COCENSYS INC
S-3, 1998-07-08
PHARMACEUTICAL PREPARATIONS
Previous: CARRAMERICA REALTY CORP, 8-K/A, 1998-07-08
Next: MORGAN STANLEY DEAN WITTER & CO, 424B3, 1998-07-08



<PAGE>

                                               REGISTRATION NO. 333-
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
                     SECURITIES AND EXCHANGE COMMISSION
                          Washington, D.C. 20549

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

                                 FORM S-3
                          REGISTRATION STATEMENT
                                  UNDER
                        THE SECURITIES ACT OF 1933

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

                              COCENSYS, INC.
        (Exact name of Registrant as specified in its charter)

              DELAWARE                                 33-0538836
  (State or other jurisdiction of            (I.R.S. Employer Identification
    incorporation or organization)                       Number)

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

                           201 TECHNOLOGY DRIVE
                             IRVINE, CA 92618
                              (949) 753-6100
 (Address, including zip code, and telephone number, including area code, 
               of registrant's principal executive offices)

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

                           F. RICHARD NICHOL, PH.D.
                    PRESIDENT AND CHIEF EXECUTIVE OFFICER
                             201 TECHNOLOGY DRIVE
                               IRVINE, CA 92618
                                (949) 753-6100
          (Name, address, including zip code, and telephone number, 
                 including area code, of agent for service)

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

                                COPIES TO:

        ANDREA VACHSS, ESQ.                         ROBERT HOLMEN, ESQ.
        COOLEY GODWARD LLP                            COCENSYS, INC.
       FIVE PALO ALTO SQUARE                       201 TECHNOLOGY DRIVE
        3000 EL CAMINO REAL                          IRVINE, CA 92618
  PALO ALTO, CALIFORNIA 94306-2155                    (949) 753-6100
         (650) 843-5000

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

      Approximate date of commencement of proposed sale to the public:
 AS SOON AS PRACTICABLE AFTER THIS REGISTRATION STATEMENT BECOMES EFFECTIVE.

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

     If the only securities being registered on this Form are being offered 
pursuant to dividend or interest reinvestment plans, please check the 
following box.  / /

     If any of the Securities being registered on this Form are to be offered 
on a delayed or continuous basis pursuant to Rule 415 under the Securities 
Act of 1933, check the following box. /X/

     If this Form is filed to register additional securities for an offering 
pursuant to Rule 462(b) under the Securities Act, please check the following 
box and list the Securities Act registration statement number of the earlier 
effective registration statement for the same offering.  / /

     If this Form is a post-effective amendment filed pursuant to Rule 462(c) 
under the Securities Act, check the following box and list the Securities Act 
registration statement number of the earlier effective registration statement 
for the same offering.  / /

     If delivery of the Prospectus is expected to be made pursuant to Rule 
434, please check the following box. / /

                          CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------------------
    TITLE OF CLASS OF          AMOUNT TO BE             PROPOSED MAXIMUM              PROPOSED MAXIMUM               AMOUNT OF
SECURITIES TO BE REGISTERED     REGISTERED          OFFERING PRICE PER SHARE (3)   AGGREGATE OFFERING PRICE (3)   REGISTRATION FEE
- ----------------------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------------------
<S>                           <C>                              <C>                          <C>                       <C>
Common Stock, $0.001 
  par value per share         6,030,000 shares (1)             $2.44                       $14,713,200                $4,341
- ----------------------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------------------
Common Stock, $0.001 
  par value per share          350,000 shares (2)              $4.50                        $1,575,000                  $465
- ----------------------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------------------
   TOTAL                                                                                                              $4,806
- ----------------------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)  Includes (i) up to 6,030,000 shares of Common Stock to be issued upon 
     conversion of the Company's Series E Convertible Preferred Stock (the 
     "Preferred Stock") and (ii) an indeterminate number of additional shares 
     of Common Stock as may from time to time become issuable upon conversion 
     of the Preferred Shares by reason of stock splits, stock dividends and 
     antidilution provisions (including floating conversion prices), which 
     shares are registered hereunder pursuant to Rule 416 under the 
     Securities Act.  For purposes of estimating the number of shares of 
     Common Stock to be included in the Registration Statement, the Company 
     calculated the number of shares of Common Stock issuable upon conversion 
     of the Preferred Stock using a conversion price of $1.67 per share, 
     which is below the conversion price as of July 2, 1998 ($2.50) and was 
     arbitrarily selected.

(2)  Includes (i) up to 350,000 shares of Common Stock to be issued upon 
     exercise of Common Stock Purchase Warrants (the "Warrants") and (ii) an 
     indeterminate number of additional shares of Common Stock as may from 
     time to time become issuable upon exercise of the Warrants by reason of 
     stock splits, stock dividends and antidilution provisions, which shares 
     are registered hereunder pursuant to Rule 416 under the Securities Act.

(3)  Estimated solely for the purpose of calculating the registration fee in 
     accordance with Rule 457 under the Securities Act.   The prices per 
     share and aggregate offering prices are based on (i) with respect to 
     6,030,000 shares of Common Stock issuable upon conversion of Preferred 
     Stock, the average of the high and low prices of the Registrant's Common 
     Stock on July 2, 1998 as reported on the Nasdaq Stock Market and (ii) 
     with respect to 350,000 shares of Common Stock issuable upon exercise of 
     Warrants, the exercise price of the Warrants.

     THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR 
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT 
SHALL FILE A FURTHER AMENDMENT THAT SPECIFICALLY STATES THAT THIS 
REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH 
SECTION 8(a) OF THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION 
STATEMENT SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING 
PURSUANT TO SAID SECTION 8(a), MAY DETERMINE. 

<PAGE>

INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A 
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE 
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY 
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT 
BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR 
THE SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE 
SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE 
UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF 
ANY SUCH STATE.

<PAGE>

                      SUBJECT TO COMPLETION, DATED JULY 8, 1998

PROSPECTUS

                                6,380,000 SHARES
                                          
                                 COCENSYS, INC.
                                  COMMON STOCK
                                          
     This Prospectus relates to the resale from time to time by the holders 
listed herein (collectively, the "Selling Stockholders") of (i) up to 
6,380,000 shares of Common Stock, par value $0.001 per share (the "Common 
Stock"), of CoCensys, Inc. ("CoCensys" or the "Company") consisting of (a) up 
to 6,030,000 shares of Common Stock to be issued from time to time to the 
Selling Stockholders upon conversion of the Company's Series E Convertible 
Preferred Stock (the "Preferred Stock") and (b) up to 350,000 shares of 
Common Stock to be issued and sold upon exercise of Common Stock Purchase 
Warrants (the "Warrants"), and (ii) in accordance with Rule 416 under the 
Securities Act of 1933, as amended (the "Securities Act"), such currently 
indeterminate number of additional shares of Common Stock as may from time to 
time become issuable upon conversion of the Preferred Stock and exercise of 
the Warrants by reason of stock splits, stock dividends, fluctuation in the 
conversion price of the Preferred Stock and other adjustments in accordance 
with the terms of the Preferred Stock and the Warrants (collectively, the 
"Shares"). 

     The Company sold 8,000 shares of Preferred Stock (the "Initial Shares") 
and Warrants to purchase 350,000 shares of Common Stock for an aggregate 
purchase price of $8 million on June 8, 1998 in a private placement to 
accredited investors in a transaction exempt from the registration 
requirements of the Securities Act.  If, during the period beginning 90 days 
after the effective date of the Registration Statement of which this 
Prospectus forms a part and ending 360 days thereafter, the closing price of 
the Common Stock is greater than $3.75 per share for 10 consecutive trading 
days, the Company is obligated to sell, and the purchasers of the Initial 
Shares are obligated to purchase, an additional 2,000 shares of Preferred 
Stock for an aggregate price of $2 million. On November 8, 1998, each 
purchaser of Initial Shares shall receive its pro rata portion of warrants 
to purchase 100,000 shares of Common Stock (the "Additional Warrants") so 
long as 65% of the Initial Shares purchased by such purchaser is outstanding. 
The exercise price of the Additional Warrants shall be 125% of the closing 
price of the Common Stock on such date.  The balance of the Preferred Stock, 
the Additional Warrants and the Common Stock to be issued upon conversion of 
the Preferred Stock and exercise of the Warrants and the Additional Warrants 
will be issued in transactions exempt from the registration requirements of 
the Securities Act.  See "Recent Developments."  The Shares are being 
registered by the Company pursuant to registration rights granted to the 
Selling Stockholders.
     
