OXIS INTERNATIONAL INC
S-3, 1996-12-17
PHARMACEUTICAL PREPARATIONS
Previous: ZURN INDUSTRIES INC, 8-K, 1996-12-17
Next: INVESCO GROWTH FUND INC /CO/, DEFS14A, 1996-12-17



<PAGE>
 
As filed with the Securities and Exchange Commission on December 17, 1996
Registration No. 333-__________

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

                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

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

                                   FORM S-3
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
                                  
                              ------------------ 
                                   
                            OXIS INTERNATIONAL, INC.
             (Exact name of registrant as specified in its charter)

         DELAWARE                                            94-1620407        
(State or other jurisdiction of                          (I.R.S. Employer      
 incorporation or organization)                          Identification Number) 

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

                       6040 N. CUTTER CIRCLE, SUITE 317
                          PORTLAND, OREGON 97217-3935
                                (503) 283-3911
  (Address, including zip code, and telephone number, including area code, of
                    Registrants principal executive offices)
                                        
                              ------------------ 
                                RAY R. ROGERS 
                            CHAIRMAN OF THE BOARD 
                           OXIS INTERNATIONAL, INC. 
                       6040 N. CUTTER CIRCLE, SUITE 317 
                         PORTLAND, OREGON 97217-3935 
                                (503) 283-3911
      (Name, address, including zip code and telephone number, including 
                        area code of agent for service)

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

                                  COPIES TO:
                           RICHARD SCUDELLARI, ESQ.
                        JACKSON TUFTS COLE & BLACK, LLP
                            60 SOUTH MARKET STREET
                          SAN JOSE, CALIFORNIA 95113
                                (408) 998-1952

                              ------------------ 
                                        
        Approximate date of commencement of proposed sale to the public:
   As soon as practicable after the 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]
 
                              ------------------ 

                        CALCULATION OF REGISTRATION FEE
================================================================================
<TABLE>
<CAPTION>
                                                          Proposed Maximum                                          Amount of
     Title of Securities                                   Offering Price         Proposed Maximum Aggregate     Registration Fee
      to be Registered          Amount to be Registered     Per Share (1)             Offering Price (1)     
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>                       <C>                     <C>                            <C>
Common Stock $.50 par value..            5,701,225 (2)        $1.34375                  $7,661,021.09               $2,321.52
===================================================================================================================================
</TABLE>
<PAGE>
 
(1)  Estimated solely for the purpose of calculating the amount of the
registration fee pursuant to Rule 457 based on the average of the bid and
asked prices for the Common Stock, as reported by prices on the Nasdaq
National Market on December 16, 1996.

(2) Includes 55,000 shares issued in connection with an offering of Series E
Preferred Stock and Common Stock, a maximum of 2,678,799 shares issuable upon
conversion of Series E Preferred Stock, an aggregate of 105,778 shares issuable
upon exercise of a warrant issued to the placement agent in connection with such
Series E Preferred Stock placement, a maximum of 2,211,648 shares issuable upon
conversion of Secured Convertible Term Notes dated October 11, 1996 (the
"Notes"), an aggregate of 300,000 shares issuable upon exercise of warrants
issued in connection with such Notes dated October 11, 1996, an aggregate of
150,000 shares issuable upon exercise of warrants issuable pursuant to the terms
of the Notes, and 200,000 shares issuable upon exercise of a warrant issued to a
prior placement agent and financial advisor.

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

     Pursuant to Rule 429 under the Securities Act of 1933, the Prospectus
contained in this Registration Statement is a combined Prospectus and also
relates to an aggregate of 5,075,073 shares of Common Stock registered on
Registration Statement No. 33-61087 on Form S-3 and an aggregate of 9,306,426
shares of Common Stock registered on Registration Statement No. 333-5921 on Form
S-3.

                                      -2-
<PAGE>
 
                           OXIS INTERNATIONAL, INC.
                             CROSS REFERENCE SHEET

                   Between Items of Form S-3 and Prospectus

<TABLE>
<CAPTION>
 
 
    REGISTRATION STATEMENT ITEM AND HEADING    PROSPECTUS CAPTION
    ---------------------------------------    ------------------
<C>   <S>                                      <C>                                  
 1.   Front of Registration                    Outside Front Cover Page             
      Statement and Outside Front                                                   
      Cover of Prospectus                                                           
 2.   Inside Front and Outside                 Front and Outside Back Cover Pages   
      Back Cover Pages of                                                           
      Prospectus                                                                    
 3.   Risk Factors                             Risk Factors                         
 4.   Use of Proceeds                          Use of Proceeds                      
 5.   Determination of Offering                Not Applicable                       
      Price                                                                         
 6.   Dilution                                 Not Applicable                       
 7.   Selling Security Holders                 Selling Stockholders                 
 8.   Plan of Distribution                     Cover Page; Plan of Distribution     
 9.   Description of Securities                Incorporation of Certain Documents by
                                               Reference                             
10.   Interest of Named Experts                Not Applicable                             
      and Counsel                                                                         
11.   Material Changes                         Incorporation of Certain Documents by      
                                               Reference                                  
12.   Incorporation of Certain                 Incorporation of Certain Documents by      
      Information                              Reference                                  
13.   Disclosure of Commission                 Undertakings; Indemnification of Officers  
      Position on Indemnification              and Directors                              
      for Securities Act                                                                  
      Liabilities                                                                         
14.   Other Expenses of Issuance               Other Expenses of Issuance and Distribution
      and Distribution                                                                    
15.   Indemnification of Directors             Indemnification of Officers and Directors  
      and Officers                                                                        
16.   Exhibits                                 Exhibits                                   
17.   Undertakings                             Undertakings                                
 
</TABLE>

                                      -3-
<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.

                                  PROSPECTUS

                           OXIS INTERNATIONAL, INC.
                               19,920,823 SHARES
                                 COMMON STOCK
                               ________________


     This Prospectus relates to 19,920,823 shares of Common Stock, par value
$.50 (the Common Stock), of OXIS International, Inc. (OXIS or the Company) which
are being offered and sold by certain security holders of the Company, including
officers and directors of the Company (the Selling Stockholders).  The above
19,920,823 shares of Common Stock being offered hereby include an aggregate of
5,043,410 shares which are issuable upon conversion of the Company's Series C
Preferred Stock, Series D Preferred Stock, and Series E Preferred Stock and an
aggregate of 2,211,648 shares which are issuable upon conversion of the
Company's Secured Convertible Term Notes only upon the occurrence of certain
events.  The 19,920,823 shares of Common Stock being offered hereby, if all of
the securities pursuant to which shares of Common Stock being offered hereby
could be issued were to be converted or exercised, would represent approximately
seventy-six percent (76%) of the issued and outstanding shares of Common Stock
of the Company.  The Selling Stockholders, directly or through agents, broker-
dealers or underwriters, may sell the Common Stock offered hereby from time to
time on terms to be determined at the time of sale, in transactions on the
Nasdaq National Market or in privately negotiated transactions or otherwise.
The Selling Stockholders and any agents, broker-dealers or underwriters that
participate in the distribution of the Common Stock may be deemed to be
underwriters within the meaning of the Securities Act of 1933, as amended (the
"Act"), and any commission received by them and any profit on the resale of the
Common Stock purchased by them may be deemed to be underwriting discounts or
commissions under the Act.  See Selling Stockholders and Plan of Distribution.

     The Common Stock of the Company is quoted on the Nasdaq National Market
under the symbol OXIS.  The last reported sales price of the Companys Common
Stock on the Nasdaq National Market on December 13, 1996 was $1.4375 per share.

                          ___________________________

               THE SHARES OF COMMON STOCK OFFERED HEREBY INVOLVE
                   A HIGH DEGREE OF RISK.  SEE RISK FACTORS
                       AT PAGE NINE OF THIS PROSPECTUS.
                          ___________________________

         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. 

                            _______________________

                                      -4-
<PAGE>
 
 CAUTIONARY STATEMENT FOR PURPOSES OF THE SAFE HARBOR PROVISIONS OF THE PRIVATE
                    SECURITIES LITIGATION REFORM ACT OF 1995

     This Prospectus contains or incorporates by reference certain "forward-
     looking" statements.  The Company desires to take advantage of the new
     "safe harbor" provisions of the Private Securities Litigation Reform Act of
     1995 and is including this statement for the express purpose of availing
     itself of the protections of such safe harbor with respect to all of such
     forward-looking statements.  Examples of forward-looking statements
     contained or incorporated by reference herein include the Company's
     projections with respect to:  (a) the development, marketing and sales of
     Company products; (b) the availability of products and services from
     independent third parties; (c) the Company's future financial results,
     capital needs and sources of financing; and (d) the effect of certain
     legislation and governmental regulations on the Company.  The Company's
     ability to predict any of such projected results or to predict the effect
     of any legislation or other pending events on the Company's operating
     results is inherently uncertain.  Therefore, the Company wishes to caution
     each reader of this Prospectus to carefully consider the specific factors
     discussed with such forward-looking statements as such factors in some
     cases have affected, and in the future (together with other factors) could
     affect, the ability of the Company to achieve its projected results and may
     cause actual results to differ materially from those expressed herein.

     No underwriting commissions or discounts will be paid by the Company in
connection with this offering.  Estimated expenses payable by the Company in
connection with this offering are $47,322.  See Plan of Distribution.  The
aggregate proceeds to the Selling Stockholders from the Common Stock will be the
purchase price of the Common Stock sold less the aggregate agents commissions
and underwriters discounts, if any.  The aggregate proceeds to the Company from
the Common Stock, if any, will be the cancellation of debt by means of the
conversion of the secured convertible term notes ($1,000,000 in principal, plus
any accrued and unpaid interest), and the exercise price for the warrants and
options to purchase Common Stock offered hereunder (a maximum of $6,832,000 in
the aggregate assuming the exercise of all such warrants and options.)  In
addition, in certain events the Company may issue additional warrants to the
holders of the secured convertible term notes, the exercise price of which to be
received by the Company will be set at the time such warrants are issued.

     The Company has agreed to indemnify certain of the Selling Stockholders and
certain other persons against certain liabilities, including liabilities under
the Act.

                The date of this Prospectus is December 16, 1996

                                      -5-
<PAGE>
 
                             AVAILABLE INFORMATION


     The Company is subject to the reporting requirements of the Securities
Exchange Act of 1934, as amended (the Exchange Act), and in accordance
therewith, files annual and quarterly reports, proxy statements and other
information with the Securities and Exchange Commission (the Commission).  Such
reports, proxy statements and other information may be inspected and copied at
the Commissions Regional Offices at 7 World Trade Center, 13th Floor, New York,
New York 10048; and 500 West Madison Street, Suite 1400, Chicago, Illinois
60661-2511.  Copies of such material can be obtained at prescribed rates from
the Public Reference Section of the Commission at 450 Fifth Street, N.W.,
Washington, D.C. 20549.  The Commission maintains a Web site that contains
reports, proxy and information statements and other information regarding
issuers that file electronically with the Commission. The Commission's Web site
may be accessed at http://www.sec.gov.  The Common Stock of the Company is
quoted on the Nasdaq National Market.  Reports 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.

     No dealer, salesman 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 other information or representations
must not be relied upon as having been authorized by the Company.  This
Prospectus does not constitute an offer or solicitation by anyone in any state
in which such offer or solicitation is not authorized, or in which the person
making such offer or solicitation is not qualified to do so, or to any person to
whom it is unlawful to make such offer or solicitation.  The delivery of this
Prospectus at any time does not imply that information herein is correct as of
any time subsequent to the date hereof.

                            ADDITIONAL INFORMATION

     A registration statement on Form S-3 with respect to the Common Stock
offered hereby (the Registration Statement) has been filed with the Commission
under the Act.  This Prospectus does not contain all of the information
contained in such Registration Statement and the exhibits and schedules thereto,
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 Common Stock offered hereby, reference is made to the
Registration Statement and the exhibits and schedules thereto.  Statements
contained in this Prospectus regarding the contents of any contract or any other
document are not necessarily complete and, in each instance, reference is hereby
made to the copy of such contract or document filed as an exhibit to the
Registration Statement.  The Registration Statement, including exhibits thereto,
may be inspected without charge at the Commissions principal office in
Washington, D.C., and copies of all or any part thereof may be obtained from the
Public Reference Section, Securities and Exchange Commission, Washington, D.C.,
20549, upon payment of the prescribed fees.

