under the 1995 Employee 
Stock Purchase Plan and for conversion of all preferred stock except the 
Series E Preferred. The Series E Preferred is convertible at a rate based on 
the market price of the common stock and is not subject to a minimum 
conversion price. Based on the December 31, 1998 closing price for the 
Company's common of $0.3125 per share, the Series E Preferred outstanding at 
year end, including accrued dividends, was convertible into 23.9 million 
shares of common stock.

STOCKHOLDER RIGHTS PLAN

In April 1995, the Company adopted a Stockholder Rights Plan (the "Plan") 
which provides for the distribution of rights ("Rights") to holders of 
outstanding shares of common stock. Pursuant to the Plan, a portion of 
Convertible Preferred Stock was designated as Junior Preferred Stock, of 
which 350,000 shares were reserved for issuance upon exercise of the Rights. 
The Rights will become exercisable only in the event, with certain 
exceptions, that an acquiring party accumulates or announces an offer to 
acquire 20 percent or more of the Company's voting stock. Each Right entitles 
the holder to buy one-hundredth of a share of Junior Preferred Stock at a 
price of $25. In addition, upon the occurrence of certain events, holders of 
Rights will be entitled to purchase either CoCensys' stock or shares in an 
"acquiring entity" at half of market value. The Company will generally be 
entitled to redeem the Rights at $.001 per right at any time until the tenth 
day following acquisition of a 20 percent position in its voting stock. The 
Rights expire in April 2005.

12.  STOCK OPTION PLANS

The Company has elected to follow Accounting Principles Board Opinion No. 25, 
"Accounting for Stock Issued to Employees" ("APB 25") and related 
Interpretations in accounting for its employee stock options because, as 
discussed below, the alternative fair value accounting provided under SFAS 
No. 123 requires use of option valuation models that were not developed for 
use in valuing employee stock options. Under APB 25, for certain options the 
Company recognizes as deferred compensation expense the excess of fair market 
value of the common stock at the date of grant over the aggregate exercise 
price of such options. This deferred compensation expense is amortized 
ratably over the vesting period of each option. During the years ended 
December 31, 1998, 1997 and 1996, the Company recorded deferred compensation 
of $223,000, $579,000 and $629,000, respectively, in connection with the 
issuance and termination of certain stock options.


                                        56
<PAGE>

Pro forma information regarding net income and earnings per share is required 
by SFAS No. 123, and has been determined as if the Company has accounted for 
its employee stock options under the fair value method of that Statement. Had 
compensation cost for the Company's grants since 1995 under the stock-based 
compensation plans been determined based on SFAS No. 123, the Company's pro 
forma net income, and pro forma diluted earnings per share for the years 
ending December 31, would be as follows (in thousands except per share data):

<TABLE>
<CAPTION>
                                                                          YEARS ENDED DECEMBER 31,      
                                                                  ----------------------------------------
                                                                     1998            1997           1996  
                                                                  ---------       ---------      ---------
        <S>                                                       <C>             <C>            <C>
        Net loss                                                  $ (19,516)      $ (17,974)     $ (19,745)
                                                                  ---------       ---------      ---------
                                                                  ---------       ---------      ---------
        Net loss per share                                        $  ($0.80)      $  ($0.80)     $   (0.91)
                                                                  ---------       ---------      ---------
                                                                  ---------       ---------      ---------
</TABLE>

The effects of applying SFAS No. 123 in this pro forma disclosure are not
indicative of future amounts. SFAS 123 does not apply to awards prior to 1995,
and additional awards in future years are anticipated. The fair value for these
options was estimated at the date of grant using the Black-Scholes
option-pricing model with the following assumptions:

<TABLE>
<CAPTION>
                                                                            YEARS ENDED DECEMBER 31,      
                                                                      1998           1997            1996  
                                                                  ---------       ----------     ----------
        <S>                                                       <C>             <C>            <C>
        Expected dividend yield                                         0.0%            0.0%           0.0%
        Expected stock price volatility                                85.0%           72.1%          44.2%
        Risk-free interest rate                                         4.8%            6.1%           6.2%
        Expected option term                                       4.5 years       4.6 years      5.0 years
</TABLE>