     Issuance by the Company of shares of Common Stock upon conversion of 
Preferred Stock and exercise of Warrants in excess of an aggregate of  
4,916,480 shares is subject to the Company's compliance with Rule 4460(i) of 
the Nasdaq Stock Market, which would require approval of the Company's 
stockholders prior to such issuance.  In the event such approval is not 
obtained, the Company will be required to redeem shares of Preferred Stock 
that would be convertible into shares of Common Stock in excess of such 
limitation.
     
     The Selling Stockholders, or their respective pledgees, donees, 
transferees or other successors in interest, directly or through agents, 
broker-dealers or underwriters, may sell the Shares offered hereby from time 
to time on terms determined at the time of sale.  Such sales may be effected 
in transactions on the Nasdaq National Market, in privately negotiated 
transactions, through the writing of options on the Shares, short sales or by 
a combination of such methods of sale, at such fixed prices as may be 
negotiated from time to time, at market prices prevailing at the time of 
sale, at prices related to such prevailing market prices or at negotiated 
prices.  Any agents, broker-dealers or underwriters that participate in the 
distribution of the Shares hereby may receive compensation in the form of 
discounts, concessions or commissions from the Selling Stockholders or the 
purchasers of the Shares for whom such broker-dealers may act as agent or to 
whom they sell as principal or both (which compensation to a particular 
agent, broker-dealer, or underwriter might be in excess of customary 
commissions).  See "Plan of Distribution."

     The Company will not receive any of the proceeds from the sale of the 
Shares by the Selling Stockholders.  The Company has agreed to bear certain 
expenses in connection with the registration and sale of the Shares being 
offered by the Selling Stockholders.  The Company has agreed to indemnify the 
Selling Stockholders against certain liabilities, including liabilities under 
the Securities Act.  Estimated expenses payable by the Company in connection 
with this offering are $50,000.   See "Plan of Distribution."

     The Common Stock of the Company is traded on the Nasdaq National Market 
under the symbol "COCN." On July 7, 1998, the last sale price for the Common 
Stock as quoted on the Nasdaq National Market was $2.125 per share.

     The Selling Stockholders and any broker-dealers or agents that 
participate with the Selling Stockholders in the distribution of the Shares 
may be deemed to be "underwriters" within the meaning of Section 2(11) of the 
Securities Act, and any commissions received by them and any profit on the 
resale of the Shares purchased by them may be deemed to be underwriting 
commissions or discounts under the Securities Act.  

     THE COMMON STOCK OFFERED HEREBY INVOLVES A HIGH DEGREE OF RISK.
                SEE "RISK FACTORS" BEGINNING ON PAGE 4.

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND 
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES 
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE 
ACCURACY OR ADEQUACY OF THIS PROSPECTUS.  ANY REPRESENTATION TO THE CONTRARY 
IS A CRIMINAL OFFENSE.

JULY ___, 1998

<PAGE>

                                AVAILABLE INFORMATION

     The Company is subject to the informational requirements of the 
Securities Exchange Act of 1934, as amended (the "Exchange Act"), and in 
accordance therewith, files reports, proxy statements and other information 
with the Commission.  Such reports, proxy statements and other information 
filed by the Company with the Securities and Exchange Commission (the 
"Commission") can be inspected and copied at the public reference facilities 
maintained by the Commission at Judiciary Plaza, 450 Fifth Street, N.W., Room 
1024, Washington, D.C. 20549, and at the Commission's Regional Offices 
located at Seven World Trade Center, 13th Floor, New York, New York 10048 and 
Citicorp Center, 500 West Madison Street, Suite 1400, Chicago, Illinois 
60661.  Copies of such material can also be obtained from the Public 
Reference Section of the Commission at 450 Fifth Street, N.W., Washington, 
D.C. 20549, upon payment of prescribed rates. Furthermore, the Commission 
maintains a Web site that contains reports, proxy and information statements 
and other information regarding registrants that file electronically with the 
Commission.  Such Web site is located at http://www.sec.gov.  The Company's 
Common Stock is quoted on the Nasdaq National Market.  Reports, proxy 
statements and other information concerning the Company may be inspected at 
the National Association of Securities Dealers, Inc. at 1735 K Street, N.W., 
Washington, D.C. 20006.

                               ADDITIONAL INFORMATION

     A registration statement on Form S-3 with respect to the Shares offered 
hereby (together with all amendments, exhibits and schedules thereto, the 
"Registration Statement") has been filed with the Commission under the 
Securities Act.  This Prospectus does not contain all of the information 
contained in such Registration Statement, certain portions of which have been 
omitted pursuant to the rules and regulations of the Commission.  For further 
information with respect to the Company and the Shares offered hereby, 
reference is made to the Registration Statement.  Statements contained in 
this Prospectus regarding the contents of any contract or any other documents 
filed as an exhibit to the Registration Statement are not necessarily 
complete and, in each instance, reference is hereby made to the copy of such 
exhibit, and each such statement shall be deemed qualified in its entirety by 
such reference.  The Registration Statement may be inspected without charge 
at the Commission's public reference facilities described above, and copies 
of all or any part thereof may be obtained from such office, upon payment of 
the prescribed fees.

                  INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The following documents filed by the Company with the Commission are 
hereby incorporated herein by reference: 

     1.   The Company's Annual Report on Form 10-K for the year ended December
          31, 1997; 

     2.   The Company's Quarterly Report on Form 10-Q for the quarter ended
          March 31, 1998; 

     3.   The Company's Current Report on Form 8-K dated June 8, 1998;

     4.   The description of the Common Stock contained in the Company's
          Registration Statement on Form 8-A, filed December 10, 1992; and 

     5.   The description of the Preferred Share Purchase Rights contained in
          the Company's Registration Statement on Form 8-A filed May 16, 1995.

     All reports and other documents subsequently filed by the Company 
pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, after the 
date of this Prospectus and prior to the filing of a post-effective amendment 
which indicates that all securities offered hereby have been sold or which 
deregisters all securities remaining unsold, shall be deemed to be 
incorporated by reference herein and to be a part hereof from the date of 
filing of such reports and documents.  Any statement contained in a document 
incorporated by reference herein shall be deemed modified or superseded for 
purposes of this Prospectus to the extent that a statement contained or 
incorporated by reference herein modifies or supersedes such statement.  Any 
statement so modified or superseded shall not be deemed, except as so 
modified or superseded, to constitute a part of this Prospectus.

     The Company will provide without charge to each person to whom this 
Prospectus is delivered, upon written or oral request of such person, a copy 
of any and all of the information that has been or may be incorporated by 
reference in this Prospectus, other than exhibits to such documents (unless 
such exhibits are specifically incorporated by reference into such 
documents).  Such requests should be directed to CoCensys, Inc., 201 
Technology Drive, Irvine, California 92618, telephone (949) 753-6100, Attn:  
Corporate Communications and Investor Relations. 


                                      2.
<PAGE>

                           FORWARD LOOKING STATEMENTS

     THIS PROSPECTUS MAY CONTAIN FORWARD-LOOKING STATEMENTS THAT INVOLVE 
RISKS AND UNCERTAINTIES.  WHEN USED IN THIS PROSPECTUS, THE WORDS 
"ANTICIPATE," "BELIEVE," "ESTIMATE," AND "EXPECT" AND SIMILAR EXPRESSIONS AS 
THEY RELATE TO THE COMPANY OR ITS MANAGEMENT ARE INTENDED TO IDENTIFY SUCH 
FORWARD-LOOKING STATEMENTS.  THE COMPANY'S ACTUAL RESULTS, PERFORMANCE, OR 
ACHIEVEMENTS COULD DIFFER MATERIALLY FROM THE RESULTS EXPRESSED IN, OR 
IMPLIED BY, THESE FORWARD-LOOKING STATEMENTS. FACTORS THAT COULD CAUSE OR 
CONTRIBUTE TO SUCH DIFFERENCES INCLUDE RISKS RELATED TO THE UNCERTAINTY OF 
THE PRODUCT DEVELOPMENT AND CLINICAL TRIALS, THE UNCERTAINTY OF OBTAINING 
ADDITIONAL FUNDING, AND THE RISKS RELATED TO THE COMPANY'S DEPENDENCE ON 
COLLABORATIONS, AS WELL AS THOSE DISCUSSED BELOW UNDER THE CAPTION "RISK 
FACTORS" AND IN THE DOCUMENTS INCORPORATED HEREIN BY REFERENCE.

                                    THE COMPANY

     CoCensys is a biopharmaceutical company dedicated to the discovery and 
development of small molecule drugs to treat neurological and psychiatric 
disorders. The Company's product discovery and development programs are 
focused on the exploration of novel receptors and their ligands and 
inhibitors through three technology platforms: specific GABA(A) receptor 
modulators named Epalons; glutamate receptor antagonists; and sodium channel 
blockers.