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The following documents, filed or to be filed with the Commission under the
Exchange Act are hereby incorporated by reference into this Prospectus:

   (i)    The Companys Annual Report on Form 10-K for the fiscal year ended
          December 31, 1995, as amended, including all material incorporated by
          reference therein.

                                      -6-
<PAGE>
 
   (ii)   The Companys Quarterly Report on Form 10-Q for the quarterly period
          ended March 31, 1996.

   (iii)  The Companys Current Report on Form 8-K filed with the Commission on
          May 24, 1996.

   (iv)   The Companys Current Report on Form 8-K filed with the Commission on
          June 21, 1996.

   (v)    The Company's Quarterly Report on Form 10-Q for the quarterly period
          ended June 30, 1996.

   (vi)   The Company's Current Report on Form 8-K/A filed with the Commission
          on September 29, 1996.

   (vii)  The Companys Current Report on Form 8-K filed with the Commission on
          November 4, 1996.

   (viii) The Company's Quarterly Report on Form 10-Q for the quarterly
          period ended September 30, 1996.

   (ix)   The description of the Registrant's Common Stock contained in the
          Company's Prospectus dated June 18, 1969 (File No. 0361150) filed
          pursuant to Section 12 of the Exchange Act on June 23, 1969.

     All documents filed by the Company pursuant to Sections 13(a), 13(c), 14 or
15(d) of the Exchange Act after the date of this Prospectus and prior to the
termination of the offering shall be deemed to be incorporated by reference
herein and to be a part hereof from the date of filing of such documents.  Any
statement contained in this Prospectus or in a document incorporated or deemed
to be incorporated by reference herein shall be deemed to be modified or
superseded for purposes of this Prospectus to the extent that a statement
contained herein or in any subsequently-filed document which also is or is
deemed to be incorporated by reference herein modifies or supersedes such
statement.  Any such statement so modified or superseded shall not be deemed,
except as so modified or superseded, to constitute a part of this Prospectus.

     The Company will provide without charge to each person, including any
beneficial owner, to whom this Prospectus is delivered, upon written or oral
request of such person, a copy of any and all of the documents that have been
incorporated by reference herein (not including exhibits to such documents
unless such exhibits are specifically incorporated by reference herein or into
such documents).  Such request may be directed to OXIS International, Inc., 6040
N. Cutter Circle, Suite 317, Portland, OR 97217-3935, telephone (503) 283-3911,
Attn:  Jon S. Pitcher, Chief Financial Officer.

                                      -7-
<PAGE>
 
                                  THE COMPANY


     The Company was initially incorporated in 1965 as Diagnostic Data, Inc., a
California corporation.  It was reincorporated in Delaware in 1974, and adopted
the name DDI Pharmaceuticals, Inc. in 1985.  In September 1994, the Company
acquired Bioxytech S.A., based in France (Bioxytech), and merged with
International BioClinical, Inc. (IBC), an Oregon corporation (the Combination),
and changed its name to OXIS International, Inc.  Bioxytech was acquired through
an exchange of shares that resulted in the Company owning in excess of 99% of
the outstanding stock of Bioxytech, which operates as a subsidiary of the
Company and has been renamed "OXIS International, S.A."  In July 1995, the
Company acquired Therox Pharmaceuticals, Inc., a Delaware corporation
("Therox"), a Philadelphia-based free radical therapeutics company funded by
S.R. One, Limited, the venture capital subsidiary of SmithKline Beecham, and
Brantley Venture Partners II, L.P.

     OXIS is engaged in the discovery, development, manufacture and marketing of
products to diagnose, treat and prevent the pathologic effects of free radicals
(i.e., diseases of oxidative stress).  Free radicals are highly reactive
molecules that are damaging to cells when their concentration exceeds the body's
antioxidant defense capacity.  Oxidative stress is now thought to be a basic
mechanism of cell damage and death in a number of acute and chronic diseases
such as atherosclerosis, AIDS, cancer, diabetes, arthritis and traumatic injury.
Concomitantly, advances in molecular biology are beginning to clarify the
mechanism(s) of cellular damage by free radicals and driving market demand for
new products to diagnose, treat and prevent diseases of oxidative stress.  The
Company sells research assays for markers of oxidative stress, clinical
therapeutic drug monitoring ("TDM") assays and bovine superoxide dismutase
("bSOD").  In addition, the Company has several therapeutic research and
development programs, with lead molecules identified for two different series of
compounds, a glutathione peroxidase mimic and a lipid soluble antioxidant.  The
Companys staff consists of approximately 52 managers, scientists, technicians
and administrative personnel who are currently located at two sites.

     The Company's principal executive offices are located at 6040 N. Cutter
Circle, Suite 317, Portland, OR 97217-3935.  Research and development operations
of OXIS are located at Z.A. des Petits Carreaux, 2 av. des Coquellcots, F 94385
Bonneull-Sur-Marne, Cedex, France (outside of Paris).

                                      -8-
<PAGE>
 
                                 RISK FACTORS

     The following are the significant risk factors that should be considered
carefully in evaluating the Common Stock of OXIS.

NEED FOR ADDITIONAL FINANCING.

     The Company has incurred losses in each of the last five years.  As of
September 30, 1996, the Company had an accumulated deficit of approximately
$31,500,000.  The Company expects to incur operating losses for the foreseeable
future.  Accordingly, it is anticipated that further financing will be needed
during 1997 to allow the Company to continue its planned research and
development programs and marketing of additional products.  The unavailability
of such anticipated financing could cause the Company to cease or curtail its
operations, and/or delay or prevent the development and marketing of the
Company's potential therapeutic products.  As of the date of this Prospectus,
the Company has raised approximately $6,000,000 (including $843,035 in
cancellation of indebtedness in exchange for Series C Preferred Stock) during
1996 through the sale of shares of its Series C Preferred Stock, Series D
Preferred Stock and Series E Preferred Stock and $1,000,000 in principal of
secured convertible term notes.  In addition, in June 1996, $1,255,000 principal
plus accrued interest of $58,000 on the Company's 8% convertible subordinated
debentures were converted to Common Stock.

     The Company plans to conduct a follow-on public offering of its Common
Stock to provide additional funds for clinical trials for its oxidative stress
assays, complete preclinical studies on synthetic antioxidants, and initiate
early clinical trials.  Such public offering is currently planned to be made on
the Le Nouveau Marche stock exchange in France, subject to obtaining appropriate
authorization from the French stock market regulatory authorities.  Assuming the
successful completion of such offering pursuant to which the Company raises at
least $20,000,000, the Company believes that it will have sufficient capital to
allow it to continue its planned research and development programs and marketing
of additional products through 1998.  Notwithstanding the foregoing, there can
be no assurances that the Company will successfully complete any future private
or follow-on public offering, that the terms of any such offering will be
favorable to the Company, or that if any such offering occurs that funds
generated thereby will be sufficient to complete the Company's contemplated
development programs.

RESEARCH AND DEVELOPMENT STAGE PRODUCTS.

     Much of the Company's success depends on potential products which are in
research and development and no material revenues have been generated to date
from sales of these products.  Although the Company currently markets and sells
research and diagnostic assays, the Company must successfully partner, develop,
obtain regulatory approval for and market or sell its potential therapeutic
products to achieve profitable operations.  The preclinical work for one
potential new therapeutic product is presently nearly completed, and the
clinical development stage has commenced.  No assurance can be given that the
Company's product development efforts will be successfully completed, that
required regulatory approvals will be obtained, or that any such products, if
developed and introduced, will be successfully marketed.  If the Company does
not successfully introduce new products, its revenues and results of operations
will be materially adversely affected.

                                      -9-
<PAGE>
 
FUTURE PROFITABILITY UNCERTAIN.

     The Company expects to incur operating losses for the foreseeable future.
The Company's research and development expenses will increase as the Company
pursues human clinical testing.  These losses and expenses may increase and
fluctuate from quarter to quarter as the Company expands its development
activities.  There can be no assurance that the Company will ever achieve
profitable operations.  The report of the Company's independent auditors on the
Company's  financial statements for the period ended December 31, 1995 included
an explanatory paragraph referring to the Company's ability to continue as a
going concern.  The Company anticipates that it will expend significant capital
resources in product research and development and in human clinical trials.
Capital resources may also be used for the acquisition of complementary
businesses, products or technologies.  OXIS' future capital requirements will
depend on many factors, including:  continued scientific progress in its
research and development programs; the magnitude of these programs; the success
of preclinical and clinical trials; the costs associated with the scale-up of
manufacturing; the time and costs required for regulatory approvals; the time
and costs involved in filing, prosecuting, enforcing and defending patent
claims; technological competition and market developments; the establishment of
and changes in collaborative relationships; and the cost of commercialization
activities and arrangements.

     While the Company believes that its new products and technologies show
considerable promise, its ability to realize significant revenues therefrom is
dependent upon the Company's success in developing business alliances with
biotechnology and/or pharmaceutical companies to develop and market these
products. There is no assurance that the Company's effort to develop such
business alliances will be successful.

     Over the last several years the Company has sold a substantial amount of
its bovine SOD ("bSOD") to Sanofi Winthrop.  However, sales of bSOD to Sanofi
Winthrop have ceased following Sanofi Winthrop's announcement in October 1995
that a second Phase III trial on its drug, DISMUTEC/TM/ coupled form of the
Company's bSOD) to treat trauma related to head injury failed to show
statistically significant improvement between the treatment and control groups.

PRODUCT WITHDRAWALS IN EUROPE; LICENSEES.

     The European market for OXIS' bSOD for human use has been adversely
impacted by a series of regulatory developments over the last few years. In
January 1994, the Italian government rendered a decision to exclude all
orgotein-containing products from the list of drugs eligible for patient
reimbursement.  In addition, OXIS was notified in January 1994 that the
government of Austria had asked the Company's licensee, Grunenthal, to withdraw
Peroxinorm (a form of bSOD) from the Austrian market.  In March 1994, as a
result of two fatalities (December 1993 and February 1994) of patients treated
with Peroxinorm, the German Federal Health Administration asked Grunenthal to
remove Peroxinorm from the German market.  No claim has been made against the
Company in connection with these two fatalities, and the Company does not
believe there is a substantial likelihood of any liability to it as a result of
these two fatalities.

     In addition, the Company's licensee for Spain has had informal discussions
with the Spanish regulatory authorities regarding the Company's bSOD product.
Although no action has been taken by those authorities with regard to the
Company's product, future sales in Spain may be adversely affected by either
regulatory action in Spain, or safety concerns stemming from actions in other
countries.

                                      -10-
<PAGE>
 
     Future sales of bSOD are largely dependent on the needs of the Company's
Spanish licensee (which comprised almost fifty percent of the Company's sales
for the nine-month period ending September 30, 1996).  Thus, the Company's sales
of bulk bSOD after 1996 are uncertain and difficult to predict and no assurances
can be given with respect thereto.

FAILURE TO PROTECT TECHNOLOGY COULD ADVERSELY AFFECT RESULTS; POTENTIAL CLAIMS
OF PATENT INFRINGEMENT; EXPIRATION OF PATENTS.

     The Company's success will depend in part on its proprietary products and
information.  While OXIS has attempted to protect its proprietary products and
information through patents and trade secrets, there can be no assurance that
competitors will not be able to develop similar products and information
independently.  No assurance can be given that patents will be issued on certain
of the Company's pending applications or that the claims allowed on any patents
held by the Company will be sufficiently broad to protect its products and
information.  In addition, no assurance can be given that any patents issued to
the Company will not be challenged, invalidated or circumvented or that the
rights granted thereunder will provide competitive advantages to it.