                                        57
<PAGE>


A summary of the Company's stock option activity, including those issued outside
of plans, and related information is as follows (in thousands, except per share
amounts):

<TABLE>
<CAPTION>
                                                                                           WEIGHTED-
                                  AVAILABLE      SHARES          OPTION       AGGREGATE     AVERAGE
                                     FOR          OUT-            PRICE        EXERCISE     EXERCISE
                                    GRANT       STANDING        PER SHARE       PRICE        PRICE
                                  ----------    --------      -------------   ---------    ---------
<S>                               <C>           <C>           <C>             <C>          <C>
BALANCE, DECEMBER 31, 1995            699         2,409       $0.05 - $8.13     $7,195      $2.99
         Authorized                 3,800             -             -                -          -
         Granted                     (963)          963       $3.25 - $9.13      5,719       5.94
         Exercised                      -          (139)      $0.20 - $5.21       (193)      1.39
         Canceled and forfeited       184          (184)      $0.50 - $8.38       (943)      5.12
                                   ------        ------                        -------
BALANCE, DECEMBER 31, 1996          3,720         3,049       $0.05 - $9.13     11,778       3.86
         Granted                   (1,703)        1,703       $3.00 - $7.13      8,698       5.11
         Exercised                  -              (315)      $0.05 - $5.21       (199)      0.63
         Canceled and forfeited       209          (209)      $2.50 - $8.38     (1,114)      5.37
                                   ------        ------                        -------
BALANCE, DECEMBER 31, 1997          2,226         4,228       $0.05 - $9.13     19,163       4.53
         Authorized                 2,000             -             -                -          -
         Retired                     (652)            -             -                -          -
         Granted                   (1,961)        1,961       $0.25 - $3.88      3,107       1.58
         Exercised                      -          (164)      $0.13 - $3.29        (49)      0.30
         Canceled and forfeited     1,164        (1,164)      $1.53 - $9.13     (5,199)      4.48
                                   ------        ------                        -------
BALANCE, DECEMBER 31, 1998          2,777         4,861       $0.05 - $9.13    $17,022      $3.50
                                   ------        ------                        -------
                                   ------        ------                        -------
</TABLE>

The weighted-average fair value of options granted was $1.59, $3.06 and $3.25
during 1998, 1997 and 1996, respectively. The weighted-average remaining
contract life was 6.4 years, 7.3 years and 6.8 years for 1998, 1997 and 1996,
respectively.

The following table summarizes information about stock options outstanding at
December 31, 1998:

<TABLE>
<CAPTION>
         RANGE                                                     WEIGHTED                           WEIGHTED
          OF                  NUMBER             REMAINING         AVERAGE          NUMBER             AVERAGE
       EXERCISE             OUTSTANDING         CONTRACTUAL        EXERCISE       EXERCISABLE         EXERCISE
         PRICES           (IN THOUSANDS)           LIFE             PRICE        (IN THOUSANDS)         PRICE  
   --------------         --------------        -----------        --------      --------------       --------
   <S>                    <C>                   <C>                <C>           <C>                  <C>
   $ 0.05 to 1.50              2,029                7.2            $  0.87             838             $ 0.57
     2.03 to 3.00                163                5.7               2.60             133               2.60
     3.07 to 4.50                873                7.5               3.52             446               3.49
     4.63 to 9.13              1,801                5.6               6.53           1,397               6.56
</TABLE>


Options to purchase approximately 2.8 million, 1.9 million and 1.5 million 
shares of common stock were exercisable as of December 31, 1998, 1997 and 
1996, respectively.

1990 STOCK OPTION PLAN

Under the Company's 1990 Stock Option Plan, as amended, options granted to 
purchase common stock of the Company may be either incentive stock options to 
employees or nonqualified stock options to employees, directors or 
consultants, at the discretion of the Board of Directors. The plan permits 
the Company to grant incentive stock options at 100% of the fair value at the 
date of grant, while statutory 


                                        58
<PAGE>

stock options may be granted at 50% of the fair value at the grant date. 
Options granted to date generally vest at the rate of 25% of the total shares 
upon the first anniversary of the vesting commencement date, and 2.08% of the 
total shares per month thereafter. Vesting begins on either the grant date 
or, if different, on the vesting commencement date specified by the Board of 
Directors. Such vesting is subject to continued employment with the Company. 
The options expire ten years from the date of grant or 90 days from 
termination, if sooner.