     The Company was incorporated in California in February 1989 and 
reincorporated in Delaware in December 1992. The Company's executive offices 
are located at 201 Technology Drive, Irvine, California 92618, and its 
telephone number is (949) 753-6100.

RECENT DEVELOPMENTS

     On June 8, 1998 (the "Closing Date"), the Company sold 8,000 shares of 
Preferred Stock and five-year Warrants to purchase 350,000 shares of Common 
Stock for an aggregate purchase price of $8 million in a private placement to 
accredited investors pursuant to Regulation D of the Securities Act (the 
"Private Placement").  The Warrants are exercisable at $4.50 per share.
     
     Each share of Preferred Stock is convertible into the number of shares 
of the Common Stock equal to (a) the stated value ($1,000) plus any accrued 
and unpaid dividends on the date of conversion divided by (b) the "Conversion 
Price," which equals the lesser of (i) the average of the three lowest 
trading prices during the 15 trading days ending one trading day prior to the 
conversion, multiplied by 100% (until October 8, 1998) or 90% (after October 
8, 1998), or (ii) $3.93.  The Preferred Stock carries a 7.5% per annum 
dividend until converted, subject to reduction in the dividend rate to (i) 
5.5%, if the Common Stock trades at or above $4.05 per share for 10 
consecutive trading days, (ii) 3.5%, if the Common Stock trades at or above 
$4.95 per share for 10 consecutive trading days and (iii) 1.5%, if the Common 
Stock trades at or above $6.00 per share for 10 consecutive trading days, in 
each case so long as the price threshold is met.  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 Preferred Stock.  The holders of 
the Preferred Stock are subject to limits on the number of shares they can 
convert at any one time, which limits may be waived by such holders.  Subject 
to such restrictions, the Preferred Stock may be converted into Common Stock 
at any time at the election of the holder, and automatically converts on June 
8, 2001 if not converted earlier. 
     
     During the period beginning 90 days after the effective date of the 
Registration Statement and ending 360 days thereafter, the Company is 
obligated to sell, and the Selling Stockholders are obligated to purchase, an 
additional $2 million of Preferred Stock subject to, among other things, the 
closing price for the Common Stock being greater than $3.75 per share for 10 
consecutive trading days.  On November 8, 1998, each purchaser of Initial 
Shares shall receive its pro rata portion of the Additional Warrants so long 
as 65% of the Initial Shares purchased by such purchaser is outstanding on 
such date.
      
     Rose Glen Capital Management, L.P. served as investment manager to the 
lead investor in the transaction.  The Company agreed to reimburse Rose Glen 
Capital Management, L.P. for all expenses incurred by the Selling 
Stockholders in the Private Placement, up to a maximum of $30,000.


                                      3.
<PAGE>

                                    RISK FACTORS

     AN INVESTMENT IN THE SHARES BEING OFFERED HEREBY INVOLVES A HIGH DEGREE 
OF RISK. PROSPECTIVE INVESTORS SHOULD CAREFULLY CONSIDER THE FOLLOWING RISK 
FACTORS, IN ADDITION TO OTHER INFORMATION CONTAINED OR INCORPORATED BY 
REFERENCE IN THIS PROSPECTUS, IN EVALUATING AN INVESTMENT IN THE SHARES OF 
COMMON STOCK OFFERED HEREBY.

     EARLY STAGE OF DEVELOPMENT; TECHNOLOGICAL UNCERTAINTY.  CoCensys is at 
an early stage of development.  All of its products are in research and 
development, and no revenues have been generated from sales of its products. 
The physiology of brain disorders is highly complex, and the causes of these 
disorders are not fully known. All of the compounds currently under 
development by the Company will require significant additional research and 
development, including pre-clinical testing and extensive clinical testing, 
prior to submission of any regulatory application for commercial use. 
Although preclinical data indicate that such compounds may play an important 
role in the modulation of neural activity in the brain, preclinical studies 
are not necessarily indicative of results that will be obtained in human 
clinical trials.  There can be no assurance that the Company's research or 
product development efforts will be successfully completed, that the 
compounds currently under development will be safe and efficacious, that 
required regulatory approvals can be obtained, that products can be 
manufactured at acceptable cost and with appropriate quality or that any 
approved products can be successfully marketed or will be accepted by 
patients, health care providers and third-party payors. 

     UNCERTAINTY OF PRODUCT DEVELOPMENT AND CLINICAL TRIALS.  Before 
obtaining regulatory approvals for the commercial sale of any of its products 
under development, the Company must demonstrate, through pre-clinical studies 
and clinical trials, that the product is safe and efficacious for use in each 
target indication.  None of the Company's products has completed testing for 
efficacy in humans, and there can be no assurance that results of animal 
testing will be replicated in human clinical trials.  Only three of the 
Company's product candidates are currently undergoing clinical testing.  The 
Company plans to file investigational new drug applications ("INDs") with the 
United States Food and Drug Administration (the "FDA") to test additional 
compounds.  There can be no assurance that the Company will be permitted to 
undertake human clinical testing of any future products, or, if permitted, 
that any products will prove to be safe and efficacious.  There can be no 
assurance that the Company's clinical trials will be completed, that they 
will demonstrate the safety and efficacy of any products or that they will 
result in marketable products.  There can be no assurance that the Company 
will not encounter problems with clinical trials that will cause the Company 
to delay or suspend clinical trials.  The Company's lead compounds, and all 
of the Company's products in research or development, may prove to have 
undesirable and unintended side effects or other characteristics that may 
prevent or limit their commercial use.  In 1997, the Company reported that 
preliminary results from safety trials of its compound under development for 
stroke, ACEA 1021 or licostinel, showed crystals of the compound in the urine 
of some subjects, a potentially dose-limiting side effect.  Although the 
crystal formation occurred only in subjects with four times the blood plasma 
level of the compound that was therapeutically effective in animals, the 
Company's development partner, Novartis Pharma A.G., ceased its participation 
in the development of ACEA 1021.  There can be no assurance that the Company 
will find another collaborative partner to continue the development of the 
compound. In addition, there can be no assurance that any of the Company's 
products will ultimately obtain FDA or foreign marketing approval for any 
indication or that an approved compound will be capable of being produced in 
commercial quantities at a reasonable cost and successfully marketed. 
Products, if any, resulting from the Company's research and development 
programs are not expected to be commercially available for several years. 

     FUTURE CAPITAL NEEDS; UNCERTAINTY OF ADDITIONAL FUNDING.  The Company's 
operations to date have consumed substantial amounts of cash.  The negative 
cash flow from operations is expected to continue and to accelerate in the 
foreseeable future. The development of the Company's products will continue 
to require a commitment of substantial funds to conduct the research, 
pre-clinical and clinical testing necessary to bring such products to market 
and to establish manufacturing and expand marketing capabilities. 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 pre-clinical 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 sales and marketing capabilities, the establishment of 
third-party manufacturing arrangements and the establishment of additional 
collaborative relationships. Currently, the Company anticipates that its 
existing capital resources,

                                       4.

<PAGE>

including funding expected to be available through current partner 
collaborations, will be adequate to satisfy its capital needs for at least 
the next 12 months. The Company will need to raise substantial additional 
capital to fund its operations, continue development of its products and 
bring products to market. Even if the Company's product development efforts 
are successful, products would not be expected to be approved for commercial 
sale for at least several years.  The Company intends to seek required 
additional funding through collaborative arrangements and through public or 
private equity or debt financings.  There can be no assurance that additional 
financing will be available on acceptable terms or at all.  If additional 
funds are raised by issuing equity securities, dilution to stockholders will 
result.  To obtain funds through arrangements with collaborative partners or 
others may require the Company to relinquish rights to certain of its 
technologies, product candidates or products that the Company would otherwise 
seek to develop or commercialize itself.  If adequate funds are not 
available, the Company's operations may be adversely affected and it may be 
required to delay, reduce the scope of or eliminate one or more of its 
research or development programs.

     DEPENDENCE ON COLLABORATIVE ARRANGEMENTS.   The Company's strategy for 
the development, clinical testing, manufacturing and commercialization of its 
products includes entering into various collaborations with corporate 
partners, licensors, licensees and others.  The Company is party to 
collaboration agreements with three corporate partners (each, a 
"Collaboration Agreement"). The Company has entered into Collaboration 
Agreements with Warner-Lambert Company ("Warner-Lambert") for research and 
development of subtype-selective NMDA receptor antagonists, with G.D. Searle 
& Co. ("Searle") for the development of CCD 3693 for insomnia and 
Wyeth-Ayerst Laboratories, a division of American Home Products 
("Wyeth-Ayerst") for the development of Co 2-6749 for anxiety. There can be 
no assurance that CoCensys will have the substantial resources needed to 
fulfill its research, development and commercialization obligations under the 
Collaboration Agreements.  If CoCensys is unable to fulfill such obligations, 
it may be required to terminate early under the agreements and forfeit 
substantial rights thereunder. 