     In addition, the Company's products and its customers may be alleged to
have infringed third parties' patent rights. While such allegations are
commonplace in the industry and to date the Company has been able to license
necessary patents or technology on commercially reasonable terms, there can be
no assurance that the Company will be able to license necessary patents or
technology on commercially reasonable terms in the future. No assurances can be
given that the Company will prevail in any infringement litigation or that the
costs or damages from any such litigation would not materially and adversely
affect the Company.

     Although the Company continues to have unpatented trade secrets and know-
how, substantially all of the Company's important U.S. and foreign patents
regarding SOD inventions (other than its recently developed, long-acting SOD
derivatives) have expired.  Expiration of the Company's patents may enable other
companies to benefit from research and development efforts of the Company, but
such other companies would not receive the benefits of the Company's unpatented
trade secrets and know-how or unpublished preclinical or clinical data.  Such
other companies would still be required in some countries to expend considerable
resources to conduct preclinical studies and clinical studies of their own
pharmaceutical preparations of SOD and to seek and secure governmental approval
to market such preparations.

GOVERNMENT REGULATION; PRODUCT CLEARANCE AND APPROVAL UNCERTAIN.

     As with other companies in its industry, OXIS' preclinical development,
clinical trials, product manufacturing and marketing are subject to state and
federal regulation by the United States and other countries.  Clinical trials
and product marketing and manufacturing are subject to the rigorous review and
approval processes of the United States Food and Drug Administration ("FDA") and
foreign regulatory authorities.  The process of obtaining FDA and other required
regulatory approvals is lengthy and expensive.  Typically, this requires the
expenditure of substantial resources and takes several years or more with
respect to therapeutic products, depending upon the type, complexity and novelty
of the product and the nature of the disease or other indication to be treated.
Preclinical studies must be conducted in conformance with the FDAs Good
Laboratory Practice regulations.  Clinical testing must meet requirements for
Institutional Review Board ("IRB") oversight and informed consent by clinical
trial subjects, as well as prior FDA review, oversight and the FDA's Good
Clinical Practice requirements.  Clinical trials may require large numbers of
test subjects, complex protocols and possibly lengthy follow-up 

                                      -11-
<PAGE>
 
periods. OXIS has limited experience in conducting clinical testing and in
pursuing applications necessary to gain regulatory approvals. Furthermore, the
Company or the FDA may suspend clinical trials at any time if either believes
that the subjects participating in such trials are being exposed to unacceptable
health risks, including undesirable or unintended side effects.

     Before receiving FDA approval to market a product, OXIS may have to
demonstrate that the product represents an improved form of treatment compared
to existing therapies.  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 government regulation from future legislation or
administrative action or changes in FDA policy during the period of product
development, clinical trials and FDA regulatory review.  Delays in obtaining
such approvals could adversely affect marketing of OXIS products.  Delays in
regulatory approvals that may be encountered by OXIS' joint development partners
and licensees could adversely affect OXIS' ability to receive royalties or other
revenues.  There can be no assurance that, after such time and expenditures,
regulatory approval will be obtained for any products developed by the Company.
Even after initial FDA approval has been obtained, further studies may be
required to provide additional data on safety or to gain approval for the use of
a product as a treatment for clinical indications other than those initially
targeted.  Moreover, the FDA may reconsider its approval of any product at any
time and may withdraw such approval.  In addition, before the Company's products
can be marketed in foreign countries, they are subject to regulatory approval in
such countries similar to that required in the United States.  Furthermore,
approval may entail ongoing requirements for post-marketing studies.

     The FDA's regulations require that any drug or formulation to be tested in
humans must be manufactured according to current Good Manufacturing Practices
regulations ("cGMPs"). This has been extended to include any drugs which will be
tested for safety in animals, in support of human testing. The cGMPs set certain
minimum requirements for procedures, record-keeping and the physical
characteristics of the laboratories used in the production of these drugs. In
addition, various federal and state laws, regulations and recommendations
relating to safe working conditions, laboratory practices, the experimental use
of animals and the purchase, storage, movement, import and export, use, and
disposal of hazardous or potentially hazardous substances, including radioactive
compounds and infectious disease agents, used in connection with the Companys
research work are or may be applicable to their activities. They include, among
others, the United States Atomic Energy Act, the Clean Air Act, the Clean Water
Act, the Occupational Safety and Health Act, the National Environmental Policy
Act, the Toxic Substances Control Act, and the Resources Conservation and
Recovery Act, national restrictions on technology transfer, import, export and
customs regulations, and other present and possible future local, state or
federal regulation. OXIS is unable to estimate the extent and impact of
regulation resulting from such future federal, state or local legislation or
administrative action.

     Outside the United States, the Company's ability to market a product is
contingent upon receiving marketing authorization from the appropriate foreign
regulatory authorities, which may impose substantial additional costs and
burdens.  The requirements governing the conduct of clinical trials, marketing
authorization, pricing and reimbursement vary widely from country to country.
Many countries also impose product standards, packaging requirements, labeling
requirements and import restrictions on drugs.  Furthermore, the foreign
regulatory approval process may include all of the risks associated with FDA
approval set forth above.

                                      -12-
<PAGE>
 
RISK OF PRODUCT LIABILITY; USE OF HAZARDOUS MATERIALS; LIMITED INSURANCE
COVERAGE.

     The testing, marketing and sale of human therapeutic products entails
significant risks.  If the Company succeeds in developing products in these
areas, use of such products in trials and the sale of such products following
regulatory approval may expose the Company to liability claims allegedly
resulting from use of such products.  These claims might be made directly by
consumers or others.  OXIS currently has only limited insurance for its clinical
trials.  Further, there can be no assurance that OXIS will be able to obtain and
maintain such insurance for all of its clinical trials or that coverage will be
in sufficient amounts to protect against damages for liability that could have a
material adverse effect on OXIS.  There can also be no assurance that OXIS will
be able to obtain or maintain product liability insurance in the future on
acceptable terms or in sufficient amounts to protect the Company against damages
for liability that could have a material adverse effect on the Company.

     In addition, the Company's research and development involves the controlled
use of hazardous materials, radioactive compounds and other chemicals.  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 additional
manufacturing capacity.

COMPANY IS IN HIGHLY COMPETITIVE BUSINESS.

     The pharmaceutical industry is highly competitive.  Competition in most of
the Company's primary current and potential product areas from large
pharmaceutical companies, and other companies, universities and research
institutions is intense and expected to increase.  Relative to the Company, many
of these entities have substantially greater capital resources, research and
development staffs, facilities and experience in conducting clinical trials and
obtaining regulatory approvals, as well as in manufacturing and marketing
diagnostic and pharmaceutical products.  In addition, these and other entities
may have or may develop new technologies or use existing technologies that are,
or may in the future be, the basis for competitive products.

     Any potential products that the Company succeeds in developing and for
which it gains regulatory approval will have to compete for market acceptance
and market share.  For certain of the Company's potential products, an important
factor in such competition may be the timing of market introduction of
competitive products.  Accordingly, the relative speed with which the Company
can develop products, complete the clinical testing and regulatory approval
processes and supply commercial quantities of the product to the market are
expected to be important competitive factors.  The Company expects that a
competitive edge will be based, among other things, on product efficacy, safety,
reliability, availability, timing and scope of regulatory approval and product
price.  There can be no assurance that the Company's competitors will not
develop technologies and products that are more effective than those being
developed by the Company.  In addition, certain of the Company's competitors may
achieve product commercialization or patent protection prior to OXIS.

                                      -13-
<PAGE>
 
     The Company's therapeutic drug monitoring products compete directly with
similar products from major diagnostic companies such as Abbott, Roche
Laboratories ("Roche"), E.I. DuPont de Nemours ("DuPont") and others.  Since one
of the Company's business strategies is to provide alternative reagents to
customers who own or rent the Abbott TDx(R)/TDxFLx(R) analyzers, Abbott is the
Company's major competitor in this area.  The Company competes based on high
product quality, an aggressive pricing strategy and technical services.  The
Company seeks to protect itself from competition in connection with its
development of custom assays for pharmaceutical companies by generally obtaining
exclusive manufacturing and marketing rights.  Market position for these unique
assays can be enhanced through patents and trade secrets, but in the absence of
such protection other companies could develop comparable assays; and even if
patent protection is obtained, competing companies could still develop
competitive assays.

     The Company believes it is a leader in the development of assays for
markers of oxidative stress.  Although there are currently a limited number of
competitors for the Company's assays to measure markers of oxidative stress, no
assurances can be given that significant competition will not arise in the
future.  Two competitors in the area of oxidative stress testing are Randox
Laboratories, based in the United Kingdom, and Pantox Laboratories, based in San
Diego, California, in the United States.  Both companies are privately held.

     Some pharmaceutical companies are pursuing the development of synthetic
molecules to treat diseases of oxidative stress.  The Company's major
competitors in the area of synthetic antioxidants include Transcend
Therapeutics, Inc., formerly Free Radical Sciences, Inc. ("Transcend
Therapeutics") and Centaur Pharmaceuticals ("Centaur").  Transcend Therapeutics
is testing a drug called procysteine for use in Adult Respiratory Distress
Syndrome and other diseases and Centaur is developing molecules called "spin
traps" for the treatment of diseases of the central nervous system.
Natterman/Rhone Poulenc Rorer and Daiichi are also developing glutathione
peroxidase mimics.

MANUFACTURING/DEPENDENCE ON OTHERS.

     Certain of the Company's products, and raw materials used in its products,
are produced by independent third parties.  The Company is and will continue to
be dependent upon these third parties to produce products and supply materials
with acceptable quality and to deliver them to the Company in a timely manner.
The Company depends on these manufacturers to achieve acceptable manufacturing
yields and to allocate to the Company a sufficient portion of their capacity to
meet the Company's needs.  The Company believes that its current third-party
suppliers have sufficient manufacturing capacity to expand production, if
necessary, for the foreseeable future.  The Company has established a quality
control program, including a set of standard documentation procedures intended
to ensure that, where required, the Company's products are manufactured in
accordance with GMP.  Although the Company has not experienced material quality
or allocation problems to date, there can be no assurance that such problems
will not have a material adverse effect on the Company's business, financial
condition and results of operations in the future.  Furthermore, constraints or
delays in the supply of the Company's products and materials used therein could
result in the loss of customers, the delay of development projects and other
adverse effects on the Company's business, financial condition and results of
operations.  The Company's reliance on third party manufacturers and suppliers
involves several other risks, including reduced control over delivery schedules,
quality assurance and costs.  Foreign manufacturers and suppliers are subject to
additional risks such as changes in governmental policies, imposition of tariffs
and import restrictions and other factors beyond the Company's control.

                                      -14-
<PAGE>
 
POSSIBLE HEALTH CARE REFORM LEGISLATION AND REIMBURSEMENT ISSUES.

     OXIS' ability to successfully commercialize human therapeutic products may
depend in part on the extent to which reimbursement for the cost of such
products and related treatment will be available from government health
administration authorities, private health coverage insurers and other
organizations.  Significant uncertainty exists as to the reimbursement status of
newly approved healthcare products, and there can be no assurance that adequate
third party coverage will be available for OXIS to maintain price levels
sufficient for realization of an appropriate return on its investment in product
development.  Government and other third-party payers are increasingly
attempting to contain healthcare costs by limiting both coverage and the level
of reimbursement for new therapeutic products approved for marketing by the FDA
and by refusing, in some cases, to provide any coverage for uses of approved
products for disease indications for which the FDA has not granted marketing
approval (so-called off-label usage).  If adequate coverage and reimbursement
levels are not provided by government and third-party payers for uses of OXIS
healthcare products, the market acceptance of these products would be adversely
affected.

     In addition, as with other companies which supply products and services to
the health care industry, the Company faces an uncertain legislative
environment.  Over the last few years, the United States Congress, the President
and various state governments have advanced various health care bills that could
significantly alter the structure of the health care industry.  Regardless of
whether or not a health care bill is adopted, private businesses are placing
increasing pressure on health care providers to reduce costs.  As a result of
these factors, the Company may be forced to reduce the prices of its
pharmaceutical products.  This uncertain legislative and business environment
may also adversely affect the Company's ability to raise capital.