1992 NON-EMPLOYEE DIRECTORS' STOCK OPTION PLAN

In December 1992, the Company adopted the 1992 Non-Employee Directors' Stock 
Option Plan (the "Directors' Plan"), as amended, to provide for the automatic 
grant of options to purchase shares of common stock to non-employee directors 
of the Company. Each such director is granted an option to purchase 20,000 
shares of common stock (40,000 shares for the Chairman of the Board). At the 
beginning of each fiscal year, each non-employee director will be granted an 
option to purchase an additional 8,000 shares of common stock (12,000 for the 
Chairman). Vesting on the initial grant occurs in five equal annual 
installments from the date of the grant for each year that the optionee 
remains a director. Annual grants vest in full one year from the date of 
grant. Vesting accelerates upon certain changes in ownership of the Company. 
The exercise price of options under the Directors' Plan must equal or exceed 
the fair market value of the common stock on the date of the grant.

1995 EMPLOYEE STOCK PURCHASE PLAN

In March 1995, the Company adopted the 1995 Employee Stock Purchase Plan and 
reserved 350,000 shares of common stock for issuance thereunder. In June 
1997, the Company reserved an additional 200,000 shares for issuance under 
the plan, which was approved by shareholders in June 1998. Pursuant to the 
provision of the plan, employees purchased 136,436, 90,900 and 112,743 shares 
of common stock in 1998, 1997 and 1996, respectively, at $0.24 to $7.12 per 
share.

1996 EQUITY INCENTIVE PLAN

In December 1996, the Company adopted the 1996 Equity Incentive Plan to 
provide for the issuance of stock options, restricted stock, stock bonuses 
and stock appreciation rights to employees, directors or consultants, at the 
discretion of the Board of Directors. The plan permits the Company to grant 
incentive stock options at 100% of the fair value at the date of grant, while 
nonqualified stock options may be granted at 85% of the fair value at the 
grant date. Options granted will generally vest at the rate of 25% of the 
total shares upon the first anniversary of the vesting commencement date, and 
2.08% of the total shares per month thereafter. Vesting will begin on either 
the grant date or, if different, on the vesting commencement date specified 
by the Board of Directors. Such vesting will be subject to continued 
employment with the Company. The options will expire ten years from the date 
of grant or 90 days from termination, if sooner. The Company has reserved 2.8 
million shares of common stock for issuance under this plan.

1998 NON-OFFICER EQUITY INCENTIVE PLAN

In September 1998, the Company adopted the 1998 Non-Officer Equity Incentive 
Plan to provide for the issuance of stock options, restricted stock and stock 
bonuses to employees or consultants, at the discretion of the Board of 
Directors. Officers of the Company are not eligible to receive any benefits 
under this plan. The plan permits the Company to grant nonqualified stock 
options with an exercise price of not less than 85% of the fair value at the 
grant date. Options granted will generally vest at the rate of 25% of the 
total shares upon the first anniversary of the vesting commencement date, and 
2.08% of the 


                                        59
<PAGE>

total shares per month thereafter. Vesting will begin on either the grant 
date or, if different, on the vesting commencement date specified by the 
Board of Directors. Such vesting will be subject to continued employment with 
the Company. The options will expire ten years from the date of grant or 90 
days from termination, if sooner. The Company has reserved 2.0 million shares 
of common stock for issuance under this plan.

OTHER OPTIONS AND WARRANTS

In September 1990, the Company granted to a director of the Company an option 
to purchase 20,000 shares of common stock at $.05 per share, outside of any 
plans. The option is fully vested and expires in September 2001, or three 
months after termination as a director, if sooner.

In November 1995, the Company granted to an officer of the Company an option 
to purchase 25,000 shares of common stock at $.50 per share, outside of any 
plans. The option is fully vested and expires in November 2005.

In connection with the June 1994 purchase of Acea Pharmaceuticals, Inc., the 
Company issued warrants to purchase 31,982 shares of common stock at $0.04 
per share. The warrants were exercised on October 2, 1998.

In July 1992, the Company issued a warrant to purchase 42,000 shares of 
common stock at $5.00 per share in connection with a capital lease agreement. 
The warrant expires in July 2002.