     The Collaboration Agreement with Searle provides that if Searle 
terminates voluntarily, it will lose all development and marketing rights to 
CCD 3693. However, if Searle were to terminate after the filing of an IND for 
CCD 3693, the Company will be required to reimburse Searle for any 
development costs borne by Searle out of proceeds from any sales of CCD 3693. 
If CoCensys were to terminate, Searle would be granted exclusive worldwide 
rights in CCD 3693, subject to a specified royalty payment to CoCensys. 

     The Collaboration Agreement with Warner-Lambert allows either party to 
terminate voluntarily its participation in the collaboration.  If either 
party terminates 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 which case the 
terminating party would forfeit all rights and obligations to co-develop and 
co-promote such product, subject to a specified royalty payment to the 
terminating party. 

     The Collaboration Agreement with Wyeth-Ayerst provides that 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 to 
Wyeth-Ayerst a portion of the funds paid by Wyeth-Ayerst to CoCensys to fund 
the back-up program. 

     There can be no assurance that the Company will be able to negotiate 
further collaborative arrangements on acceptable terms, if at all, or that 
current or future collaborative arrangements will be successful. To the 
extent that the Company is not able to establish such arrangements, it would 
experience increased capital requirements to undertake such activities at its 
own expense. In addition, the Company may encounter significant delays in 
introducing its products into certain markets or find that the development, 
manufacture or sale of its products in such markets is adversely affected by 
the absence of such collaborative agreements. To the extent the Company 
enters into co-promotion or other licensing arrangements, revenues received 
by the Company will depend upon the efforts of third parties, and there can 
be no assurance that such parties will devote such efforts or that such 
efforts will be successful.

     HISTORY OF OPERATING LOSSES; ACCUMULATED DEFICIT.  The Company has 
experienced significant operating losses since its inception.  As of March 
31, 1998, the Company had an accumulated deficit of $102.3 million. The

                                       5.

<PAGE>

Company will incur significant additional operating losses over the next 
several years. In addition, if the Company is successful in moving compounds 
into large-scale Phase II and Phase III clinical trials, it will incur 
substantial increases in research and development expenses, which in turn may 
cause cumulative losses to increase substantially. 

     GOVERNMENT REGULATION; NO ASSURANCE OF PRODUCT APPROVALS.  The 
production and marketing of the Company's potential products and its ongoing 
research and development activities are subject to extensive regulation by 
governmental authorities in the United States and other countries.  Prior to 
marketing in the United States, any drug developed by the Company must 
undergo rigorous pre-clinical (animal) and clinical (human) testing and an 
extensive regulatory approval process implemented by the FDA under the United 
States Food, Drug and Cosmetic Act.  Satisfaction of such regulatory 
requirements, which includes satisfying the FDA that the product is both safe 
and effective, typically takes several years or more depending upon the type, 
complexity and novelty of the product and requires the expenditure of 
substantial resources.  Clinical trials are rigorously regulated. Preclinical 
studies must be conducted in conformance with the FDA's Good Laboratory 
Practice ("GLP") regulations.  Clinical testing must meet requirements for 
Institutional Review Board ("IRB") oversight and informed consent, as well as 
FDA prior review, oversight and good clinical practice ("GCP") requirements.  
Clinical trials in the United States require large numbers of test subjects.  
There can be no assurance that those conducting clinical trials for the 
Company will be able to initiate trials at preferred clinical test sites, 
recruit sufficient test subjects or that clinical trials will be started or 
completed successfully in a timely fashion, if at all, with respect to any of 
the Company's products.  Furthermore, the Company or the FDA may suspend 
clinical trials at any time if it believes that the subjects participating in 
such trials are being exposed to unacceptable health risks. There can be no 
assurance that the Company will not encounter problems in clinical trials 
which will cause the Company or the FDA to delay or suspend clinical trials.  
In many European countries, data from early human studies in healthy subjects 
are first submitted to regulatory agencies at the time the application to 
test the drug in patients is filed, or later depending upon the country.  
There is no assurance that the regulatory agencies in any European country 
will accept the data from the trials currently being conducted by the 
Company, or that additional data will not be required.  There is no assurance 
that the data from these European trials will be accepted by the FDA.

     There can be no assurance that any compound developed by the Company 
alone or in conjunction with others will prove to be safe and efficacious in 
clinical trials or will meet all of the applicable regulatory requirements 
needed to receive marketing approval.  Data obtained from preclinical and 
clinical activities are susceptible to varying interpretations which could 
delay, limit or prevent regulatory approvals.  In addition, delays or 
rejections may be encountered based upon additional governmental regulation 
from future legislation or administrative action or changes in FDA policy 
during the period of product development and FDA regulatory review.  Similar 
delays may also be encountered in foreign countries.  There can be no 
assurance that even after such time and expenditures, regulatory approval 
will be obtained for any products developed by the Company.  If regulatory 
approval of a product is granted, such approval will be limited to those 
disease states and conditions for which the product is useful, as 
demonstrated through clinical studies. Furthermore, approval may entail 
ongoing requirements for postmarketing studies. Even if such regulatory 
approval is obtained, a marketed product, its manufacturer and its 
manufacturing facilities are subject to continual review and periodic 
inspections.  The regulatory standards for manufacturing are currently being 
applied stringently by the FDA.  Discovery of previously unknown problems 
with a product, manufacturer or facility may result in restrictions on such 
product or manufacturer, including withdrawal of the product from the market.

     The Company intends to establish additional collaborative relationships to
conduct clinical testing and seek regulatory approvals to market its products in
major markets outside the United States.  There can be no assurance that the
Company will be successful in establishing such relationships or that such
approvals will be received on a timely basis, if at all.  To market its products
abroad, the Company also must satisfy foreign regulatory requirements,
implemented by foreign health authorities, governing human clinical trials and
marketing approval.  The foreign regulatory approval process includes all of the
risks associated with FDA approval set forth above.

     UNCERTAINTY OF PROTECTION OF PATENTS AND PROPRIETARY RIGHTS.  The 
Company's success will depend, in part, on its ability to obtain patents, 
maintain trade secrets and operate without infringing on the propriety rights 
of others, both in the United States and other countries. The patent 
positions of biotechnology and pharmaceutical companies can be highly 
uncertain and involve complex legal and factual questions, and therefore the 
breadth of claims allowed in biotechnology and pharmaceutical patents cannot 
be predicted.

                                       6.

<PAGE>

     The Company files and prosecutes patent applications both on its own 
behalf and in connection with technology licensed from others.  CoCensys has 
19 issued patents with expiration dates ranging from June 9, 2009 to 
September 29, 2015; in addition, another 23 filed patents are pending.  
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 GABA(A) receptor modulators, 
including neuroactive steroids (Epalons), to treat migraine.  In June 1997, 
the Company 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 the 
Company is developing to treat chronic pain and epilepsy.  CoCensys has made 
related patent filings in selected foreign countries, and intends to file 
additional domestic and foreign applications as appropriate.  The Company's 
issued and allowed patents relate to certain aspects of the Company's Epalon 
and glutamate receptor antagonist compounds.  The Company's patent 
applications include claims for processes, methods and therapeutic uses, as 
well as composition of matter claims for compounds which the Company believes 
are not naturally occurring or previously known.  There can be no assurance 
that the Company will develop additional products or processes that are 
patentable, that patents will issue from any more of these applications, that 
patents issued to or licensed by the Company will not be challenged, 
invalidated or circumvented, or that the rights granted thereunder will 
provide adequate proprietary protection or competitive advantages to the 
Company.

     Competitors may have filed patent applications, may have been issued 
patents or may obtain additional patents and proprietary rights relating to 
products or processes competitive with those of the Company.  There is a 
substantial backlog of biotechnology and pharmaceutical patents at the PTO. 
Accordingly, the time at which the Company's or competitors' patent 
applications will issue as patents cannot be predicted.  Since patent 
applications in the United States are maintained in secrecy until patents 
issue, and since publication of discoveries in the scientific or patent 
literature often lags behind actual discoveries, the Company cannot be 
certain that it was the first to discover subject matter covered by its 
patent applications or patents or that it was the first to file patent 
applications for such inventions.  Moreover, the Company may have to 
participate in interference proceedings declared by the United States Patent 
and Trademark Office ("PTO") or litigation to determine priority of 
invention, which could result in substantial cost to the Company, even if the 
eventual outcome is favorable to the Company.  The Company is aware of a 
patent that has issued that contains claims which may, if valid, block the 
Company from selling certain compounds for one particular indication not 
currently being pursued by the Company.  In the event the Company proceeds 
with an interference, there can be no assurance that the Company will be 
successful. In addition, there can be no assurance that the Company's 
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 the Company to significant liabilities to third parties, require 
disputed rights to be licensed from third parties or require the Company to 
cease using such technology.