FOREIGN CURRENCY AND TAX EXPOSURE.

     The Company's French subsidiary conducts virtually all of its non-U.S.
business in currencies other than the U.S. dollar and the Company buys and sells
the majority of its SOD in a foreign currency.  Accordingly, foreign currency
fluctuations may affect the Company's earnings and asset valuations.  The
Company may be affected by laws affecting its ability to repatriate foreign
profits, if any, and by foreign tax laws, as well as by fluctuating tax rates
and changes in international tax treaties.  There can be no assurance that laws
and changes such as these will not have a material adverse impact on the
Company's operations.

LABOR LAWS IN FRANCE.

     Approximately forty percent (40%) of the Company's personnel are located in
France.  The Company is subject to the Convention Collective Nationale des
Industries Chimiques (Chemical Industry Convention) which regulates the terms of
employment contracts and employment conditions and determines certain mandatory
obligations of the Company regarding wages and benefits of employees.  In
particular, French labor laws offer employees certain rights in the event of
termination which do not exist under U.S. laws.  For example, severance costs in
connection with terminated employees in France typically amount to half of the
employee's annual salary.  French labor laws may inhibit management's ability to
take future personnel actions or implement certain operating plans (such as
reducing the size of the French subsidiary's operations).

                                      -15-
<PAGE>
 
INTERNATIONAL SALES.

     The Company expects that international sales will continue to account for a
substantial portion of the Company's future revenues for the foreseeable future.
The Company's business in foreign markets is and will be subject to the risks
customarily associated with such activities, including fluctuations in foreign
currency exchange rates and controls, expropriation, nationalization and other
economic, tax and regulatory policies of foreign governments as well as the laws
and policies of the United States affecting foreign trade and investment.

FAILURE TO ATTRACT OR RETAIN KEY PERSONNEL COULD ADVERSELY AFFECT RESULTS.

     The Company is dependent upon the efforts and abilities of a number of its
key personnel.  The success of the Company depends to a large extent upon its
ability to retain and attract key employees.  President and Chief Executive
Officer, Dr. Anna D. Barker, Ph.D., has built long-standing academic and
corporate relationships valuable to the Company's professional affiliations and
potential corporate alliances.  Chief Operating Officer, Dr. Timothy C. Rodell,
M.D., joined the Company in March 1996.  Dr. Rodell's clinical experience will
be critical in helping the Company design, submit and initiate clinical trial
protocols in the United States.  The loss of key employees or the Company's
inability to attract and retain other key employees could materially adversely
affect results of operations.  This effect could be particularly significant if
the Company needs to hire, train and assimilate large numbers of new employees.
The Company is not subject to any collective bargaining agreements (other than
the Chemical Industry Convention in France discussed under "Labor Laws in
France" above), and believes its relationship with its employees is good.

VOLATILITY OF STOCK PRICE; SHARES AVAILABLE FOR FUTURE SALE; ABSENCE OF
DIVIDENDS.

     The market prices for securities of biotechnology and pharmaceutical
companies, including the securities of OXIS, have been volatile.  Announcements
of technological innovations or new commercial products by OXIS or its
competitors, a change in status of a corporate partner, developments concerning
proprietary rights, including patents and litigation matters, publicity
regarding actual or potential medical results with products under development by
OXIS, regulatory developments in both the United States and foreign countries
and public concern as to the safety of biotechnology or of pharmaceutical
products, as well as period-to-period fluctuations in revenues and financial
results, may have a significant impact on the market price of the Company's
Common Stock.  OXIS has not paid any cash dividends since its inception, and it
does not anticipate paying cash dividends in the foreseeable future.

     As of December 16, 1996, the Company had 13,790,736 shares of Common Stock
outstanding.  2,200,000 shares of Common Stock are reserved for issuance under
the Company's 1994 Stock Incentive Plan (the "Plan").  The Company has options
or warrants outstanding to purchase a total of approximately 4,466,420 shares of
Common Stock of which options to purchase 214,699 shares of Common Stock were
granted in connection with the acquisition of International BioClinical, Inc.
and Bioxytech S.A. (now OXIS International S.A.) and of which options to
purchase 1,422,833 shares have been granted pursuant to the Plan.  Pursuant to a
Registration Statement on Form S-3 declared effective by the Securities and
Exchange Commission on September 13, 1995, the Company registered an aggregate
of 5,075,073 shares of Common Stock, which may now be sold into the public
securities markets.  Pursuant to a Registration Statement on Form S-3 declared
effective by the Securities and Exchange Commission on August 27, 1996, the
Company registered an aggregate of 9,306,426 shares of Common Stock 

                                      -16-
<PAGE>
 
which may be sold into the public securities market. (The foregoing 14,381,499
shares of Common Stock are included in the section of this Prospectus entitled
"Selling Stockholders" because this Prospectus is intended for use in connection
with the resale of such securities in addition to those shares being registered
pursuant to the Registration Statement being filed currently.) Pursuant to a
Registration Statement on Form S-8 effective upon filing with the Securities and
Exchange Commission on November 20, 1995, the Company registered for resale
1,200,000 shares of Common Stock under the Plan and 85,781 additional shares
subject to certain other options. In the near future, the Company expects to
file an additional Registration Statement on Form S-8 to register 1,000,000
additional shares covered by the Plan. The shares once registered may be sold
into the public securities markets upon issuance under the Plan or exercise of
the options outside of the Plan.

     Pursuant to this Registration Statement, the Company is registering for
resale an aggregate of 200,000 shares issuable upon exercise of a warrant issued
to a former placement agent, an aggregate of 2,211,648 shares issuable upon
conversion of secured convertible term promissory notes, 300,000 shares issuable
upon exercise of warrants issued in connection with such notes, an aggregate of
150,000 shares issuable upon exercise of warrants possibly to be issued pursuant
to the terms of such secured convertible term notes, an aggregate of 2,678,799
shares issuable upon conversion of Series E Preferred Stock, an aggregate of
55,000 shares issued in connection with such Series E Preferred Stock, and
105,778 shares issuable upon exercise of a warrant issued to the placement agent
for such offering of Series E Preferred Stock and Common Stock.

     Subject to certain agreements limiting the number of shares certain of the
Selling Stockholders may sell (see "Plan of Distribution"), the above shares may
be sold into the public securities markets after this Registration Statement
becomes effective.  The registration of Common Stock pursuant to this
Registration Statement will result in an increase of up to approximately 28% in
the number of shares of the Company's Common Stock available for trading in the
public securities market.  Future sales of Common Stock in the public securities
markets may cause substantial fluctuations (including substantial price
reductions) in the price of the Company's Common Stock over short time periods.
Additionally, the price of the Company's Common Stock will be sensitive to the
performance and prospects of the Company and other factors.

SHARE OWNERSHIP BY CERTAIN INDIVIDUALS AND CONCENTRATION OF OWNERSHIP.

     As of December 16, 1996, Ray R. Rogers, the Chairman of OXIS, owned 701,367
shares of Common Stock and options to purchase shares of Common Stock (excluding
36,116 shares owned by an irrevocable trust for the benefit of Mr. Rogers'
children as to which shares Mr. Rogers has no control).  Dr. Anna D. Barker, the
President and Chief Executive Officer of OXIS, owns 972,137 shares of Common
Stock and options.  Ownership of such Common Stock and Options represents
control by Mr. Rogers and Dr. Barker of approximately 4.39% and 6.09% of the
voting securities of OXIS, respectively.  Alta-Berkeley L.P., II is the owner of
550,774 shares of Common Stock and options and an additional 242,924 shares of
Common Stock issuable upon conversion of Series C Preferred Stock, representing
approximately 4.54% of the voting securities of the Company.  David Needham, a
director of OXIS and a consultant to the investment advisory firm which advises
Alta-Berkeley L.P. II, has a stock option entitling him to purchase 25,000
shares of Common Stock.  Dr. Needham disclaims beneficial ownership of shares of
Common Stock owned by Alta-Berkeley L.P. II.  Timothy G. Biro, a director of
OXIS, has been granted options to purchase an aggregate of 25,000 shares of
Common Stock under the Plan, and was formerly a general partner of Brantley
Venture Partners II, L.P., a Delaware limited partnership 

                                      -17-
<PAGE>
 
which owns an aggregate of 550,699 shares of Common Stock and an aggregate of
214,194 shares of the Company's Series B Preferred Stock (convertible into
Common Stock on approximately a one-to-one basis), for an aggregate of 764,893
shares of OXIS stock (approximately 4.76% of the voting securities of OXIS).
S.R. One, Limited owns 549,497 shares of Common Stock 428,389 shares of Series B
Preferred Stock, a note convertible into 353,982 shares of Common Stock and a
warrant entitling it to purchase 150,000 shares of Common Stock, for an
aggregate of 1,481,878 shares of OXIS stock (approximately 8.82% of the voting
securities of OXIS). Capital Ventures International owns 360,839 shares of
Common Stock, 1,650 shares of Series D Preferred Stock (convertible into
approximately 1,574,063 shares of Common Stock), a note convertible into 353,982
shares of Common Stock and warrants entitling it to purchase 960,126 shares of
Common Stock, for an aggregate of 3,249,010 shares of OXIS Common Stock
(approximately 17.33% of the voting securities of OXIS). As the largest
stockholders of OXIS, Mr. Rogers, Dr. Barker, Alta-Berkeley L.P. II, Brantley
Venture Partners II, L.P., S.R. One, Limited, and Capital Ventures International
are in a position to significantly influence the outcome of matters (including
the election of directors, and any merger, consolidation or sale of all or
substantially all of the Company's assets) submitted to the Company's
stockholders for approval. As a result, certain transactions may not be possible
without the approval of Mr. Rogers, Dr. Barker, Alta-Berkeley L.P. II, Brantley
Venture Partners II, L.P., S.R. One Limited and Capital Ventures International.
In addition, the Company's directors, executive officers and principal
stockholders and certain of their affiliates, as a group, have the ability to
influence the election of the Company's directors and most other stockholder
actions.

QUARTERLY OPERATING RESULTS AFFECTED BY MANY BUSINESS FACTORS.

     The Company has experienced fluctuations in quarterly results and is likely
to continue to experience such fluctuations.  Expense levels are based, in part,
on expectations of future revenues.  If revenue levels in a particular quarter
are less than expected, operating results will be affected adversely, which may
have an adverse impact on the market price of the Company's Common Stock.  A
variety of factors have an influence on the level of revenues and expenses in a
particular quarter.  These factors include specific economic conditions in the
pharmaceutical industry, the withdrawal or failure to grant requisite government
approvals, customer cancellations or delay of shipments, production delays,
exchange rate fluctuations, management decisions to commence or discontinue
product lines, the introduction of new products by the Company or its
competitors, the timing of research and development expenditures, and expenses
attendant to acquisitions, strategic alliances and the further development of
marketing and service capabilities.

                                      -18-
<PAGE>
 
                                USE OF PROCEEDS

     The Company will not receive any proceeds from the sale of Common Stock by
the Selling Stockholders in the offering. The Company will receive a maximum
aggregate amount of $6,832,000 assuming the exercise of all outstanding warrants
and options for which the resale of Common Stock is registered hereby.  No
assurances can be given by the Company as to the exercise of any of such
warrants or options.  Proceeds from the exercise of such warrants and options,
if any, are anticipated to be used for working capital purposes.

                                      -19-
<PAGE>
 
                             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 the Selling
Stockholders as of December 16, 1996, and the number of shares which may be
offered for resale pursuant to this Prospectus.  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 and the following table has
been prepared on the assumption that all shares of Common Stock under this
Prospectus will be sold.