As part of a private offering in June 1995 that included the sale of 3.7 
million shares of common stock, the Company issued 1.5 million warrants. Each 
warrant entitles the holder to purchase one share of common stock at a 
pre-determined price ranging from $3.90 per share to $4.40 per share during 
the five-year exercise period. As of December 31, 1998, approximately 1.4 
million of these warrants were outstanding.

As discussed above in Note 2, as part of a private offering in June 1998 that 
included the sale of $8.0 million of convertible preferred stock, the Company 
issued warrants in June 1998 to purchase 350,000 shares of common stock at 
$4.50 per share and in November 1998 issued warrants to purchase100,000 
shares at $0.63 per share.

13.  DEFERRED INCOME TAXES

Deferred income taxes reflect the net tax effect of temporary differences 
between the carrying amount of assets and liabilities for financial reporting 
purposes and the amounts used for income tax purposes.


                                        60
<PAGE>



Significant components of the Company's deferred tax assets and liabilities at
December 31, are as follows (in thousands):

<TABLE>
<CAPTION>
                                                                                1998                1997  
                                                                             ---------           ---------
        <S>                                                                  <C>                 <C>
        DEFERRED TAX LIABILITIES
          Book/tax depreciation difference                                   $    (117)          $     (161)
                                                                             ---------           ----------
              Total deferred tax liabilities                                      (117)                (161)
        DEFERRED TAX ASSETS
          Net operating loss carryovers                                         32,797               27,860
          Research and development credit carryovers                             5,704                4,822
          Capitalized state research and development costs                       6,301                5,376
          Other                                                                     92                  152
                                                                             ---------           ----------
            Total deferred tax assets                                           44,894               38,210
        Valuation allowance for deferred tax assets                            (44,777)             (38,049)
                                                                             ---------           ----------
        Net deferred tax assets                                                    117                  161
                                                                             ---------           ----------
        Net deferred taxes                                                   $       -           $        -
                                                                             ---------           ----------
                                                                             ---------           ----------
</TABLE>

At December 31, 1998, the Company had operating loss carryovers of approximately
$96 million for federal income tax purposes. The federal loss carryovers begin
to expire in 2004. For federal and California income tax purposes, the Company
also had unused research and development credits of approximately $4.0 million
and $1.7 million respectively, which expire beginning in 2004. The difference
between the financial reporting and tax loss carryforwards for California
purposes is attributable to the capitalization of research and development
expenses and the 50% limitation on loss carryforwards for California tax
purposes.

The Tax Reform Act of 1986 includes provisions which significantly limit 
potential use of net operating losses and tax credit carryovers in situations 
where there is a change in ownership, as defined in Internal Revenue Code 
Section 382, of more than 50% during a three-year period. Accordingly, if a 
change in ownership occurs, the ultimate benefit realized from these 
carryovers may be significantly reduced in total, and the amount that may be 
utilized in any given year may be significantly limited. California has 
enacted similar legislation. The Company has had stock issuances and an 
ownership change occurred as a result of the Acea acquisition in June 1994. 
The annual limitation is approximately $2.4 million on accumulated net 
operating losses of approximately $24.6 million.

14.  EMPLOYEE SAVINGS PLAN

The Company has an employee savings plan that permits participants to make
contributions by salary reduction pursuant to section 401(k) of the Internal
Revenue Service. During 1996, the Company began matching 50% of a participant's
contribution up to a maximum participant contribution of 4% of eligible
compensation. In connection with this matching contribution, the Company
recognized expense of $63,000, $176,000 and $51,000 in 1998, 1997 and 1996,
respectively.


                                        61
<PAGE>

15.  BUSINESS SEGMENTS

Effective January 1, 1998, the Company adopted Statement of Financial Accounting
Standards No. 131, "Disclosures about Segments of an Enterprise and Related
Information" (SFAS 131), which superseded Statement of Financial Accounting
Standards No. 14, "Financial Reporting for Segments of a Business Enterprise."
SFAS No. 131 also establishes standards for related disclosures about products
and services, geographic areas and major customers. The adoption of SFAS 131 did
not affect results of operations or financial position, but did affect the
following disclosure of segment information.

Historically, the Company has operated in two business segments, drug 
promotion and drug development. Promotion revenues arise from contractual 
agreements under which the Company promotes other pharmaceutical companies' 
products in return for commissions. Development revenues arise from 
contractual agreements with large pharmaceuticals companies pursuant to which 
the Company licenses various commercialization or development rights relating 
to compounds or performs research activities in exchange for licensing fees, 
milestone payments or research funding. In October 1997, the Company sold its 
sales and marketing division to Watson and ceased all drug promotion 
activities. The accounting policies of these segments are the same as those 
described in the summary of significant accounting policies except that 
interest income and certain expenses are not allocated to the segments. 
Assets allocated to the segments include only other current and noncurrent 
assets and net property and equipment.

Selected financial information for the Company's business segments as of and 
for the years ended December 31, 1998, 1997 and 1996 follows (in thousands):

<TABLE>
<CAPTION>
                                         1998             1997              1996    
                                    -------------     -------------    -------------
<S>                                 <C>               <C>              <C>
Revenues from external partners
    Drug promotion segment          $         540     $       3,264    $       9,085
    Drug development segment                2,046             8,650            6,073
                                    -------------     -------------    -------------
                                    $       2,586     $      11,914    $      15,158
                                    -------------     -------------    -------------
                                    -------------     -------------    -------------
Operating income
    Drug promotion segment          $         540     $      (4,408)   $      (3,140)
    Drug development segment              (17,593)          (16,961)         (16,513)
                                    -------------     -------------    -------------
                                    $     (17,053)    $     (21,369)   $     (19,653)
                                    -------------     -------------    -------------
                                    -------------     -------------    -------------
Assets
    Drug promotion segment          $           -     $           -    $         605
    Drug development segment                2,819             3,364            2,663
                                    -------------     -------------    -------------
                                    $       2,819     $       3,364    $       3,268
                                    -------------     -------------    -------------
                                    -------------     -------------    -------------
Depreciation and amortization
    Dug promotion segment           $           -     $          29    $         738
    Drug development segment                  907               907            1,334
                                    -------------     -------------    -------------
                                    $         907     $         936    $       2,072
                                    -------------     -------------    -------------
                                    -------------     -------------    -------------
Expenditures for long-lived assets
    Drug promotion segment          $           -     $         121    $          80
    Drug development segment                  566             1,354              732
                                    -------------     -------------    -------------
                                    $         566     $       1,475    $         812
                                    -------------     -------------    -------------
                                    -------------     -------------    -------------
</TABLE>

In fiscal 1998, three partners represented 96 percent of revenues. In fiscal
1997, three partners represented 88 percent of revenues. In fiscal 1996, four
partners represented 100 percent of revenue.


                                        62

<PAGE>

                                                                    Exhibit 23.1

                 Consent of Independent Auditors

We consent to the incorporation by reference in the Registration Statements 
(Forms S-3 Nos. 33-83050, 33-97136 and 333-58663) of CoCensys, Inc. and in 
the related Prospectuses; and in the Registration Statements (Forms S-8 Nos. 
33-97260, 33-97258, 333-07855, 333-21761, 333-31013 and 333-70435) of 
CoCensys, Inc., of our report dated January 29, 1999 (except for the last 
paragraph of Note 2 as to which the date is March 24, 1999), with respect to 
the financial statements of CoCensys, Inc. included in the Annual Report 
(Form 10-K) for the year ended December 31, 1998.

ERNST & YOUNG LLP
Orange County, California
March 31, 1999

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                           2,222
<SECURITIES>                                     9,973
<RECEIVABLES>                                       29
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                12,516
<PP&E>                                           6,884
<DEPRECIATION>                                   4,418
<TOTAL-ASSETS>                                  15,099
<CURRENT-LIABILITIES>                            7,201
<BONDS>                                              0
                                0
                                     16,386
<COMMON>                                       107,381
<OTHER-SE>                                   (116,261)
<TOTAL-LIABILITY-AND-EQUITY>                    15,099
<SALES>                                              0
<TOTAL-REVENUES>                                 2,586
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  81
<INCOME-PRETAX>                               (15,226)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (15,226)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (15,226)
<EPS-PRIMARY>                                  (0.700)
<EPS-DILUTED>                                  (0.700)
        

</TABLE>


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