     The commercial success of the Company will also depend, in part, on its 
not infringing patents issued to others and not breaching the technology 
licenses upon which any Company products are based.  It is uncertain whether 
any third-party patents will require the Company to alter its products or 
processes, obtain licenses or cease certain activities.  A number of 
pharmaceutical companies, biotechnology companies, universities and research 
institutions have filed patent applications or received patents that may be 
competitive with the Company's applications, or conflict in certain respects 
with claims made under the Company's applications.  Such a conflict could 
result in a significant reduction of the coverage of the Company's patents, 
if issued.  In addition, if patents are issued to others which contain 
competitive or conflicting claims and such claims are ultimately determined 
to be valid, the Company may be required to obtain licenses to these patents 
or to develop or obtain alternative technology.  If any licenses are 
required, there can be no assurance that the Company will be able to obtain 
any such licenses on commercially favorable terms, if at all.  The Company's 
breach of an existing license or failure to obtain a license to any 
technology that it may require to commercialize its products may have a 
material adverse impact on the Company.  Litigation, which could result in 
substantial costs to the Company, may also be necessary to enforce any 
patents issued to the Company or to determine the scope and validity of 
third-party proprietary rights.  If competitors of the Company prepare and 
file patent applications in the United States that claim technology also 
claimed by the Company, the Company may have to participate in interference 
proceedings declared by the PTO or litigation to determine priority of 
invention, which could result in substantial cost to the Company, even if the 
eventual outcome is favorable to the Company.  There can be no assurance that 
the Company's patents, if issued, would be held valid and infringed by a 
court of competent jurisdiction.  An adverse outcome with regard to a third

                                       7.

<PAGE>

party claim could subject the Company to significant liabilities to third 
parties, require disputed rights to be licensed from third parties or require 
the Company to cease using such technology.

     The Company also relies in part on trade secrets to protect its 
technology, and relies on confidentiality agreements with its employees, 
consultants and certain contractors.  There can be no assurance that these 
agreements will not be breached, that the Company would have adequate 
remedies for any breach, or that the Company's trade secrets will not 
otherwise become known or be independently discovered by competitors.

     COMPETITION; RAPID TECHNOLOGICAL CHANGE.  CoCensys is engaged in 
business in a rapidly changing field.  Existing products and therapies, as 
well as those under development by other companies, will compete directly 
with products that the Company is seeking to develop and market.  Competition 
from fully integrated pharmaceutical companies, including the Company's 
collaborative partners, and more established biotechnology companies is 
intense and is expected to increase. Most of these companies have 
significantly greater financial resources and expertise than the Company in 
research and development, manufacturing, pre-clinical and clinical testing, 
obtaining regulatory approvals, marketing and distribution. Smaller companies 
may also prove to be significant competitors, particularly through 
collaborative arrangements with large pharmaceutical companies. Many of these 
competitors 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. In addition, 
these companies and institutions compete with the Company in recruiting and 
retaining highly qualified scientific and management personnel. Further, 
CoCensys faces 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. There can be 
no assurance that the Company's competitors will not develop more effective 
or more affordable products, or achieve earlier patent protection or product 
commercialization than the Company. 

     NEED TO ATTRACT AND RETAIN KEY EMPLOYEES AND CONSULTANTS.  The Company 
is highly dependent on the principal members of its scientific and management 
staff, the loss of whose services might significantly delay the achievement 
of development objectives.  In addition, the Company relies on consultants 
and advisors to assist the Company in formulating its research and 
development strategy.  Attracting and retaining qualified personnel, 
consultants and advisors is critical to the Company's success.  In order to 
pursue its product development and marketing plans, the Company will be 
required to hire additional qualified scientific personnel to perform 
research and development, as well as personnel with expertise in clinical 
testing, government regulation, manufacturing and marketing.  Growth in 
product development and marketing is also expected to require the addition of 
management personnel and the development of additional expertise by existing 
management personnel.  The Company faces competition in hiring qualified 
individuals from numerous pharmaceutical and biotechnology companies, 
universities and other research institutions.  There can be no assurance that 
the Company will be able to attract and retain such individuals on acceptable 
terms or at all. 

     LACK OF MANUFACTURING EXPERIENCE; RELIANCE ON CONTRACT MANUFACTURERS.  
The Company has no manufacturing facilities for clinical or commercial 
production of any compounds currently under development and relies on 
contract manufacturers to produce its compounds for pre-clinical and clinical 
purposes and intends to rely on contract manufacturers for commercial 
production. The pharmaceutical products under development by the Company have 
never been manufactured on a commercial scale, and there can be no assurance 
that such products can be manufactured in commercial quantities at an 
acceptable cost. The Company intends to establish arrangements with contract 
manufacturers to supply compounds for subsequent clinical trials as well the 
manufacture, packaging, labeling and distribution of its products. If the 
Company is unable to contract for sufficient supply of its compounds on 
acceptable terms, the Company's pre-clinical and human clinical testing 
schedule would be delayed, resulting in the delay of submission of products 
for regulatory approval and initiation of new development programs, which 
would have a material adverse effect on the Company. If the Company should 
encounter delays or difficulties in establishing relationships with 
manufacturers to produce, package and distribute its products, market 
introduction and subsequent sales of such products would be adversely 
affected. Moreover, contract manufacturers that the Company may use must 
adhere to current good manufacturing practice regulations enforced by the FDA 
through its facilities inspection program. If these facilities cannot pass a 
pre-approval plant inspection, FDA pre-market approval of the products will 
be adversely affected. 

                                       8.
<PAGE>

     LACK OF SALES AND MARKETING EXPERIENCE.  The Company sold its 
Pharmaceutical Sales and Marketing Division to Watson Pharmaceuticals in 
1997. Accordingly, if the Company is to market its own products in the future 
(subject to successful development and receipt of regulatory approvals for 
such products), the Company must develop or acquire, and thereafter maintain 
and expand, a new sales and marketing organization with technical expertise 
and with supporting distribution capability.  There can be no assurance that 
the Company will be successful developing or acquiring and, thereafter, 
maintaining and expanding such a capability or in gaining market acceptance 
for any products. Failure to do so would have a material adverse effect on 
the Company's business.

     UNCERTAINTY OF THIRD-PARTY REIMBURSEMENT.  In both domestic and foreign 
markets, sales of the Company's 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.  Significant uncertainty 
exists as to the reimbursement status of newly approved health care products. 
There can be no assurance that the Company's products will be considered cost 
effective or that adequate third-party reimbursement will be available to 
enable CoCensys to maintain price levels sufficient to realize an appropriate 
return on its investment in product development.  In certain foreign markets, 
the Company's products may be subject to governmentally mandated prices.  If 
adequate reimbursement is not provided by governments and third-party payors 
for the Company's potential products or if adverse pricing is mandated by 
foreign governments, the Company's business, financial condition and results 
of operations would be materially adversely affected. Legislation and 
regulations affecting the formula for pricing pharmaceuticals may change 
before the Company's products are approved for marketing. 

     RISK OF PRODUCT LIABILITY; AVAILABILITY OF INSURANCE.  The Company's 
business will expose it to potential product liability risks that are 
inherent in the testing, manufacturing and marketing of therapeutic products 
for humans. Although the Company currently has liability insurance covering 
its clinical trials, there can be no assurance that such coverage would be 
sufficient to cover all potential claims or that the Company will be able to 
obtain and maintain such insurance for all of its clinical trials and future 
products. The Company will need to increase such coverage in the event it 
commercializes any products under development.  There can be no assurance 
that the Company will be able to obtain or maintain product liability 
insurance in the future on acceptable terms or with adequate coverage against 
potential liabilities. 

     HAZARDOUS MATERIALS.  The Company's research and development involves 
the controlled use of hazardous materials, chemicals and various radioactive 
compounds. Although the Company believes that its 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. In the event of 
such an accident, the Company could be held liable for any damages that 
result and any such liability could exceed the resources of the Company. The 
Company may incur substantial costs to comply with environmental regulations 
if the Company develops manufacturing capacity. 