<TABLE>
<CAPTION>
                                Shares Beneficially                                                                              
                                  Owned Prior to                                                                                 
                                  Offering(1)(2)                 Shares Being                       Shares Beneficially Owned
                                                                   Offered                              After Offering(3)        

            Name                     Number                         Number                     Number               Percentage(4)
            ----                     ------                         ------                     ------               -------------
<S>                             <C>                          <C>                              <C>                   <C>           
Russell E. Teasdale (5)             220,000                        220,000                          0                       0

Mark G.P. Saifer (5)(7)             195,000                        195,000                          0                       0

L. David Williams(5)                 55,000                         15,000                     40,000                       *

Marc A. Fisher(5)                    35,000                         35,000                          0                       0

Carol C. Golsch(5)                   20,000                         20,000                          0                       0

Carl Claassen(5)                      5,000                          5,000                          0                       0

Rima Agamian(5)                       2,500                          2,500                          0                       0

Ralph Somack(5)                      47,500                         47,500                          0                       0

Anna D. Barker(8)                   972,137                        876,138                     95,999                       *

H. Gerald Bidwell                    13,016                         13,016                          0                       0

Cascadia Pacific                     13,543                         13,543                          0                       0 
Management, Inc.                     

Daniel Cawley(9)                     11,993                          8,025                      3,968                       *

Terryl Dank(10)                      15,630                         11,369                      4,261                       *

Kari Henderson(11)                    5,293                          2,675                      2,618                       *

Debbie Heuvelhorst(12)                1,779                            351                      1,428                       *

Charles Martin(13)                   53,008                         18,057                     34,951                       *
</TABLE> 

                                      -20-
<PAGE>
 
<TABLE>
<CAPTION>                                                                                                                        
                                Shares Beneficially                                                                              
                                  Owned Prior to                 Shares Being                     Shares Beneficially Owned
                                  Offering(1)(2)                   Offered                            After Offering(3)         
                                                                
            Name                     Number                         Number                     Number               Percentage(4)
            ----                     ------                         ------                     ------               -------------
<S>                             <C>                          <C>                              <C>                   <C>           
Stephen H. Mastin(14)                 51,660                          50,160                      1,500                    *
                                                                                                                     
Paul Mueggler(15)                     37,611                          34,778                      2,833                    *
                                                                                                                     
Dennis Murray(16)                      8,879                           6,420                      2,459                    *
                                                                                                                     
Jon S. Pitcher(17) (18)               65,751                          21,625                     44,126                    *
                                                                                                                     
Harry Roberts(19)                      9,344                           9,344                          0                    0
                                                                                                                     
Ray R. Rogers(20)                    701,367                         585,368                    115,999                    *
                                                                                                                     
George Spencer as Trustee             36,116                          36,116                          0                    0 
 for Rogers' Trusts dated                                                                                            
 March 7, 1994(21)                                                                                                   
                                                                                                                     
Stacey L. Holden                      52,328                          52,328                          0                    0
                                                                                                                           
Richard R. Rogers                     52,327                          52,327                          0                    0
                                                                                                                           
Anthony Miadich(23)                    7,500                           7,500                          0                    0
                                                                                                                           
Oregon Resource and                   20,000                          20,000                          0                    0
 Technology Development                                                                                              
 Fund(25)                             
                                                                                                                     
Lynda Taylor(24)                      69,392                          28,758                     40,634                    *
                                                                                                                     
Innolion(26) (27)                    707,430                         738,331                          0                    0
                                                                                                                           
Alta-Berkeley L.P. II(27)(28)        793,698                         838,712                          0                    0
                                                                                                                           
Sofinnova S.A. (27)(29)              237,696                         251,855                          0                    0
                                                                                                                           
Sofinnova Capital FCPR(27)           356,634                         377,872                          0                    0
 (30)                                                                                                                      
                                                                                                                           
Finovelec(27) (31)                   609,326                         644,453                          0                    0
                                                                                                                           
Hemera II & Cie                      132,630                         132,630                          0                    0
                                                                                                                           
Euroventures Germany C.V.             34,212                          34,212                          0                    0
</TABLE> 

                                      -21-
<PAGE>
 
<TABLE>
<CAPTION>                                                                                                                         
                                Shares Beneficially                                                                               
                                  Owned Prior to                 Shares Being                      Shares Beneficially Owned 
                                  Offering(1)(2)                   Offered                              After Offering(3)          
                                                               
            Name                     Number                         Number                     Number               Percentage(4) 
            ----                     ------                         ------                     ------               ------------- 
<S>                             <C>                          <C>                              <C>                   <C>            
Chimtex S.A.                           27,117                       27,117                           0                       0
                                                                                           
Finbiotec SPA                          31,785                       31,785                           0                       0
                                                                                           
Sumaru S.r.1                           21,895                       21,895                           0                       0
                                                                                           
Sea Farming S.r.1                      21,895                       21,895                           0                       0
                                                                                           
Jean Chaudiere(32)                    119,499                      119,499                           0                       0
                                                                                           
Christian Manuel                       76,864                       76,864                           0                       0
                                                                                           
Estate of Pr. A. Crastes de            13,362                       13,362                           0                       0
 Paulet(33)                                                                                
                                                                                           
Andre Capron                              762                          762                           0                       0
                                                                                           
Michel Rigaud(34)                      13,366                       13,366                           0                       0
                                                                                           
Catherine Rice Evans                      754                          754                           0                       0
                                                                                           
Bernard Jacotot                           754                          754                           0                       0
                                                                                           
Yves Grosgogeat                           754                          754                           0                       0
                                                                                           
Jean-Claude Yadan(55)                  66,715                       36,138                      30,577             *
                                                                                           
Henry-Michel Bouillet                     670                          670                           0                       0
                                                                                           
Andre Galli                               503                          503                           0                       0
                                                                                           
Jacques Emerit                            503                          503                           0                       0
                                                                                           
Marc Lange                                503                          503                           0                       0
                                                                                           
John B. Hawken(35)                     24,231                       24,231                           0                       0
                                                                                           
Marc Moutet(36)                        51,397                       29,784                      21,613             *
                                                                                           
Irene Erdelmeier                       24,911                       24,911                           0                       0
                                                                                           
Bailey & Co.(37)                      208,395                      208,395                           0                       0
</TABLE> 

                                      -22-
<PAGE>
 
<TABLE>
<CAPTION>                                                                                                                         
                                Shares Beneficially                                                                               
                                  Owned Prior to                 Shares Being                      Shares Beneficially Owned
                                  Offering(1)(2)                   Offered                              After Offering(3)          
                                                                
            Name                     Number                         Number                     Number               Percentage(4) 
            ----                     ------                         ------                     ------               ------------- 
<S>                                <C>                          <C>                            <C>                  <C>           
Brantley Venture Partners             764,893                       764,893                         0                       0
 II, L.P. (38)                      

S.R. One, Limited (39)              1,481,868                     2,233,710                         0                       0

Ohio State University                  87,131                        87,131                         0                       0
Research Foundation

William B. Weglicki                    72,610                        72,610                         0                       0

Donald T. Witiak                       53,005                        53,005                         0                       0
                                                                                             
Bruce Freeman                          21,783                        21,783                         0                       0
                                                                                             
Pierre L. Triozzi                       4,357                         4,357                         0                       0
                                                                                             
Dennis R. Feller                        2,904                         2,904                         0                       0
                                                                                             
Cynthia Brogan                          2,179                         2,179                         0                       0
                                                                                             
John Zemniak(40)                       80,942                        72,610                     8,332                       *
                                                                                             
Robert Johnson                         14,522                        14,522                         0                       0
                                                                                             
Ronald Borchardt                        5,809                         5,809                         0                       0
                                                                                             
Allen Hopper                            3,630                         3,630                         0                       0
                                                                                             
Sanctus Spiritus Antilles             150,258                       150,258                         0                       0
N.V.(50)                                                                                     
                                                                                             
Banque Nationale de Paris              49,858                        49,858                         0                       0
 (Luxembourg) S.A.(41)                                                                       
                                                                                             
Marc Alexandre(41)                     49,858                        49,858                         0                       0
                                                                                             
Bernard Herodin(41)                    49,858                        49,858                         0                       0
                                                                                             
S. Czigler(41)                         49,858                        49,858                         0                       0
                                                                                             
M. Kraland-Klein(41)                   49,858                        49,858                         0                       0
                                                                                             
R. Marshall(41)                        49,858                        49,858                         0                       0
                                                                                             
Van Geest Beheer B.V.(41)              49,858                        49,858                         0                       0
</TABLE> 

                                      -23-
<PAGE>
 
<TABLE>
<CAPTION>                                                                                                                         
                                Shares Beneficially                                                                               
                                  Owned Prior to                 Shares Being                      Shares Beneficially Owned
                                  Offering(1)(2)                   Offered                              After Offering(3)          
                                                                
            Name                     Number                         Number                     Number               Percentage(4) 
            ----                     ------                         ------                     ------               ------------- 
<S>                                <C>                          <C>                            <C>                  <C>           
Van Geest(41)                        49,858                         49,858                       0                       0
                                                                                        
Montaigne Fund N.V. (41)             49,858                         49,858                       0                       0
                                                                                        
Legong Investments, N.V.(42)         99,717                         99,717                       0                       0
                                                                                        
Veer Palthe Voute(43)               199,434                        199,434                       0                       0
                                                                                        
Banque Industrielle et              149,575                        149,575                       0                       0
 Mobiliere Privee(44)                                                                   
                                                                                        
Tocqueville N.V.(44)                149,575                        149,575                       0                       0
                                                                                        
Masidu N.V.(42)                      99,717                         99,717                       0                       0
                                                                                        
Purling Holdings Limited(45)         39,578                         39,578                       0                       0
                                                                                        
C.S. Rennie(46)                      14,841                         14,841                       0                       0
                                                                                        
Marc Dumont(47)                      93,806                        111,189                       0                       0
                                                                                        
Legong Investments N.V.(47)         187,481                        222,222                       0                       0
                                                                                        
Rauch & Co. (47)                    243,726                        288,889                       0                       0
                                                                                        
Megapolis B.V.(47)                   23,434                         27,777                       0                       0
                                                                                        
BBL France                           60,001                         60,001                       0                       0
                                                                                        
Henri Brunesholz(47)                 12,186                         14,444                       0                       0
                                                                                        
Marc Rebagliati(47)                  56,057                         66,444                       0                       0
                                                                                        
Carlo Gillet(47)                     37,777                         44,778                       0                       0
                                                                                        
D.N.B. Fund Partners                 76,923                         76,923                       0                       0
                                                                                        
Sharon L. Carpenter, (47)            46,870                         55,555                       0                       0
 IRA Guarantee & Trust Co.,                                                             
 TTEE                                                                                   
                                                                                        
Deborah A.Y. Day, (47) IRA           93,741                        111,111                       0                       0
 Guarantee & Trust Co., TTEE
</TABLE> 

                                      -24-
<PAGE>
 
<TABLE>
<CAPTION>                                                                                                                         
                                Shares Beneficially                                                                               
                                  Owned Prior to                 Shares Being                      Shares Beneficially Owned 
                                  Offering(1)(2)                   Offered                              After Offering(3)          
                                                               
            Name                     Number                         Number                     Number               Percentage(4) 
            ----                     ------                         ------                     ------               ------------- 
<S>                                <C>                          <C>                            <C>                  <C>           
Guarantee & Trust Co.,(47)              46,870                      55,555                            0                       0
 TTEE FBO Sylvia E. Morio,                                                             
 IRA                                                                                   

Maxine T. Yakushijin,(47)               93,741                     111,111                            0                       0
 IRA Guarantee & Trust Co.,                                                            
 TTEE                                                                                  

Terrance Y. Yoshikawa,(47)             430,925                     222,222                      243,444                    1.77%
 IRA Guarantee & Trust Co.,                                                            
 TTEE                                                                                  

America Health Care Fund,               93,834                     111,222                            0                       0
 L.P. (47) (51)                                                                        

Capital Ventures                     3,249,010                   4,490,834                            0                       0
 International(48)                                                                     

Jackson Tufts Cole & Black,             35,000                      35,000                            0                       0
 LLP(49)                                                                               

Wasserstein Perella &                  225,000                     225,000                            0                       0
 Company, Inc.  (52)                                                                   

LaRocque Trading Group, LLC            240,405                     621,318                            0                       0
 (53)                                                                                  

IHAG Handelsbank (53)                  192,324                     497,054                            0                       0

Coutts & Co. AG (53)                   288,486                     745,582                            0                       0

Stella Pasternak (53)                   48,081                     124,264                            0                       0

Yaffa Almani (53)                       48,081                     124,264                            0                       0

OVDA Fund, Ltd. (53)                   240,405                     621,318                            0                       0

H.J. Meyers & Co., Inc. (54)           105,778                     105,778                            0                       0

   Total:                           16,573,927                  19,920,823                      694,742                    4.89%
                                    ==========                  ==========                      =======                    ====
</TABLE> 
*   less than 1% of the issued and outstanding Common Stock of the Company.