     UNCERTAINTY OF ORPHAN DRUG DESIGNATION.  Under the Orphan Drug Act, the 
FDA may designate a product as an orphan drug.  An orphan drug is a drug 
intended to treat a "rare disease or condition," which is a disease or 
condition that affects populations of less than 200,000 individuals in the 
United States or, if victims of a disease number more than 200,000, the 
sponsor establishes that it does not realistically anticipate its product 
sales will be sufficient to recover its costs. The Company's compound, CCD 
1042 or ganaxolone, has received orphan drug designation for its use in 
treating infantile spasm. 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, including limited tax credits and 
high-priority FDA review of a New Drug Application ("NDA"). 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. There may be multiple designations of an orphan 
drug for different rare diseases. However, only the sponsor of the first 
approved NDA for a given drug for its use in treating a given rare disease 
may receive marketing exclusivity. There can be no assurance that the precise 
scope of protection that is currently afforded by orphan drug designation 
will be available in the future or that the current level of exclusivity and 
tax credits will remain in effect. 

                                        9.
<PAGE>

     PRICE VOLATILITY; DILUTION.  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 the Company, have in the past been, 
and can in the future be expected to be, especially volatile. Announcements 
of technological innovations or new products by the Company or its 
competitors, developments or disputes concerning patents or proprietary 
rights, publicity regarding actual or potential medical results relating to 
products under development by the Company or its competitors, 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 the Company's financial 
results, may have a significant impact on the market price of the Company's 
Common Stock. 

     The sale of a large number of shares of the Company's Common Stock in 
the public market, including the Shares offered hereby, could have an adverse 
effect on the market price of its Common Stock.  Substantially all of the 
outstanding shares of the Company's Common Stock are available for immediate 
sale in the public markets, subject to volume restrictions applicable to 
affiliates. Approximately 4,204,183 additional shares subject to currently 
exercisable options and warrants also may be sold freely immediately 
following exercise thereof.  As of July 2, 1998, 8,000 shares of the 
Preferred Stock were issued and outstanding.  Each share of the Preferred 
Stock is convertible into such number of shares of Common Stock as is 
determined by dividing the stated value ($1,000) of the share of Preferred 
Stock (as such value is increased by dividends based on the number of days 
the Preferred Stock is held) by the then current Conversion Price (which is 
determined by reference to the then current market price).  If converted on 
July 2, 1998, the Preferred Stock would have been convertible into 
approximately 3,200,000 shares of Common Stock, but this number of shares 
could prove to be significantly greater in the event of a decrease in the 
market price of the Common Stock.  Purchasers of Common Stock could therefore 
experience substantial dilution of their investment upon conversion of the 
Preferred Stock.

ABSENCE OF DIVIDENDS

     The Company has never paid any cash dividends and does not anticipate 
paying cash dividends in the foreseeable future.
                                          
                                  USE OF PROCEEDS

     The Company will not receive any of the proceeds from the sales of 
Shares by the Selling Stockholders.

                                SELLING STOCKHOLDERS

     The following table sets forth the names of the Selling Stockholders, 
the number of shares of Common Stock owned beneficially by each of them as of 
June 30, 1998, the number of shares which may be offered pursuant to this 
Prospectus and the number of shares to be owned by each Selling Stockholder 
after this offering.  This information is based upon information provided by 
the Selling Stockholders.  Because the Selling Stockholders may offer all, 
some or none of their Common Stock, no definitive estimate as to the number 
of shares thereof that will be held by the Selling Stockholders after such 
offering can be provided.  
     
     The number of shares set forth  in the table represents an estimate of 
the number of shares of Common Stock to be offered by the Selling 
Stockholders.  The actual number of shares of Common Stock issuable upon 
conversion of Preferred Stock and exercise of the Warrants is indeterminate, 
is subject to adjustment and could be materially less or more than such 
estimated number depending on factors which cannot be predicted by the 
Company at this time, including, among other factors, the future market price 
of the Common Stock.  The actual number of shares of Common Stock offered 
hereby, and included in the Registration Statement of which this Prospectus 
is a part, includes such additional number of shares of Common Stock as may 
be issued or issuable upon conversion of the Preferred Stock and exercise of 
the Warrants by reason of the floating rate conversion price mechanism or 
other adjustment mechanisms described therein, or by reason of any stock 
split, stock dividend or similar transaction involving the Common Stock, in 
order to prevent dilution, in accordance with Rule 416 under the Securities 
Act.

                                        10.
<PAGE>

<TABLE>
<CAPTION>
                                                                                                             Ownership After
                                                                                                              Offering(1)(3)
                                                                                      Number of       ---------------------------
                                                           Shares Beneficially         Shares            Number 
                                                             Owned Prior to             Being              of
 Name of Selling Stockholders                                 Offering (1)           Offered (2)         Shares          Percent
 ----------------------------                                 ------------           -----------         ------          -------
<S>                                                       <C>                      <C>                   <C>             <C>
 RGC International Investors, LDC(4)   . . . . . . .            3,987,500             3,987,500             0               *
 Themis Partners L.P.(5)   . . . . . . . . . . . . .              957,000               957,000             0               *
 Heracles Fund(6)  . . . . . . . . . . . . . . . . .            1,435,500             1,435,500             0               *

</TABLE>
______________
*  Less than one percent

(1)  Percentage of beneficial ownership is calculated assuming 24,664,738 shares
     of Common Stock outstanding as of June 30, 1998.  Pursuant to the terms of
     the Preferred Stock, the Preferred Stock is convertible by any holder only
     to the extent that the number of shares of Common Stock thereby issuable,
     together with the number of shares of Common Stock owned by such holder and
     its affiliates (but not including shares of Common Stock underlying
     unconverted Preferred Stock) would not exceed 4.9% of the then outstanding
     Common Stock as determined in accordance with Section 13(a) of the Exchange
     Act.  Accordingly, the number of shares of Common Stock set forth in the
     table for these Selling Stockholders exceeds the number of shares of Common
     Stock that these Selling Stockholders could own beneficially at any given
     time through their ownership of the Preferred Stock.  In that regard,
     beneficial ownership of these Selling Stockholders set forth in the table
     is not determined in accordance with Rule 13d-3 under the Exchange Act. 
     This limitation may be waived by the holder upon 61 days notice to the
     Company.  Except as indicated in the footnotes to this table and pursuant
     to applicable community property laws, the persons named in the table have
     sole voting and investment power with respect to all shares of Common Stock
     beneficially owned.

(2)  Includes shares issuable upon conversion of Preferred Stock and exercise of
     Warrants.  Assumes arbitrarily that the Preferred Stock is converted at a
     conversion price of $1.67 per share (including shares issuable upon
     conversion of accrued interest at June 30, 1998) and no limits or
     adjustments are applicable.  If the Preferred Stock had been actually
     converted on July 2, 1998, the conversion price would have been $2.50 in
     accordance with the terms thereof, at which price the aggregate number of
     shares of Common Stock owned by the Selling Stockholders would have been
     approximately 3,200,000.

(3)  Assumes the sale of all Shares offered hereby.

(4)  Includes up to 3,768,750 shares of Common Stock issuable upon the
     conversion of 6,250 shares of Preferred Stock and up to 218,750 shares of
     Common Stock issuable upon the exercise of Warrants held of record by RGC
     International Investors, LDC.

(5)  Includes up to 904,500 shares of Common Stock issuable upon the conversion
     of 1,500 shares of Preferred Stock and up to 52,500 shares of Common Stock
     issuable upon the exercise of Warrants held of record by Themis Partners
     L.P.

(6)  Includes up to 1,356,750 shares of Common Stock issuable upon the
     conversion of 2,250 shares of Preferred Stock and up to 78,750 shares of
     Common Stock issuable upon the exercise of Warrants held of record by
     Heracles Fund.
                                          
                                PLAN OF DISTRIBUTION

     The Company will receive no proceeds from this offering.  The Shares 
offered hereby may be sold by the Selling Stockholders or by pledgees, 
donees, transferees or other successors in interest that receive such shares 
as a gift, partnership distribution or other non-sale related transfer.  The 
Shares may be sold from time to time in transactions in the over-the-counter 
market, in negotiated transactions, or a combination of such methods of sale, 
at fixed prices which may be changed, at market prices prevailing at the time 
of sale, at prices related to prevailing

                                        11.
<PAGE>

market prices or at negotiated prices.  The Selling Stockholders may effect 
such transactions by selling the Shares to or through broker-dealers, 
including block trades in which brokers or dealers will attempt to sell the 
Shares as agent but may position and resell the block as principal to 
facilitate the transaction, or in one or more underwritten offerings on a 
firm commitment or best effort basis.  Sales of Selling Stockholders' Shares 
may also be made pursuant to Rule 144 under the Securities Act, where 
applicable.

     To the extent required under the Securities Act, the aggregate amount of 
Selling Stockholders' Shares being offered and the terms of the offering, the 
names of any such agents, brokers, dealers or underwriters and any applicable 
commission with respect to a particular offer will be set forth in an 
accompanying Prospectus supplement. Any underwriters, dealers, brokers or 
agents participating in the distribution of the Shares may receive 
compensation in the form of underwriting discounts, concessions, commissions 
or fees from a Selling Stockholder and/or purchasers of Selling Stockholders' 
Shares, for whom they may act (which compensation as to a particular 
broker-dealer might be in excess of customary commissions).

     From time to time, one or more of the Selling Stockholders may pledge, 
hypothecate or grant a security interest in some or all of the Shares owned 
by them, and the pledgees, secured parties or persons to whom such securities 
have been hypothecated shall, upon foreclosure in the event of default, be 
deemed to be Selling Stockholders hereunder.  In addition, a Selling 
Stockholder may, from time to time, sell short the Common Stock of the 
Company, and in such instances, this Prospectus may be delivered in 
connection with such short sales and the Shares offered hereby may be used to 
cover such short sales.

     From time to time one or more of the Selling Stockholders may transfer, 
pledge, donate or assign such Selling Stockholders' Shares to lenders or 
others and each of such persons will be deemed to be a "Selling Stockholder" 
for purposes of this Prospectus.  The number of Selling Stockholders' Shares 
beneficially owned by those Selling Stockholders who so transfer, pledge, 
donate or assign Selling Stockholders' Shares will decrease as and when they 
take such actions.  The plan of distribution for Selling Stockholders' Shares 
sold hereunder will otherwise remain unchanged, except that the transferees, 
pledgees, donees or other successors will be Selling Stockholders hereunder.

     A Selling Stockholder may enter into hedging transactions with 
broker-dealers and the broker-dealers may engage in short sales of the Common 
Stock in the course of hedging the positions they assume with such Selling 
Stockholder, including, without limitation, in connection with distributions 
of the Common Stock by such broker-dealers.  A Selling Stockholder may also 
enter into option or other transactions with broker-dealers that involve the 
delivery of the Common Stock to the broker-dealers, who may then resell or 
otherwise transfer such Common Stock.  A Selling Stockholder may also loan or 
pledge the Common Stock to a broker-dealer and the broker-dealer may sell the 
Common Stock so loaned or upon a default may sell or otherwise transfer the 
pledged Common Stock.

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

     The Selling Stockholders and any broker-dealers or agents that 
participate with the Selling Stockholders in the distribution of the Shares 
may be deemed to be "underwriters" within the meaning of the Securities Act, 
and any commissions received by them and any profit on the resale of the 
Shares purchased by them may be deemed to be underwriting commissions or 
discounts under the Securities Act.

     The Selling Stockholders and any other persons participating in the sale 
or distribution of the Shares will be subject to applicable provisions of the 
Exchange Act and the rules and regulations thereunder, which provisions may 
limit the timing of purchases and sales of any of the Shares by the Selling 
Stockholders or any other such person.  The foregoing may affect the 
marketability of the Shares.

     The Shares were originally issued to the Selling Stockholders pursuant 
to an exemption from the registration requirements of the Securities Act 
provided by Section 4(2) thereof.  The Company agreed to register the Shares 
under the Securities Act and to indemnify and hold the Selling Stockholders 
harmless against certain liabilities under the Securities Act that could 
arise in connection with the sale by the Selling Stockholders of the Shares.  
The Company has agreed to pay all reasonable fees and expenses incident to 
the filing of this Registration Statement.

                                        12.
<PAGE>

                                   LEGAL MATTERS

     The legality of the securities offered hereby will be passed upon for 
the Company by Cooley Godward LLP, Palo Alto, California.

                                      EXPERTS

     The financial statements of the Company appearing in the Company's 
Annual Report on Form 10-K for the year ended December 31, 1997, have been 
audited by Ernst & Young LLP, independent auditors, as set forth in their 
report thereon included therein and incorporated herein by reference.  Such 
financial statements are incorporated herein by reference in reliance upon 
such report given upon the authority of such firm as experts in accounting 
and auditing.


                                        13.
<PAGE>
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------

     NO DEALER, SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS
PROSPECTUS AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT
BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY.  THIS PROSPECTUS DOES
NOT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY TO ANY
PERSON IN ANY JURISDICTION IN WHICH SUCH OFFER OR SOLICITATION WOULD BE UNLAWFUL
OR TO ANY PERSON TO WHOM IT IS UNLAWFUL.  NEITHER THE DELIVERY OF THIS
PROSPECTUS NOR ANY OFFER OR SALE MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES,
CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE AFFAIRS OF THE
COMPANY OR THAT THE INFORMATION CONTAINED HEREIN IS CORRECT AS OF ANY TIME
SUBSEQUENT TO THE DATE HEREOF.


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



                                 TABLE OF CONTENTS
                                                                       PAGE
                                                                       ----
Available Information  . . . . . . . . . . . . . . . . . . . . . .       2
Additional Information . . . . . . . . . . . . . . . . . . . . . .       2
Incorporation of Certain Documents by 
  Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . .       2
Forward Looking Statements . . . . . . . . . . . . . . . . . . . .       3
The Company  . . . . . . . . . . . . . . . . . . . . . . . . . . .       3
Risk Factors . . . . . . . . . . . . . . . . . . . . . . . . . . .       4
Use of Proceeds  . . . . . . . . . . . . . . . . . . . . . . . . .      10
Selling Stockholders . . . . . . . . . . . . . . . . . . . . . . .      10
Plan of Distribution . . . . . . . . . . . . . . . . . . . . . . .      11
Legal Matters  . . . . . . . . . . . . . . . . . . . . . . . . . .      12
Experts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      12


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











                                  6,380,000 SHARES





                                   COCENSYS, INC.


                                    COMMON STOCK

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


                                                       


                                     PROSPECTUS




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


                                   JULY ___, 1998











<PAGE>

                                          
                                          
                                      PART II

                       INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

     The following table sets forth the various expenses expected to be incurred
by the Registrant in connection with the sale and distribution of the securities
being registered hereby.  All amounts are estimated except the Securities and
Exchange Commission registration fee and the Nasdaq National Market listing fee.

<TABLE>
 <S>                                                           <C>
 SEC Registration Fee  . . . . . . . . . . . . . . . . . . .   $        4,806
 Nasdaq National Market Listing Fee  . . . . . . . . . . . .           17,500
 Accounting Fees and Expenses  . . . . . . . . . . . . . . .            5,000
 Legal Fees and Expenses   . . . . . . . . . . . . . . . . .           20,000
 Printing Expenses   . . . . . . . . . . . . . . . . . . . .            1,000
 Miscellaneous Fees and Expenses . . . . . . . . . . . . . .            1,694

      Total                                                     $      50,000

</TABLE>

ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS

     The Registrant's Certificate of Incorporation and Bylaws include provisions
to (i) eliminate the personal liability of its directors for monetary damages
resulting from breaches of their fiduciary duty to the extent permitted by
Section 102(b)(7) of the General Corporation Law of Delaware (the "Delaware
Law") and (ii) authorize the Registrant to indemnify its directors and officers
to the fullest extent permitted by Section 145 of the Delaware Law, including
circumstances in which indemnification is otherwise discretionary.  Pursuant to
Section 145 of the Delaware Law, a corporation generally has the power to
indemnify its present and former directors, officers, employees and agents
against expenses incurred by them in connection with any suit to which they are,
or are threatened to be made, a party by reason of their serving in such
positions so long as they acted in good faith and in a manner they reasonably
believed to be in, or not opposed to, the best interests of a corporation, and
with respect to any criminal action, they had no reasonable cause to believe
their conduct was unlawful.  The Registrant believes that these provisions are
necessary to attract and retain qualified persons as directors and officers. 
These provisions do not eliminate liability for breach of the director's duty of
loyalty to the Registrant or its stockholders, for acts or omissions not in good
faith or involving intentional misconduct or knowing violations of law, for any
transaction from which the director derived an improper personal benefit or for
any willful or negligent payment of any unlawful dividend or any unlawful stock
purchase agreement or redemption.


     The Registrant has entered into agreements with its directors and executive
officers that require the Registrant to indemnify such persons against expenses,
judgments, fines, settlements and other amounts actually and reasonably incurred
(including expenses of a derivative action) in connection with any proceeding,
whether actual or threatened, to which any such person may be made a party by
reason of the fact that such person is or was a director or officer of the
Registrant or any of its listed enterprises, provided such person acted in good
faith and in a manner such person reasonably believed to be in or not opposed to
the best interests of the Registrant and, with respect to any criminal
proceeding, had no reasonable cause to believe his or her conduct was unlawful. 
The indemnification agreements also set forth certain procedures that will apply
in the event of a claim for indemnification thereunder.