                                      -25-
<PAGE>
 
(1)  Unless otherwise indicated in the footnotes to this table, the persons and
     entities named in the table have sole voting and sole investment power with
     respect to all shares beneficially owned, subject to community property
     laws where applicable.  The shares in this table include an aggregate of
     5,075,073 shares of Common Stock registered on Registration Statement No.
     33-61087 on Form S-3 and an aggregate of 9,306,426 shares of Common Stock
     registered on Registration Statement No. 333-5921 on Form S-3.

(2)  As required by regulations of the Securities and Exchange Commission, the
     number of shares in the table includes shares which can be purchased within
     60 days.

(3)  Assumes the sale of all shares offered hereby.  As required by regulations
     of the Securities and Exchange Commission, each percentage reported in the
     table for these individuals is calculated as though shares which can be
     purchased within 60 days have been purchased by the respective person or
     group and are outstanding.

(4)  Applicable percentage of ownership is based on 13,790,736 shares of Common
     Stock outstanding on December 16, 1996.

(5)  Includes  with respect to the following persons, the following number of
     shares which may be acquired through the exercise of stock warrants:
     Russell E. Teasdale (220,000); Mark G.P. Saifer (195,000); L. David
     Williams (15,000); Mark Fisher (35,000); Carol Golsch (20,000); Carl
     Claassen (5,000); Rima Agamian (2,500); Ralph Somack (47,500).

(6)  This footnote was intentionally left out.

(7)  Mark Saifer resigned as an executive officer of the Company during 1995.

(8)  Anna Barker is a director of the Company and its President and Chief
     Executive Officer.  Figure in first column includes 93,999 shares which may
     be acquired by exercise of options.

(9)  Includes 3,968 shares which may be acquired on exercise of options.

(10) Includes 4,261 shares which may be acquired on exercise of options.

(11) Includes 2,618 shares which may be acquired on exercise of options.

(12) Includes 1,428 shares which may be acquired on exercise of options.

(13) Includes 30,951 shares which may be acquired on exercise of options.

(14) Includes 1,500 shares which may be acquired on exercise of options.

(15) Includes 1,500 shares which may be acquired on exercise of options.

(16) Includes 2,459 shares which may be acquired on exercise of options.

(17) Includes 44,126 shares which may be acquired on exercise of options.

(18) Jon Pitcher is the Company's Chief Financial Officer and Secretary.

(19) Includes 6,000 shares which may be acquired on exercise of options.

(20) Ray R. Rogers is a director and the Chairman of the Board of Directors of
     the Company.  Figure in first column includes 10,000 shares owned by his
     individual retirement account, as to which Rogers exercises voting and
     investment power, and excludes 36,116 shares owned by an irrevocable trust
     for the benefit of his children.  George C. Spencer is the trustee under
     such irrevocable trust.  George C. Spencer is a partner of Tonkon, Torp,
     Galen, Marmaduke & Booth, a law firm which represents the Company.  Figure
     in first column also includes 98,999 shares which may be acquired by
     exercise of options.

                                      -26-
<PAGE>
 
(21)  See Note (20) above.

(22)  Intentionally omitted.

(23) Includes 7,500 shares which may be acquired on exercise of options.

(24) Includes 40,634 shares which may be acquired on exercise of options.

(25) Includes 20,000 shares which may be acquired on exercise of options.

(26) Includes 18,424 shares which may be acquired on exercise of options.

(27) The number in the first column in each case includes the number of shares
     of Common Stock which may be acquired by the holder of Series C Preferred
     Stock currently (within 60 days), as follows:  Innolion (166,760 shares),
     Alta-Berkeley L.P. II (242,924 shares), Sofinova S.A. (76,408 shares),
     Sofinova Capital FCPR (114,613 shares) and Finovelec (189,564 shares).  The
     number in the second column in each case includes the maximum number of
     shares which may be issued pursuant to the terms of the Company's Series C
     Preferred Stock based on the adjustable conversion price of the Series C
     Preferred (see footnote 47), as follows: Innolion (197,661 shares), Alta-
     Berkeley L.P. II (287,938 shares), Sofinova S.A. (90,567 shares), Sofinova
     Capital FCPR (135,851 shares) and Finovelec (224,691 shares).  The
     foregoing holders acquired the foregoing shares of Series C Preferred Stock
     in exchange for cancellation of promissory notes.

(28) Includes 16,452 shares which may be acquired on exercise of options.

(29) Includes 4,792 shares which may be acquired on exercise of options.

(30) Includes 7,184 shares which may be acquired on exercise of options.

(31) Includes  2,786 shares which may be acquired on exercise of options.

(32) Jean Chaudiere resigned as an executive officer of the Company during 1995.

(33) Includes 5,963 shares which may be acquired upon exercise of options.

(34) Includes 5,963 shares which may be acquired upon exercise of options.

(35) Includes 23,854 shares which may be acquired on exercise of options.

(36) Includes 21,613 shares which may be acquired on exercise of options.

(37) Includes 122,763 shares which may be acquired on exercise of warrants
     issued in connection with the sale of Common Stock, and 85,632 shares which
     may be acquired on exercise of warrants issued in connection with the sale
     of certain shares of Series C Preferred Stock.

(38) Includes 214,194 shares issuable upon conversion of Series B Preferred
     Stock.

(39) Includes 428,389 shares issuable upon conversion of Series B Preferred
     Stock, 1,105,824 shares issuable upon conversion of Secured Convertible
     Term Notes (the "Notes"), an aggregate of 150,000 shares issuable upon
     exercise of warrants issued in connection with such Notes, and an aggregate
     of 75,000 shares issuable upon exercise of warrants issuable pursuant to
     such Notes.  The Notes entitle the holder thereof to convert the Notes into
     shares of the Company's Common Stock at a conversion price which is the
     lesser of (i) eighty percent (80%) of the average closing bid prices of the
     Common Stock for the five consecutive trading days ended one trading day
     prior to the date the required conversion notice is sent to the Company,
     and (ii) the "Fixed Conversion Price."  For the period of 180 days
     following the issuance of the Notes, i.e., through April 8, 1997, the Fixed
                                          ----
     Conversion Price is $1.4125.  The Fixed Conversion Price is subject to
     reduction in the event that the Company issues Common Stock or securities
     convertible or exercisable for Common Stock for an amount less than the
     Fixed Conversion Price.  The Fixed Conversion Price is further adjustible
     (by decreasing but not increasing the Fixed Conversion Price) beginning
     April 9, 1997 and through October 

                                      -27-
<PAGE>
 
     11, 1997 by resetting such Fixed Conversion Price at each 30 day
     anniversary of April 9, 1997 to the price equal to the average closing bid
     prices of the Common Stock for the five consecutive trading days ended one
     trading day prior to such reset date. The maximum number of shares of
     Common Stock issuable upon conversion of the all of the Notes is 2,211,648
     shares (subject to adjustment upon the occurrence of certain dilutive
     events), which number of shares is included in the second column for each
     holder of such Notes. Additional shares of Common Stock may also be issued
     to, and sold hereunder by, the holder of a Note pursuant to the anti-
     dilution provisions contained in the Notes and the related warrants.
     Pursuant to the terms of the Notes, the holder thereof can only acquire
     shares of Common Stock upon conversion of the Notes to the extent that the
     number of shares of Common Stock thereby issuable, together with a number
     of shares of Common Stock then held by such holder and its affiliates (not
     including shares of Common Stock underlying unconverted principal amounts
     under the Notes and unexercised warrants) would not exceed 4.9% of the then
     outstanding Common Stock as determined in accordance with Section 13(d) of
     the Securities Exchange Act of 1934, as amended. Accordingly, the number of
     shares of Common Stock set forth herein to be sold by the holder of a Note
     may exceed the actual number of shares of Common Stock that it could own
     beneficially at any time through its ownership of such Note.

(40) Includes 8,332 shares which may be acquired on exercise of options.

(41) Includes 8,000 shares issuable upon exercise of warrants.

(42) Includes 16,000 shares issuable upon exercise of warrants.

(43) Includes 32,000 shares issuable upon exercise of warrants.

(44) Includes 24,000 shares issuable upon exercise of warrants.

(45) Includes 6,400 shares issuable upon exercise of warrants.

(46) Includes 2,400 shares issuable upon exercise of warrants.

(47) The number in the first column in each case constitutes the number of
     shares of Common Stock which may be acquired by the holder of Series C
     Preferred Stock currently (within 60 days).  The number in the second
     column in each case constitutes the maximum number of shares which may be
     issued pursuant to the terms of the Company's Series C Preferred Stock,
     which provide that if at any time after six (6) months following the final
     sale of Series C Preferred Stock (such sale having occurred on May 9,
     1996), any holder converts the Series C Preferred Stock, then the Series C
     Preferred Stock conversion price ("Series C Conversion Price") applicable
     to such holder's shares shall be the lesser of (i) $1.30, or (ii) the
     greater of (x) .90 or (y) 80% of the average closing bid price of the
     Common Stock for the fifteen (15) consecutive trading days ending on the
     date immediately preceding the date notice of conversion is given.  The
     Series C Conversion Price may only adjust once for each holder.

(48) (a) Number in first column includes a maximum of 2,874,171 shares of Common
     Stock issuable upon conversion of Series D Preferred Stock and exercise of
     warrants issued in connection with such Series D Preferred Stock. An
     aggregate of 810,126 shares of Common Stock are issuable on exercise of
     warrants. The Series D Preferred Stock entitles the holder thereof to
     receive a number of shares of Common Stock determined by dividing the
     stated value of the Series D Preferred Stock (i.e., $1,000 per share), plus
     a premium in the amount of 8% per annum of the stated value from the date
     of issuance (unless the Company chooses to redeem the shares otherwise
     issuable in respect of that premium), by a conversion price equal to the
     lesser of (i) $2.30 and (ii) a percentage (ranging from 100% on or before
     June 24, 1996 to 75% after July 3, 1996) of the average of the closing bid
     prices for shares of Common Stock for the five trading days immediately
     prior to conversion, subject to adjustment upon the occurrence of certain
     dilutive events. Under the applicable conversion formula, the number of
     shares of Common Stock currently issuable upon conversion of the Series D
     Preferred Stock would be higher if the market price of the Common Stock at
     the time of conversion decreases to a point at which the conversion price
     falls below the fixed conversion price. However, the maximum number of
     shares of Common Stock issuable upon conversion of the Series D Preferred
     Stock is 2,424,884 shares (subject to adjustment upon the occurrence of
     certain dilutive events). Additional shares of Common Stock may also be
     issued to, and sold hereunder by, Capital Ventures International pursuant
     to the anti-dilution provisions contained in the Series D Preferred Stock
     and warrants. Pursuant to the terms of the Series D Preferred Stock and the
     warrants issued in connection 

                                      -28-
<PAGE>
 
     therewith, the holder thereof can only acquire shares of Common Stock upon
     conversion of the Series D Preferred Stock and exercise of the warrants to
     the extent that the number of shares of Common Stock thereby issuable,
     together with a number of shares of Common Stock then held by such holder
     and its affiliates (not including shares of Common Stock underlying
     unconverted shares of Series D Preferred Stock and unexercised warrants)
     would not exceed 4.9% of the then outstanding Common Stock as determined in
     accordance with Section 13(d) of the Securities Exchange Act of 1934, as
     amended. Accordingly, the number of shares of Common Stock set forth herein
     to be sold by Capital Ventures International may exceed the actual number
     of shares of Common Stock that it could own beneficially at any time
     through its ownership of Series D Preferred Stock and such warrants.
     Effective October 21, 1996, 350 shares of Series D Preferred Stock were
     converted into an aggregate of 360,839 shares of Common Stock, leaving
     1,650 shares of Series D Preferred Stock outstanding.

     (b) Number in first column also includes 1,105,824 shares of Common Stock
     issuable upon conversion of Notes, 150,000 shares issuable upon exercise of
     warrants issued in connection with such Notes, and an aggregate of 75,000
     shares issuable upon exercise of warrants issuable pursuant to such Notes.
     The Notes entitle the holder thereof to convert the Notes into shares of
     the Company's Common Stock at a conversion price which is the lesser of (i)
     eighty percent (80%) of the average closing bid prices of the Common Stock
     for the five consecutive trading days ended one trading day prior to the
     date the required conversion notice is sent to the Company, and (ii) the
     "Fixed Conversion Price."  For the period of 180 days following the
     issuance of the Notes, i.e., through April 8, 1997, the conversion price is
                            ----
     $1.4125.  The Fixed Conversion Price is subject to reduction in the event
     that the Company issues Common Stock or securities convertible or
     exercisable for Common Stock for an amount less than the Fixed Conversion
     Price.  The Fixed Conversion Price is further adjustable (by decreasing but
     not increasing the Fixed Conversion Price) beginning April 9, 1997 and
     through October 11, 1997 by resetting such Fixed Conversion Price at each
     30 day anniversary of April 9, 1997 to the price equal to the average
     closing bid prices of the Common Stock for the five consecutive trading
     days ended one trading day prior to such reset date.  The maximum number of
     shares of Common Stock issuable upon conversion of the all of the Notes is
     2,211,648 shares (subject to adjustment upon the occurrence of certain
     dilutive events), which number of shares is included in the second column
     for each holder of such Notes.  Additional shares of Common Stock may also
     be issued to, and sold hereunder by, the holder of a Note pursuant to the
     anti-dilution provisions contained in the Notes and the related warrants.
     Pursuant to the terms of the Notes, the holder thereof can only acquire
     shares of Common Stock upon conversion of the Notes to the extent that the
     number of shares of Common Stock thereby issuable, together with a number
     of shares of Common Stock then held by such holder and its affiliates (not
     including shares of Common Stock underlying unconverted principal amounts
     under the Notes and unexercised warrants) would not exceed 4.9% of the then
     outstanding Common Stock as determined in accordance with Section 13(d) of
     the Securities Exchange Act of 1934, as amended.  Accordingly, the number
     of shares of Common Stock set forth herein to be sold by the holder of a
     Note may exceed the actual number of shares of Common Stock that it could
     own beneficially at any time through its ownership of such Note.

(49) Number in first column constitutes 35,000 shares which may be acquired on
     exercise of options.

(50) Includes 108,400 shares issuable upon exercise of warrants.

(51) America Health Care Fund, L.P. is a limited partnership of which James
     McCamant, a director of the Company, is the general partner.

(52) Includes 200,000 shares issuable upon exercise of warrants.

(53) Number in first column includes with respect to the following investors,
     the following number of shares of issued Common Stock and the following
     number of shares of Common Stock issuable upon conversion of Series E
     Preferred Stock (assuming the holders of such Series E Preferred Stock were
     to convert their shares for Common Stock as of December 13, 1996) (for
     purposes of this footnote (53), the "Conversion Shares"):  LaRocque Trading
     Group, LLC, 12,500 shares of Common Stock, 227,905 Conversion Shares; IHAG
     Handelsbank, 10,000 shares of Common Stock, 182,324 Conversion Shares;
     Coutts & CO AG, 15,000 shares of Common Stock, 273,486 Conversion Shares;
     Stella Pasternak, 2,500 shares of Common Stock, 45,581 Conversion Shares;
     Yaffa Almani, 2,500 shares of Common Stock, 45,581 Conversion Shares; and
     OVDA Fund, Ltd., 12,500 shares of Common Stock, 227,905 Conversion Shares.
     The Series E Preferred Stock entitles the holder thereof, after the earlier
     of (i) April 9, 1997 or (ii) 30 days following the closing of a public
     offering by the Company, to receive in exchange for its shares of Series E
     Preferred 

                                      -29-
<PAGE>
 
     Stock, a number of shares of Common Stock determined by dividing the stated
     value of the Series E Preferred Stock (i.e., $500 per share), by a
     conversion price equal to the lesser of (i) $2.00 and (ii) 75% of the
     average of the closing bid prices for shares of Common Stock for the five
     consecutive trading days ending one trading day prior to conversion,
     subject to adjustment upon the occurrence of certain dilutive events. Under
     the applicable conversion formula, the number of shares of Common Stock
     currently issuable upon conversion of the Series E Preferred Stock would be
     higher if the market price of the Common Stock at the time of conversion
     decreases to a point at which the conversion price falls below the fixed
     conversion price. However, the maximum number of shares of Common Stock
     issuable upon conversion of the Series E Preferred Stock plus the number of
     shares of Common Stock issued in connection with the Series E Preferred
     Stock (55,000 shares) is 2,733,799 shares (subject to adjustment upon the
     occurrence of certain dilutive events). Additional shares of Common Stock
     may also be issued to, and sold hereunder by, the holder pursuant to the
     anti-dilution provisions contained in the Series E Preferred Stock.
     Pursuant to the terms of the Series E Preferred Stock, the holder thereof
     can only acquire shares of Common Stock upon conversion of the Series E
     Preferred Stock to the extent that the number of shares of Common Stock
     thereby issuable, together with a number of shares of Common Stock then
     held by such holder and its affiliates (not including shares of Common
     Stock underlying unconverted shares of Series E Preferred Stock) would not
     exceed 4.9% of the then outstanding Common Stock as determined in
     accordance with Section 13(d) of the Securities Exchange Act of 1934, as
     amended. Accordingly, the number of shares of Common Stock set forth herein
     to be sold by any holder of Series E Preferred Stock may exceed the actual
     number of shares of Common Stock that it could own beneficially at any time
     through its ownership of Series E Preferred Stock.

(54) Includes 105,778 shares issuable upon exercise of warrants.

(55) Includes 30,577 shares which may be acquired on exercise of options.

                                      -30-
<PAGE>
 
                             PLAN OF DISTRIBUTION

     The Company is registering or has registered the shares of Common Stock
offered by the Selling Stockholders hereunder in certain instances on a
voluntary basis and otherwise pursuant to (i) the terms of the offering of
convertible debentures with warrants concluded in December 1995, (ii)  the
Registration Rights Agreements entered into on September 7, 1994 with respect to
the acquisitions of Bioxytech S.A. and International BioClinical, Inc., (iii)
Registration Rights Agreements entered into on July 18, 1995 in connection with
the acquisition of Therox Pharmaceuticals, Inc. and the sale of Series B
Preferred Stock (the Restricted Registration Rights Agreements), (iv) the terms
of warrants dated March 13, 1987 through August 21, 1988, (v) engagement letters
providing for warrants for the Company's placement agent dated May 23, 1995 and
June 27, 1995, as amended, (vi) a contractual agreement to register the
underlying shares of Common Stock in connection with the offering and sale of
Series C Convertible Preferred Stock concluded May 9, 1996, (vii) the
Registration Rights Agreement entered into on May 15, 1996 with respect to the
Common Stock underlying the Series D Convertible Preferred Stock and warrants to
purchase Common Stock sold in connection with such Series D Convertible
Preferred Stock, (viii) the Registration Rights Agreements entered into on
October 11, 1996 with respect to the Common Stock underlying the Secured
Convertible Term Notes and warrants to purchase Common Stock sold in connection
with such Secured Convertible Term Notes, (ix) the Registration Rights
Agreements entered into on and about December 10, 1996 with respect to the
Common Stock sold in the December 1996 private placement of the Company and the
Common Stock underlying the Series E Preferred Stock sold by the Company and (x)
a letter agreement entered into December 10, 1996 with respect to the placement
agent's warrant in connection with such offering in December 1996.

     Pursuant to the terms of the Restricted Registration Rights Agreements, no
Selling Stockholders party to the Restricted Registration Rights Agreements may
sell during (i) any three month period while this Registration Statement is in
effect, a number of shares of Common Stock which are Registrable Securities (as
defined in the Restricted Registration Rights Agreements) that is greater than
one percent (1%) of the number of issued and outstanding Common Stock at such
time and (ii) any single month while this Registration Statement is in effect, a
number of shares of Registrable Securities that is more than one-third (1/3) of
one percent (1%) of the number of issued and outstanding Common Stock at such
time.  Within ten (10) days following the last day of any month in which a
Selling Stockholder party to the Restricted Registration Rights Agreements sells
Registrable Securities, any such Selling Stockholder must notify the Company of
the number of shares of Registrable Securities sold by such Selling Stockholder.

     The Restricted Registration Rights Agreements also provide that if the
Company proposes to register any of its stock or other securities under the
Securities Act in connection with an underwritten public offering of such
securities solely for cash, the Company shall, at such time, promptly give each
Selling Stockholder party to the Restricted Registration Rights Agreements
written notice of such registration, and in connection with such public
offering, the Selling Stockholders party to the Restricted Registration Rights
Agreements have agreed not to sell any of the Registrable Securities during such
customary lock-up period requested by the Companys underwriters who are
underwriting such public offering.  The Selling Stockholders party to the
Restricted Registration Rights Agreements shall have no right to participate in
any such public offering.

                                      -31-
<PAGE>
 
     Subject to the foregoing restrictions with respect to those Selling
Stockholders which are parties to the Restricted Registration Rights Agreements,
the shares of Common Stock offered hereunder may be sold from time to time by
the Selling Stockholders, or by pledgees, donees, transferees or other
successors in interest.  Such sales may be made on the Nasdaq National Market or
in the over-the-counter market or otherwise at prices and on terms then
prevailing or related to the then current market price, or in negotiated
transactions.  The shares of Common Stock may be sold to or through one or more
broker-dealers, acting as agent or principal in underwritten offerings, block
trades, agency placements, short sales, exchange distributions, brokerage
transactions or otherwise, or in any combination of the foregoing.

     The Company is bearing the costs relating to the registration of the shares
of Common Stock offered hereby.  In connection with any transaction involving
the Common Stock, broker-dealers or others may receive from the Selling
Stockholders, and may in turn pay to other broker-dealers or others,
compensation in the form of commissions, discounts or concessions in amounts to
be negotiated at the time.  Such compensation shall be paid by the Selling
Stockholders.  Broker-dealers and any other persons participating in a
distribution of the Common Stock may be deemed to be underwriters within the
meaning of the Act in connection with such distribution, and any such
commissions, discounts or concessions may be deemed to be underwriting discounts
or commissions under the Act.

     Any or all of the sales or other transactions involving the Common Stock
described above, whether effected by the Selling Stockholders, any broker-dealer
or others, may be made pursuant to this Prospectus.  In addition, any shares of
Common Stock that qualify for sale pursuant to Rule 144 under the Act may be
sold under Rule 144 rather than pursuant to this Prospectus.

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

     The Company and certain of the Selling Stockholders have agreed, and
hereafter may further agree, to indemnify certain persons, including certain of
the Selling Stockholders, persons controlling certain Selling Stockholders and
the underwriters for such Selling Stockholders, broker-dealers or others,
against certain liabilities in connection with any offering of the Common Stock,
including liabilities arising under the Act.

                                 LEGAL MATTERS

     The validity of the Common Stock offered hereby will be passed upon for the
Company by Jackson Tufts Cole & Black, LLP, San Jose, California.  Jackson Tufts
Cole & Black, LLP is the beneficial owner of  options to purchase 35,000 shares
of the Common Stock of the Company.

                                    EXPERTS

     The financial statements and schedules incorporated by reference in this
Prospectus from the Companys Annual Report on Form 10-K for the fiscal year
ended December 31, 1995, as amended, have been audited by Deloitte & Touche LLP,
independent auditors, as stated in their 

                                      -32-
<PAGE>
 
report which is incorporated herein by reference (which report expresses an
unqualified opinion and includes an explanatory paragraph referring to the
Company's ability to continue as a going concern), and the financial statements
of Therox Pharmaceuticals, Inc. incorporated by reference in this Prospectus
from the Company's Current Report on Form 8-K/A filed with the Commission on
September 29, 1995, have been audited by Barna, Kowall & Company. Such financial
statements and schedules have been so incorporated in reliance upon the reports
of such firms given upon their authority as experts in accounting and auditing.

                                INDEMNIFICATION

     Insofar as indemnification for liabilities arising under the Act may be
permitted to directors, officers and controlling persons of the Company, the
Company has been advised that in the opinion of the Commission such
indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable.  In the event that a claim for indemnification against
such liabilities (other than the payment by the Company of expenses incurred or
paid by a director, officer or controlling person of the Company 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 Company 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 Act and will be governed by the final adjudication of
such issue.

                                      -33-
<PAGE>
 
                                    PART II

                    INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

     The following table sets forth all expenses, other than the underwriting
discounts and commissions, payable by the Registrant in connection with the sale
of the Common Stock being registered.  All the amounts shown are estimates
except for the registration fee.

<TABLE>
<S>                                                       <C>
            Registration fee                              $ 2,322
            Blue sky qualification fees and expenses        5,000
            Printing and engraving expenses                 5,000
            Legal fees and expenses                        25,000
            Accounting fees and expenses                    5,000
            Miscellaneous                                 $ 5,000
                                                          -------
                                                          $47,322
                                                          =======
</TABLE>

ITEM 15.  INDEMNIFICATION OF OFFICERS AND DIRECTORS.

     The Company has the power, pursuant to Section 102(7) of the Delaware
General Corporation Law, to limit the liability of directors of the Company for
certain breaches of fiduciary duty and, pursuant to Section 145 of the Delaware
General Corporation Law, to indemnify its officers and directors and other
persons for certain acts.

     The Companys Restated Certificate of Incorporation includes the following
provisions:

     "A director of the Company shall not be personally liable to the company or
     its stockholders for monetary damages for breach of fiduciary duty as a
     director, except for liability (i) for any breach of the directors duty of
     loyalty to the Company or its stockholders, (ii) for acts or omissions not
     in good faith or which involve intentional misconduct or a knowing
     violation of law, (iii) under Section 174 of the Delaware General
     Corporation Law or (iv) for any transaction from which the director derived
     an improper personal benefit.  If the Delaware General Corporation Law is
     amended to authorize corporate action further eliminating or limiting the
     personal liability of directors, then the liability of a director of the
     Company shall be eliminated or limited to the fullest extent permitted by
     the Delaware General Corporation Law, as so amended.  Any repeal or
     modification of this Article by the stockholders of the Company shall not
     adversely affect any right or protection of a director of the Company
     existing at the time of such repeal or modification."

     The Company shall indemnify any and all persons whom it has the power to
     indemnify pursuant to the General Corporation Law of Delaware against any
     and all expenses, judgments, fines, amounts paid in settlement, and any
     other liabilities to the fullest extent permitted by such law and may at
     the discretion of the Board of Directors, purchase and maintain insurance,
     at its expense, to protect itself and such persons against any expense,
     judgment, fine, amount paid in settlement or 

                                      -34-
<PAGE>
 
     other liability, whether or not the Company would have the power to so
     indemnify such person under the General Corporation Law of Delaware.

     The Company 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 directors duty of loyalty to the Company
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.

     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.

     Section 145 of the Delaware General Corporation Law authorizes a court to
award, or a corporations board of directors to grant indemnification to
directors and officers in terms sufficiently broad to permit such
indemnification under certain circumstances for liabilities (including
reimbursement for expenses incurred) arising under the Securities Act.

     Article III of the Companys Bylaws provides that the Company, by action of
the Board of Directors, may, to the fullest extent permitted by the General
Corporation Law of Delaware, indemnify any and all persons who it shall have
power to indemnify against any and all of the expenses, liabilities or other
matters.

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

ITEM 16.  EXHIBITS

        (a)  Exhibits.

<TABLE>
<CAPTION>
         EXHIBIT
         NUMBER
         -------
<S>                    <C>
         5.1           Opinion of Jackson Tufts Cole & Black, LLP.
                       
         23.1          Consent of Deloitte & Touche LLP.
                       
         23.2          Consent of Jackson Tufts Cole & Black, LLP.
                       Reference is made to Exhibit 5.1.
                       
         23.3          Consent of Barna, Kowall & Company.

</TABLE> 

                                      -35-
<PAGE>
 
ITEM 17.  UNDERTAKINGS

     Insofar as indemnification for liabilities arising under the Act may be
permitted to directors, officers and controlling persons of the Company pursuant
to provisions described in Item 15, or otherwise, the Company has been advised
that in the opinion of the Commission such indemnification is against public
policy as expressed in the Act and is, therefore, unenforceable.  In the event
that a claim for indemnification against such liabilities (other than the
payment by the Company of expenses incurred or paid by a director, officer or
controlling person of the Company 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 Company 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 Act and will
be governed by the final adjudication of such issue.

     The undersigned Company hereby undertakes:

     (1) To file, during any period in which offers or sales are being made, a
post-effective amendment to this registration statement 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.

     (2) That, for the purpose of determining any liability under the 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.

     (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.

     (4) That, for purposes of determining any liability under the Act, each
filing of the Companys annual report pursuant to Section 13(a) or 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plans
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.

     (5) That, for purposes of determining any liability under the 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 Company pursuant to Rule 424(b)(1) or (4) or 497(h)
under the Act shall be deemed to be part of this Registration Statement as of
the time it was declared effective.

     (6) To deliver or cause to be delivered with the Prospectus, to each person
to whom the Prospectus is sent or given, the latest annual report to security
holders that is incorporated by reference in the Prospectus and furnished
pursuant to and meeting the requirements of Rule 14a-3 or Rule 14c-3 under the
Exchange Act; and, where interim financial information required to be presented
by Article 3 of Regulation S-X are not set forth in the Prospectus, to deliver,
or cause to be delivered to each person to whom the Prospectus is sent or given,
the latest quarterly report that is specifically incorporated by reference in
the Prospectus to provide such interim financial information.

                                      -36-
<PAGE>
 
                                  SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Company has
duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the city of Portland, State of
Oregon, on the 16th day of  December, 1996.

                                       OXIS INTERNATIONAL, INC.



                                       By:    /s/Anna D. Barker
                                           ---------------------
                                           Anna D. Barker, Ph.D.
                                           President and Chief Executive Officer
                                           (Principal Executive Officer)

     KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Ray R. Rogers and Anna D. Barker, or
either of them, as his true and lawful attorneys-in-fact and agents with full
power of substitution and resubstitution, for him and in his name, place, and
stead, in any and full capacities, to sign any and all amendments (including
post-effective amendments) to this Registration Statement, 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 might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents, or any of
them, or their or his substitute or substitutes, may lawfully do or cause to be
done by virtue hereof.

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

<TABLE>
<CAPTION>
          SIGNATURE                         TITLE                     DATE
          ---------                         -----                     ----
<S>                             <C>                             <C>
/s/Anna D. Barker               Director; President and         December 16, 1996
- -----------------------------   Chief Executive Officer
Anna D. Barker                  (Principal Executive Officer)

/s/Jon S. Pitcher               Chief Financial Officer         December 16, 1996
- -----------------------------   and Secretary
Jon S. Pitcher                  (Principal Financial and
                                Accounting Officer)

/s/Ray R. Rogers                Director; Chairman of the       December 16, 1996
- -----------------------------   Board
Ray R. Rogers
</TABLE> 

                                      -37-
<PAGE>
 
<TABLE> 
<CAPTION> 

<S>                             <C>                             <C>
/s/Gerald D. Mayer              Director                        December 16, 1996
- -----------------------------
Gerald D. Mayer

/s/James McCamant               Director                        December 16, 1996
- -----------------------------
James McCamant

/s/Stuart Lang                  Director                        December 16, 1996
- -----------------------------
Stuart Lang

/s/David Needham                Director                        December 16, 1996
- -----------------------------
David Needham

/s/A.R. Sitaraman               Director                        December 16, 1996
- -----------------------------
A.R. Sitaraman

/s/Timothy G. Biro              Director                        December 16, 1996
- -----------------------------
Timothy G. Biro
</TABLE>

                                      -38-
<PAGE>
 
                               INDEX TO EXHIBITS

<TABLE>
<CAPTION>
 
           EXHIBIT                                              SEQUENTIAL
           NUMBER                    DESCRIPTION                 PAGE NO.
           -------                   -----------                ----------
           <S>           <C>                                    <C>
             5.1         Opinion of Jackson Tufts Cole &             40
                         Black, LLP                                  
                                                                     
            23.1         Consent of Deloitte & Touche LLP            41
                                                                     
            23.2         Consent of Jackson Tufts Cole &             
                         Black, LLP.  Reference is made to           
                         Exhibit 5.1                                 
                                                                     
            23.3         Consent of Barna, Kowall & Company          42
- --------------------------------------------------------------------------
</TABLE>

                                      -39-

<PAGE>
 
                                  EXHIBIT 5.1

                  OPINION OF JACKSON TUFTS COLE & BLACK, LLP


                               December 16, 1996


OXIS International, Inc.
6040 N. Cutter Circle
Suite 317
Portland, Oregon  97217-3935

Ladies and Gentlemen:

     With reference to the Registration Statement on Form S-3 (the "Registration
Statement") to be filed by OXIS International, Inc., a Delaware corporation (the
"Company"), with the Securities and Exchange Commission under the Securities Act
of 1933, as amended, relating to 5,701,225 shares of Common Stock, par value
$.50 per share, of the Company (the "Common Stock"), it is our opinion that with
respect to (i) the shares of Common Stock to be offered and sold pursuant to the
Registration Statement which are issued and outstanding on the date hereof, such
shares of Common Stock are legally issued, fully paid and nonassessable and (ii)
the shares of Common Stock to be offered and sold pursuant to the Registration
Statement which are issuable pursuant to the terms of Series E Preferred Stock,
secured convertible term notes or warrants, such shares of Common Stock, when
issued and sold in accordance with the applicable Series E Preferred Stock,
secured convertible term notes or warrants, will be legally issued, fully paid
and nonassessable.

     We hereby consent to the filing of this opinion with the Securities and
Exchange Commission as Exhibit 5.1 to the Registration Statement.

                              Very truly yours,

                              Jackson Tufts Cole & Black, LLP

                                     -40-

<PAGE>
 
                                 EXHIBIT 23.1

                       CONSENT OF DELOITTE & TOUCHE LLP



INDEPENDENT AUDITORS' CONSENT


We consent to the incorporation by reference in this Registration Statement of
OXIS International, Inc. (formerly DDI Pharmaceuticals, Inc.) and subsidiaries
on Form S-3, of our report dated March 7, 1996, which included an explanatory
paragraph relating to the Company's ability to continue as a going concern,
appearing in the Annual Report on Form 10-K of OXIS International, Inc. for the
year ended December 31, 1995, as amended by Form 10-K/A, and to the reference to
us under the heading "Experts" in the Prospectus, which is part of this
Registration Statement.


DELOITTE & TOUCHE LLP
Portland, Oregon
December 16, 1996

                                     -41-

<PAGE>
 
                                 EXHIBIT 23.3

                      CONSENT OF BARNA, KOWALL & COMPANY


INDEPENDENT AUDITORS' CONSENT


We consent to the incorporation by reference in this Registration Statement of
OXIS International, Inc. (formerly DDI Pharmaceuticals, Inc.) and subsidiaries
on Form S-3, of our report dated June 22, 1995, on the financial statements of
Therox Pharmaceuticals, Inc. appearing in the Form 8-K/A Current Report of OXIS
International, Inc. dated September 28, 1995, and to the reference to us under
the heading "Experts" in the Prospectus, which is part of this Registration
Statement.


BARNA, KOWALL & COMPANY
December 16, 1996
Independence, Ohio

                                     -42-


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