     The Registrant has purchased an insurance policy covering the officers and
directors of the Registrant with respect to certain liabilities arising under
the Securities Act or otherwise.

                                    II-1
<PAGE>

ITEM 16.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

     The exhibits listed in the Exhibit Index are filed as part of this
Registration Statement.

     (a)  Exhibits

ITEM 17.  UNDERTAKINGS

     The undersigned Registrant hereby undertakes:

     (1)  To file, during any period in which offers or sales are being made, a
post-effective amendment to this Registration Statement: (i) to include any
prospectus required by Section 10(a) (3) of the Securities Act; (ii) to reflect
in the prospectus any facts or events arising after the effective date of the
Registration Statement (or the most recent post-effective amendment thereof)
which, individually or in the aggregate, represent a fundamental change in the
information set forth in the Registration Statement; and (iii) to include any
material information with respect to the plan of distribution not previously
disclosed in the Registration Statement or any material change to such
information in the Registration Statement; provided, however, that (i) and (ii)
do not apply if the Registration Statement is on Form S-3 or Form S-8, and the
information required to be included in a post-effective amendment by (i) and
(ii) is contained in periodic reports filed with or furnished to the Commission
by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act
that are incorporated by reference in the Registration Statement.

     (2)  That, for the purpose of determining any liability under the
Securities Act, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

     (3)  To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of the
offering.

     Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Securities Act
and is, therefore, unenforceable.  In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.

     The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to Section 15(d) of the Exchange Act) that is
incorporated by reference in the Registration Statement shall be deemed to be a
new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

     The undersigned Registrant hereby undertakes that:

     (1)  For purposes of determining any liability under the Securities Act,
the information omitted from the form of prospectus filed as part of this
Registration Statement in reliance upon Rule 430A and contained in a form of
prospectus filed by the Registrant pursuant to Rule 424(b) (1) or (4) or 497(h)
under the Securities Act shall be deemed to be part of this Registration
Statement as of the time it was declared effective.

     (2)  For purposes of determining any liability under the Securities Act,
each post-effective amendment that contains a form of prospectus shall be deemed
to be a new registration statement relating to the securities offered therein,
and the offering of such securities at that time shall be deemed to be the
initial bona fide offering thereof.

                                        II-2

<PAGE>

                                     SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Company
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Irvine, County of Orange, State of California, on the
7th day of July, 1998.

                              COCENSYS, INC.


                              By:  /s/ F. Richard Nichol, Ph.D.         
                                   -------------------------------------
                                   F. Richard Nichol, Ph.D.
                                   President and Chief Executive Officer

                                 POWER OF ATTORNEY

     KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below does hereby constitute and appoint jointly and severally, Peter E.
Jansen and Robert Holmen, or either of them, as his or her true and lawful
attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him or her and in his or her name, place and stead, in any
and all capacities, to sign the Registration Statement filed herewith and any
and all amendments to said Registration Statement (including post-effective
amendments and registration statements filed pursuant to Rule 462 and
otherwise), and to file the same, with all exhibits thereto, and other documents
in connection therewith, with the Securities and Exchange Commission, granting
unto said attorneys-in-fact and agents, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary
to be done in connection therewith, as fully to all intents and purposes as he
or she might or could do in person, hereby ratifying and confirming all that
said attorneys-in-fact and agents, or any of them, or their substitute of
substitutes, may lawfully do or cause to be done by virtue hereof.

                                       II-3

<PAGE>

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below by the persons whose signatures
appear below, which persons have signed such Registration Statement in the
capacities and on the dates indicated:

<TABLE>
<CAPTION>

SIGNATURE                                 TITLE                                   DATE
- ----------                              ---------                                ------
<S>                                   <C>                                     <C>

/s/ F. Richard Nichol, Ph.D.          President, Chief Executive              July 7, 1998
- ----------------------------          Officer and Director
 F. Richard Nichol Ph.D.              (PRINCIPAL EXECUTIVE OFFICER)


/s/ Peter E. Jansen                   Vice President and Chief                July 7, 1998
- ----------------------------          Financial Officer
 Peter E. Jansen                      (PRINCIPAL FINANCIAL AND
                                       ACCOUNTING OFFICER)


/s/ Lowell E. Sears                                                           July 7, 1998
- ----------------------------          Chairman of the Board
 Lowell E. Sears


/s/ James C. Blair, Ph.D.                                                      July 7, 1998
- ----------------------------          Director
 James C. Blair, Ph.D.


/s/ Kelvin W. Gee, Ph.D.                                                       July 7, 1998
- ----------------------------          Director
 Kelvin W. Gee, Ph.D.


- ----------------------------          Director                                 July  , 1998
 Alan C. Mendelson


/s/ Timothy J. Rink, M.D., Sc.D.                                               July 7, 1998
- ----------------------------          Director
 Timothy J. Rink, M.D., Sc.D.


/s/ Robert L. Roe, M.D.                                                        July 7, 1998
- ----------------------------          Director
 Robert L. Roe, M.D.



- ----------------------------          Director                                 July  , 1998
 Eckard Weber, M.D.

</TABLE>

                                            II-4

<PAGE>
                                     
                                      INDEX TO EXHIBITS

<TABLE>
<CAPTION>
EXHIBIT 
NUMBER         DESCRIPTION OF DOCUMENT
- --------       -----------------------
<S>           <C>

 5.1          Opinion of Cooley Godward LLP

23.1          Consent of Independent Auditors

23.2          Consent of Cooley Godward LLP.  Reference is made to Exhibit 5.1.

24.1          Power of Attorney. Reference is made to pages II-3 and 4.

</TABLE>



<PAGE>

                                                                  EXHIBIT 5.1

                       [COOLEY GODWARD LETTERHEAD]


July 7, 1998


CoCensys, Inc.
201 Technology Drive
Irvine, CA 92618

Ladies and Gentleman:

You have requested our opinion with respect to certain matters in connection 
with the filing by CoCensys, Inc., a Delaware corporation (the "Company"), of 
a Registration Statement on Form S-3 (the "Registration Statement") with the 
Securities and Exchange Commission (the "Commission"), covering the offering 
of a total of 6,380,000 shares of the Company's Common Stock with a par value 
of $0.001 (the "Shares").  Of such Shares, (i) 6,030,000 are issuable upon 
conversion of 10,000 shares of Series E Convertible Preferred Stock (the 
"Preferred Stock") issued by the Company in a private placement in June 1998 
(the "Private Placement") and (ii) 350,000 shares are issuable upon exercise 
of Common Stock Purchase Warrants (the "Warrants") issued by the Company in 
connection with the Private Placement.  All of the Shares are to be sold by 
certain stockholders as described in the Registration Statement.

In connection with this opinion, we have examined and relied upon the 
Registration Statement and related Prospectus included therein, the Company's 
Amended and Restated Certificate of Incorporation and Bylaws, and the 
originals or copies certified to our satisfaction of such records, documents, 
certificates, memoranda and other instruments as in our judgment are 
necessary or appropriate to enable us to render the opinion expressed below.  
We have assumed the genuineness and authenticity of all documents submitted 
to us as originals, and the conformity to originals of all documents where 
due execution and delivery are a prerequisite to the effectiveness thereof. 

On the basis of the foregoing, and in reliance thereon, we are of the opinion 
that the Shares, when issued and delivered upon conversion of the Preferred 
Stock and exercise of the Warrants in accordance with the terms of the 
Certificate of Powers, Designation, Preferences, Rights and Limitations of 
the Preferred Stock and of the Warrants, will be validly issued, fully paid 
and nonassessable.

We consent to the reference to our firm under the caption "Legal Matters" in 
the Prospectus included in the Registration Statement and to the filing of 
this opinion as an exhibit to the Registration Statement.

Very truly yours,


COOLEY GODWARD LLP



By:  /s/ Andrea Vachss




\<PAGE>
                                                                  EXHIBIT 23.1


                    CONSENT OF INDEPENDENT AUDITORS

We consent to the reference to our firm under the caption "Experts" in the 
Registration Statement (Form S-3) and related Prospectus of CoCensys, Inc. 
for the registration of 6,380,000 shares of its common stock and to the 
incorporation by reference therein of our report dated February 6, 1998, with 
respect to the financial statements of CoCensys, Inc. included in its Annual 
Report (Form 10-K) for the year ended December 31, 1997, filed with the 
Securities and Exchange Commission.


                                             /s/Ernst & Young LLP


Orange County, California
July 7, 1998




© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission