DYNAGEN INC
S-3/A, 1997-09-11
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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    As filed with the Securities and Exchange Commission on September 11, 1997
                                                     Registration No. 333-33321
================================================================================
    


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                          -----------------------------


   
                               AMENDMENT NO. 1 TO
    

               
                                    FORM S-3

                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

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

          DELAWARE                                               2830       
(State or other jurisdiction of                     Primary Standard Industrial 
 incorporation or organization)                      Classification Code Number)

                                    04-3029787                   
                               (I.R.S. Employer   
                               Identification No.) 




                                 99 Erie Street
                         Cambridge, Massachusetts 02139
                                 (617) 491-2527

          (Address, including zip code, and telephone number, including
             area code, of Registrant's principal executive offices)


                           DR. INDU A. MUNI, President
                                  DynaGen, Inc.
                                 99 Erie Street
                         Cambridge, Massachusetts 02139
                                 (617) 491-2527

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

                                   Copies to:

                              JOHN M. HESSION, ESQ.
                         Testa, Hurwitz & Thibeault, LLP
                                High Street Tower
                                 125 High Street
                           Boston, Massachusetts 02110
                                 (617) 248-7000





         Approximate  date of  commencement  of proposed sale to the public:  As
soon as practicable after this Registration Statement becomes effective.

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

         If any of the  securities  being  registered  on  this  Form  are to be
offered  on a  delayed  or  continuous  basis  pursuant  to Rule 415  under  the
Securities Act of 1933,  other than  securities  offered only in connection with
dividend or interest reinvestment plans, check the following box. [X]

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

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

         If delivery of the  prospectus  is expected to be made pursuant to Rule
434, please check the following. [ ]

         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 Section 8(a), may
determine.

         In accordance with Rule 416 under the Securities Act, this Registration
Statement  also covers such  indeterminate  number of  additional  shares of the
Registrant's  Common  Stock,  $.01  par  value,  as  may  become  issuable  upon
conversion  of the  Registrant's  Series A Preferred  Stock,  $.01 par value per
share (the "Series A Stock"), or the Registrant's Series B Preferred Stock, $.01
par value per share (the "Series B Stock"),  to prevent dilution  resulting from
stock splits, stock dividends or similar transactions or by reason of changes in
conversion  price of the Series A Stock or Series B Stock in accordance with the
terms thereof.



                                      -2-




                         CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
=================================================================================================================

                                                          Proposed              Proposed
          Title of                                        Maximum               Maximum
         Securities                   Amount              Offering             Aggregate               Amount of
           to be                      to be              Price Per              Offering             Registration
         Registered                 Registered             Share                 Price                    Fee
- ------------------------------------------------------------------------------------------------------------------

<S>                            <C>                     <C>                  <C>                        <C>
   
      Common Stock,            
      $.01 par value         15,303,000 shares(1)       $0.41(2)            $6,274,230(2)            $1,901(3)
    



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

(1)      Includes a presently  indeterminate number of shares issued or issuable
         upon conversion of the Series A Stock and Series B Stock as such number
         of shares may be adjusted in accordance with Rule 416.

   
(2)      The price of $0.41 per share, which is the average of the bid and asked
         prices  reported on the Nasdaq SmallCap Market on September 9, 1997, is
         set forth solely for purposes of calculating the filing fee pursuant to
         Rule 457(c).

(3)      $2,774 previously paid on August 8, 1997, no additional fee required.

    


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





PROSPECTUS
- ----------

                                  DYNAGEN, INC.


   
                       15,303,000 Shares of Common Stock
                                ($.01 par value)

         All of the shares of Common  Stock,  par value $.01 per share  ("Common
Stock"),  of DynaGen,  Inc.  ("DynaGen" or the  "Company")  offered  hereby (the
"Shares") will be sold from time to time by certain  stockholders of the Company
(the "Selling Stockholders").  The Shares consist of (i) up to 12,100,000 shares
of Common Stock issuable upon the conversion of the Company's Series A Preferred
Stock, $.01 par value per share (the "Series A Stock"), or that the Company may,
at its option,  issue in payment of dividends on the Series A Stock,  (ii) up to
1,500,000  shares of Common Stock  issuable  upon  conversion  of the  Company's
Series B Preferred  Stock,  $.01 par value per share (the "Series B Stock"),  or
that the Company may, at its option, issue in payment of dividends on the Series
B Stock, (iii) 328,000 shares of Common Stock issuable upon exercise of warrants
issued to the  holders of Series A Stock  (the  "Warrants")  and (iv)  1,375,000
shares of Common  Stock  issued to certain  Selling  Stockholders  (the  "Common
Shares").  The  Series  A  Stock  and the  Series  B Stock  is  referred  herein
collectively  as the  "Preferred  Stock." In accordance  with Rule 416 under the
Securities Act of 1933, as amended (the "Securities  Act"), this prospectus also
relates to an additional indeterminate number of shares issuable upon conversion
of the Preferred Stock to prevent  dilution  resulting from stock splits,  stock
dividends  or similar  transactions  or by reason of  changes in the  conversion
prices of the Preferred  Stock. The Company will not receive any of the proceeds
from the sale of the Shares offered hereby. All brokerage  commissions and other
similar  expenses  incurred  by the  Selling  Stockholders  will be borne by the
Selling Stockholders. Other expenses of the offering, estimated at $55,000, will
be borne by the Company.
    

         The sale of the Shares by the Selling Stockholders may be effected from
time to time in one or more transactions  (which may involve block transactions)
on the Nasdaq SmallCap Market (the "Nasdaq") or in the over-the-counter  market,
in negotiated transactions or by a combination of such methods of sale, at fixed
prices,  at market prices  prevailing at the time of the sale, at prices related
to  the  prevailing  market  prices  or  at  negotiated   prices.   The  Selling
Stockholders  may  effect  such   transactions  with  or  through  one  or  more
broker-dealers,  which may act as agent or principal.  The Selling  Stockholders
and/or  any   broker-dealer   effecting  the  sales  may  be  deemed  to  be  an
"underwriter" within the meaning of Section 2(11) of the Securities Act, and any
commissions received by the broker-dealer and any profit on the resale of shares
as principal may be deemed to be underwriting  discounts and  commissions  under
the  Securities  Act. The Selling  Stockholders  may  transfer  the Shares,  the
Preferred Stock or the Warrants to other persons who may, in turn, resell Shares
in the manner described above. Additionally, the Selling Stockholders may pledge
or make gifts of the Shares,  and the Shares may also be sold by the pledgees or
transferees.  The Selling  Stockholders may also transfer the Shares pursuant to
Rule 144 under the Securities Act, whether or not the Registration  Statement of
which  this  Prospectus  forms  a part is  effective  at the  time  of any  such
transfer.  The Company has agreed to indemnify the Selling  Stockholders against
certain liabilities, including certain liabilities under the Securities Act, and
to the extent







any  indemnification  by an indemnifying  party is prohibited or limited by law,
the  Company  has agreed to make the maximum  contribution  with  respect to any
amounts  for which it would  otherwise  be  liable  under  such  indemnification
provision to the fullest extent permitted by law. See "Plan of Distribution."

   
         As of September 9, 1997,  the  authorized  capital stock of the Company
consisted of (i) 75,000,000  shares of Common Stock, of which 33,277,625  shares
were issued and outstanding, and (ii) 10,000,000 shares of preferred stock, $.01
par value per share,  of which (A) 50,000 shares have been  designated  Series A
Stock, of which 45,950 shares were issued and outstanding,  and (B) 7,500 shares
have  been  designated  as  Series  B  Stock,  all  of  which  were  issued  and
outstanding.  As of such  date,  the  Company  had  reserved  for  issuance  (A)
14,360,000  shares of Common Stock for issuance upon  conversion of the Series A
Stock,  (B) 2,344,000 shares of Common Stock for issuance upon conversion of the
Series B Stock,  (C) 367,600  shares for issuance upon exercise of the Warrants,
and (D) no more  than  22,504,700  shares  of Common  Stock  for  issuance  upon
exercise of other outstanding options, warrants, convertible preferred stock and
convertible note.

         The Common  Stock is  currently  traded on the Nasdaq  SmallCap  Market
under the symbol "DYGN" and on the Boston Stock Exchange under the symbol "DYG."
On September 9 , 1997, the closing bid price of the Common Stock, as reported by
the Nasdaq SmallCap Market, was $0.38 per share.
    

         THE SECURITIES OFFERED HEREBY INVOLVE A HIGH DEGREE OF RISK AND
         SUBSTANTIAL DILUTION TO THE PUBLIC INVESTOR. SEE "RISK FACTORS"
                                 AND "DILUTION."
                          ----------------------------

          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.

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



   
                The date of this Prospectus is September 11, 1997
    



                                      -2-



                              AVAILABLE INFORMATION

         DynaGen, Inc., a Delaware corporation,  is subject to the informational
requirements  of the Securities  Exchange Act of 1934, as amended (the "Exchange
Act"), and in accordance therewith, files reports and other information with the
Securities  and  Exchange  Commission  (the  "Commission").  Reports  and  other
information   filed  by  the  Company  with  the  Commission   pursuant  to  the
informational  requirements  of the Exchange Act may be inspected  and copied at
the public reference facilities maintained by the Commission at Judiciary Plaza,
Room 1024, 450 Fifth Street, N.W., Washington,  D.C. 20549, and at the following
Regional  Offices of the Commission:  Seven World Trade Center,  Suite 1300, New
York, New York 10048; and 500 West Madison Avenue, Suite 1400, Chicago, Illinois
60661. Copies of such material may be obtained from the Public Reference Section
of the  Commission  at 450  Fifth  Street,  N.W.,  Washington,  D.C.  20549,  at
prescribed   rates.   The   Commission   also   maintains   a   Web   site   (at
http://www.sec.gov)  that contains reports, proxy and information statements and
other information regarding the Company. The Company's Common Stock is traded on
the Nasdaq  SmallCap  Market,  and such  reports  and other  information  can be
inspected at the offices of Nasdaq Operations,  1735 K Street, N.W., Washington,
D.C.  20006.  The  Company's  Common  Stock is also  listed on the Boston  Stock
Exchange and such material is also  available  for  inspection at the offices of
the Boston Stock Exchange, One Boston Place, Boston, Massachusetts 02109.

         The  Company  has filed with the  Commission  in  Washington,  D.C.,  a
Registration  Statement on Form S-3 under the Act with respect to the securities
offered  hereby.  As permitted by the rules and  regulations of the  Commission,
this  Prospectus  omits  certain  information   contained  in  the  Registration
Statement.  For  further  information  with  respect  to  the  Company  and  the
securities  offered  hereby,  reference  is  hereby  made  to  the  Registration
Statement  and  to  the  exhibits  and  schedules  filed  therewith.  Statements
contained in this Prospectus regarding the contents of any documents filed with,
or incorporated by reference in, the Registration  Statement as exhibits are not
necessarily  complete,  and each such  statement is qualified in all respects by
reference to the copy of the applicable documents filed with the Commission. The
Registration  Statement,  including the exhibits and schedules  thereto,  may be
inspected at the public reference facilities maintained by the Commission at 450
Fifth  Street,  N.W.,  Washington,  D.C.  20549,  and  copies of all or any part
thereof may be obtained from such office upon payment of the prescribed fees.



                                      -3-




                      INFORMATION INCORPORATED BY REFERENCE

         The  following  documents  heretofore  filed  by the  Company  with the
Commission  (File No. 1-11352)  pursuant to the Exchange Act are incorporated by
reference in this Prospectus:

         (1) Annual Report on Form 10-K for the fiscal year ended June 30, 1996;

         (2) Transition  Report on Form 10-K for the six-month  period from July
1, 1996 to December 31, 1996, as amended;

   
         (3)  Quarterly  Reports  on Form  10-Q for the  fiscal  quarters  ended
September 30, 1996, March 31, 1997 and June 30, 1997;
    

         (4)  The  Company's   Proxy   Statement  for  its  Annual   Meeting  of
Stockholders held on January 30, 1997;

         (5) The Company's Current Reports on Form 8-K filed on August 23, 1996,
September 23, 1996, January 15, 1997,  February 3, 1997, March 24, 1997 and July
3, 1997, as amended;

         (6) All other documents filed by the Company  pursuant to Section 13(a)
or 15(d) of the  Exchange  Act since the end of the fiscal  year  covered by the
Annual Report referred to in (1) above; and

         (7)  The  "Description  of  Securities"   contained  in  the  Company's
Registration  Statement No. 33-71416 on Form S-1 and  incorporating by reference
the  information  contained in the Company's  Final  Prospectus  dated March 16,
1994, filed under Section 424(b) under the Securities Act of 1933.

         All documents filed by the Company  pursuant to Sections 13(a),  13(c),
14 or 15(d) of the Exchange Act  subsequent to the date of this  Prospectus  and
prior to the  termination of this Offering shall be deemed to be incorporated by
reference  in this  Prospectus  and to be a part  hereof from the date of filing
such documents.  Any statement contained herein 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.
Copies of the documents  incorporated  herein by reference  (excluding  exhibits
unless such  exhibits  are  specifically  incorporated  by  reference  into such
documents)  may be  obtained  upon  written or oral  request  without  charge by
persons,  including  beneficial  owners,  to whom this  Prospectus is delivered.
Request should be made to Mr. Dennis R. Bilodeau, Controller,  DynaGen, Inc., 99
Erie Street, Cambridge Massachusetts 02139 (telephone: 617-491-2527).


                                      -4-


                               PROSPECTUS SUMMARY

         The following  summary  information is qualified in its entirety by the
more detailed information appearing elsewhere in this Prospectus or incorporated
herein by reference and the financial  statements which are incorporated  herein
by reference.

   
THE COMPANY              DynaGen,  Inc. (the "Company")  develops,  manufactures
                         and  markets  proprietary  and generic  diagnostic  and
                         therapeutic  products  for human  health  care.  During
                         1996,  DynaGen began  expanding its business focus from
                         being a development and licensing company to building a
                         diversified   healthcare   company   focused   on   the
                         manufacture  and  distribution of generic drug products
                         and specialty pharmaceuticals, as well as the continued
                         development  of  therapeutic products for immune system
                         modulation and bone and joint repair.

RISK FACTORS             The offering involves  substantial risk,  including the
                         Company's  history  of losses and the  anticipation  of
                         future losses,  the Company's  future capital needs and
                         the  uncertainty of additional  funding,  uncertainties
                         related  to its  current  or  future  licensing  of the
                         NicErase(R)  technology,  the  integration  of recently
                         acquired companies,  the risks associated with managing
                         a   changing    business   and   implementing    future
                         acquisitions,   limited   manufacturing  and  marketing
                         capability and experience,  competition,  dependence on
                         patents and proprietary technology, volatility of stock
                         price and limited  trading volume of Common Stock.  See
                         "Risk Factors."

SECURITIES OFFERED       15,303,000  shares of  the Company's  Common Stock, par
                         value $.01 per share.
    

OFFERING PRICE           All or part of the  Shares  offered  hereby may be sold
                         from  time  to  time  in  amounts  and on  terms  to be
                         determined by the Selling  Stockholders  at the time of
                         sale.


                                      -5-




USE OF PROCEEDS          The Company will  receive no part of the proceeds  from
                         the  sale  of  any  of  the   Shares  by  the   Selling
                         Stockholders.   The  Company  will,  however,   receive
                         proceeds  from the  exercise of the Warrants at a price
                         to be determined  based upon 120% of the average market
                         price for the  Common  Stock  for the five  consecutive
                         trading days  immediately  preceding  the date on which
                         the  Commission  declares  effective  the  Registration
                         Statement  of  which  this  Prospectus  is a part.  The
                         Company  has  received  proceeds  from  the sale of the
                         Preferred  Stock, the Warrants and the Common Shares to
                         the Selling  Stockholders,  which proceeds were applied
                         to working  capital  and the  acquisition  of  Superior
                         Pharmaceutical Company.

SELLING STOCKHOLDERS     The Shares being  offered  hereby are being offered for
                         the account of the Selling Stockholders specified under
                         the caption "Selling Stockholders."

STOCK MARKET SYMBOLS:    Nasdaq                Boston Stock Exchange
                         ------                ---------------------
Common Stock             DYGN                  DYG



                                      -6-


                                   THE COMPANY

   
         The Company,  organized in November 1988,  develops,  manufactures  and
markets  proprietary  and generic  therapeutic  and diagnostic  products for the
human health care market.  During 1996,  DynaGen  began  expanding  its business
focus from being a development  and licensing  company to building a diversified
healthcare  company focused on the manufacture and  distribution of generic drug
products and specialty pharmaceuticals,  as well as the continued development of
therapeutic products. The Company intends to implement this strategy through the
acquisition of businesses,  technologies  and products that the Company believes
are undervalued,  as well as through continued internal product development.  In
August 1996, the Company acquired the tablet business of Able Laboratories, Inc.
("Able"), a generic pharmaceutical products subsidiary of ALPHARMA USPD INC, and
in June 1997, the Company acquired Superior Pharmaceutical Company ("Superior"),
which markets and  distributes  generic  pharmaceutical  products to independent
retail chains and institutional pharmacies.
    

         DynaGen's   strategy   with   respect  to  the   multisource   (generic
pharmaceutical)  business is to compete  with other  generic  companies  through
vertical  integration  of key  elements of the  multisource  business  including
manufacturing,  packaging and distribution. In August 1996, the Company acquired
Able, a 46,000 square foot tablet and  suppository  manufacturing  facility.  As
part of this  acquisition,  the  Company  obtained  rights  to  eleven  approved
Abbreviated   New  Drug   Applications   ("ANDAs")  as  well  as  other  generic
formulations.  Since the  acquisition,  DynaGen has updated and expanded  Able's
manufacturing capability,  validated several of the acquired products, retrained
employees in quality assurance  procedures and successfully met FDA requirements
and guidelines to manufacture these products. The Company is increasing sales of
its current generic products through the expansion of its distribution  networks
and by  providing  contract  manufacturing  services  to various  pharmaceutical
companies.

         In April 1997, the Company  signed an agreement with Kali  Laboratories
Inc.  ("Kali"),  a  privately-held  company  specializing  in the development of
generic drugs.  The agreement  provides for Kali to assist DynaGen in developing
seven  specific  generic drugs and obtaining  approval of the U.S. Food and Drug
Administration ("FDA") for these drugs. The patents on these targeted drugs have
expired or will expire over the next five years and provide an  opportunity  for
DynaGen to introduce generic equivalents. Kali's management and scientific staff
have  significant  experience in developing  and obtaining  approvals on generic
drugs.

         To complement the acquisition of Able and pursue vertical  integration,
the Company acquired all of the outstanding shares of Superior. Superior markets
and distributes generic pharmaceuticals and healthcare-related products  through
a sales force of approximately  40 telemarketers. Superior markets and sells its
products to pharmacies,  physicians,  buying groups, retail chains and long-term
care and  managed  care  facilities  throughout  the United  States.  Superior's
primary  operations are in Cincinnati,  Ohio, where it employs  approximately 65
people, and has 40,000 square feet of office,  warehouse and distribution space.
Superior  also has a sales  division  located in  Memphis,  Tennessee,  where it
operates under the name of Williams Generics. Superior reported 1996 sales of


                                      -7-


approximately  $32 million  with  pre-tax  income of over $3 million.  Under the
terms of the merger agreement with Superior and its  stockholders,  DynaGen paid
Superior's  stockholders  $6.25 million in cash, $5 million in three-year  notes
and 1,666,667  shares of DynaGen's  Common Stock (which shares have a guaranteed
value of $5 million).  The  stockholders may also receive certain cash incentive
payments based on Superior's  performance  during the three years  following the
close of the transaction.

   
         DynaGen's specialty or emerging  pharmaceutical business strategy is to
create a business based on branded generic products and multi-drug  combinations
in convenient  packaging for specific  indications  and  treatments.  Physicians
routinely  prescribe  two or more  separate  drugs for the  treatment of several
common medical problems. These drugs are separately prescribed and dispensed but
are taken at  various  times  during the  course of the day as  directed  by the
physician. A major problem in such multi-drug therapies is lack of compliance by
the patient and therefore less than  desirable  therapeutic  efficacy.  For this
reason,  the  Company  initially  intends  to focus its  efforts in this area on
compliance enhancement packaging. DynaGen has identified near-term opportunities
in compliance enhancement packaging for women's healthcare products. The Company
is  developing  convenience  packaging  which it believes  will  provide ease of
prescription, dispensing, storage and self-administration.
    

         The  Company's  proposed  specialty  pharmaceutical  products are in an
early  stage  of  development   and  therefore  are  subject  to  the  risks  of
unsuccessful  development,  marketing  and  commercialization.   These  proposed
products will require substantial further development which may include clinical
testing,  bio-equivalency  studies and regulatory approval, all at a substantial
cost to the  Company.  The use of  specialty  pharmaceuticals  will  require the
acceptance of a new way of prescribing  medication and there can be no assurance
a market will develop for such products. Additional investment by the Company in
manufacturing,  marketing and sales  infrastructures will also be required prior
to  commercialization.  No assurance can be given that these development efforts
will be  successfully  completed or that the products,  if  introduced,  will be
successfully marketed.

   
         Since  its   inception,   the  Company's   business  has  consisted  of
development and licensing of proprietary  diagnostic and  therapeutic  products.
The Company's lead therapeutic product candidate, NicErase(R)-SL, is intended as
an aid in smoking  cessation  and to provide  relief  from  nicotine  withdrawal
symptoms.  Unlike currently  available  smoking cessation  products,  NicErase's
active ingredient is lobeline, a non-nicotine therapeutic compound.

         The Company recently completed a multi-center  pivotal Phase 3 clinical
trial on NicErase-SL. The combined results of its 750-subject clinical trial did
not  yield a  statistically  significant  difference  between  the  placebo  and
NicErase-SL groups. However, one center, the Tobacco Research Center at the West
Virginia  University  School of Medicine,  was able to  demonstate  efficacy and
achieve  statistical  significance.  This site, under the direction of Elbert D.
Glover,  Ph.D.,  demonstrated  23% (p = 0.033)  abstinence  rate in subjects who
received  NicErase-SL  compared to 13% rate in  subjects  who  received  placebo
treatment.

         Dr. Glover was able to repeat his earlier  success with  NicErase-SL in
the  Company's  prior pilot Phase 3 trial in which the data from his site showed
the highest  trend  toward  efficacy.  The Company  believes  that his  previous
experience  with  NicErase-SL  may have  contributed  to the higher  therapeutic
compliance  observed in this  pivotal  trial,  which  resulted  in the  clinical
efficacy  achieved at the West Virginia site. The Company also believes that the
overall low  therapeutic  compliance  reported in the pivotal trial at the other
two centers may have contributed to an overall lack of statistically significant
efficacy.


         In light of the results of the 750-subject  clinical trial, the Company
intends to discontinue the NicErase-SL  program at the present time and to focus
its resources on the  multisource  drug business and other programs now underway
at DynaGen.  The Company is  considering  alternative  delivery  formats for the
NicErase  technology and intends to seek strategic  partners to further  develop
and market  these  delivery  formats.  The Company has entered  into a licensing
agreement with Nastech
    


                                      -8-


Pharmaceutical  Company Inc.  ("Nastech") in which the Company granted Nastech a
worldwide,  exclusive  license  to  develop a lobeline  sulfate  nasal  delivery
formulation  of the  Company's  NicErase  product  candidate.  Nastech  will  be
responsible  for the  development  of  nasal  formulations,  preclinical  animal
studies and limited human studies and shall bear all the development  costs. The
Company and Nastech will cooperate in licensing the product to a third party and
will share equally in licensing fees and royalties.

         The Company  has also signed a  memorandum  of  understanding  with LTS
Lohmann  Therapie  Systeme GmbH ("LTS")  regarding the  evaluation  and possible
development  of  NicErase   transdermal  and  buccal  formulations  for  smoking
cessation  therapy.  Under this  memorandum,  it is intended  that  DynaGen will
license its NicErase  know-how,  technology and patents to LTS and that LTS will
assume  responsibility for development and manufacturing of the products and for
identification of distribution partners. The parties intend to sign a definitive
license agreement covering this relationship, but there can be no assurance that
the Company will enter into a definitive agreement.

         In December  1996,  the Company  obtained  FDA  clearance to market its
proprietary  NicCheck(R) I product,  a colorometric test strip that measures the
urinary content of nicotine and its metabolites.  The test distinguishes between
smokers and nonsmokers with 97% accuracy and is also able to distinguish between
high and low  consumers  of  nicotine.  NicCheck can be used both as a companion
product for NicErase-SL or independently  for clinical  evaluation.  The Company
has begun marketing NicCheck to physicians, smoking cessation programs, HMOs and
insurance companies.

   
         In December 1996, the Company acquired, through a licensing arrangement
from  BioLoc,  Inc.  ("BioLoc"),  rights  to a breast  biopsy  technology.  This
technology,  which is in a  developmental  stage,  is  intended  to improve  the
accuracy and  efficiency and reduce the overall cost of   surgical breast biopsy
procedures.  Core needle biopsy,  the most commonly used non-surgical  procedure
for diagnosis of suspicious  lesions in breasts,  is limited in its efficacy due
to the  difficulty  in capturing  the targeted  tissue and the need for multiple
attempts to obtain  accurate and  sufficient  samples,  resulting in unnecessary
pain,  scarring and anxiety.  The BioLoc  technology is intended to overcome the
shortcomings  of the core needle  biopsy  procedure  by  accurately  guiding the
surgical biopsy  instruments  directly to the suspected tissue lesion identified
during mammography examination.

         The Company is  developing  ImmuDyn(TM)  which is a  proprietary  lipid
preparation that modulates immune system function.  Immune modulators have shown
potential clinical  usefulness as either stand-alone drugs or as adjunct therapy
to existing  treatments  for various  immune system  deficiency  conditions  and
autoimmune diseases.  The ImmuDyn technology was exclusively licensed by DynaGen
from the  Cantacuzino  Institute of Bucharest,  Romania.  DynaGen has filed U.S.
patent  applications  covering  the broad  use of  ImmuDyn  as an immune  system
modulator as well as for  specific  target  disease  conditions,  including  HIV
infection,  thrombocytopenia  (ITP), and drug-induced  neutropenia.  The Company
intends to pursue its ImmuDyn patent position as additional  animal and clinical
study data are obtained.



                                      -9-



         Recently, the Company filed an Orphan Drug Designation application with
the FDA for the use of ImmuDyn in the  treatment of ITP.  DynaGen has  conducted
overseas  clinical  studies to  evaluate  ImmuDyn's  safety and  efficacy in the
treatment of autoimmune  diseases such as immune  thrombocytopenic  purpura ITP.
U.S.  clinical  studies will  initially  focus on ITP, an autoimmune  disease in
which the  destruction  of platelets is  accelerated.  Platelets are blood cells
that  facilitate  blood  clotting;  a decrease in  platelet  count can result in
life-threatening  bleeding  episodes.  The Company  has also  tested  ImmuDyn in
individuals  with compromised  immune system  function,  such as in cases of HIV
infection and in individuals receiving cancer chemotherapy. The results of these
trials  have  indicated  an  acceptable  safety  profile  and  suggest  positive
efficacy.  The  ImmuDyn  technology  is in an  early  stage of  development  and
therefore is subject to the risks of  unsuccessful  development,  marketing  and
commercialization. No assurance can be given that these development efforts will
be  successfully  completed,  that a patent will be issued  covering the ImmuDyn
technology or that the products, if introduced, will be successfully marketed.
    

         The Company is also developing OrthoDyn(R), a bioresorbable bone cement
system  for  bone  and  joint  repair,  which is  currently  in the  preclinical
development  stage.  In April 1997,  the Company  entered into an agreement with
Smith & Nephew,  plc ("Smith & Nephew")  providing  Smith & Nephew an  exclusive
period  of 12  months to  evaluate  the  OrthoDyn  product's  human  orthopaedic
applications.   Additionally,   the  Company  expanded  its  resorbable  polymer
technology  patent  base by  obtaining  a  patent  for its  Sleeper(TM)  vaccine
technology  which  enables  vaccines to be delivered in a single  administration
rather than in multiple vaccinations over a period of time.

         The Company has also developed proprietary diagnostic tests for certain
infectious diseases including tuberculosis. The Company is currently selling the
MycoDot(R) product, a test to detect antibodies against mycobacteria in blood or
serum,  through  distributors  primarily in Asia, Pacific Rim countries,  China,
India and  Japan.  The  Company's  MycoAKT(R)  products,  diagnostic  tests that
identify three mycobacterial species in culture, are sold by a third party under
exclusive  U.S.   manufacturing  and  distribution   rights  and  semi-exclusive
worldwide rights granted by the Company.

         The Company  maintains its principal  executive  offices and laboratory
facilities at 99 Erie Street,  Cambridge,  Massachusetts  02139, U.S.A., and its
telephone number is (617) 491-2527.



                                      -10-



                                  RISK FACTORS

         The shares of Common Stock offered hereby involve a high degree of risk
and  should not be  purchased  by  persons  who cannot  afford the loss of their
entire investment.  The following factors,  in addition to the other information
discussed in this  Prospectus,  should be considered  carefully in evaluating an
investment in the Company and its business.

   
         HISTORY OF LOSSES;  ANTICIPATION  OF FUTURE  LOSSES.  The  Company  has
incurred operating losses since its inception and has an accumulated  deficit of
$29,109,494 as of June 30, 1997.  The Company  incurred a net loss of $4,794,304
for the  six  months  ended  June  30,  1997,  as  compared  with a net  loss of
$3,287,603 for the same period ended June 30, 1996.  The Company  incurred a net
loss of $4,306,140  for the six months ended December 31, 1996, as compared with
a net loss of  $1,809,816  for the same period  ended  December  31,  1995.  The
Company  incurred a net loss of  $5,097,419  for the fiscal  year ended June 30,
1996,  compared with a net loss of $3,042,383 for the fiscal year ended June 30,
1995. Such losses have resulted  principally from expenses  incurred in research
and development and from general and  administrative  costs  associated with the
Company's  development  efforts.  In addition,  the Able subsidiary has incurred
operating losses resulting primarily from insufficient  revenues.  The continued
development of the Company's products will require the commitment of substantial
resources to conduct further  development  and preclinical and clinical  trials,
and to establish manufacturing,  sales, marketing, regulatory and administrative
capabilities. In addition, the Company's recently acquired subsidiary, Able, has
incurred net operating  losses in the past.  The Company  expects to provide its
Able subsidiary  with working  capital during the foreseeable  future until Able
can become  self-supporting.  The Company expects to incur substantial operating
losses over the next  several  years as its  product  programs  expand,  various
clinical trials commence and marketing  efforts are launched.  The amount of net
losses and the time required by the Company to reach sustained profitability are
highly  uncertain and to achieve  profitability,  the Company must,  among other
things,  successfully  complete  development of its products,  obtain regulatory
approvals,  and establish  manufacturing and marketing capabilities by itself or
with third  parties.  There is no assurance  that the Company will ever generate
substantial  revenues  from its  proprietary  and  generic  products  or achieve
profitability.
    

         FUTURE  CAPITAL  NEEDS;   UNCERTAINTY  OF  ADDITIONAL  FUNDING.  It  is
anticipated  that the Company  will  continue to expend  significant  amounts of
capital to fund its  research  and  development,  clinical  trials  and  generic
pharmaceutical business and future acquisitions, if any. The Company's available
working  capital is  inadequate  for  completion  of the  Company's  development
programs,  and additional  financing will be necessary for the continued support
of the Company's  proposed products and operations,  including the establishment
of  manufacturing,  marketing  and  distribution  capabilities  for its proposed
products and the  continued  operations  of Able and  Superior.  There can be no
assurance that the Company will be able to secure  additional  financing or that
such financing will be available on favorable terms. If the Company is unable to
obtain such additional financing,  the Company's ability to maintain its current
level of operations  would be materially and adversely  affected and the Company
will be required to reduce its overall  expenditures  including its research and
development activity with respect to certain proposed products.




                                      -11-


   
         UNCERTAINTIES RELATED TO NICERASE.  Under applicable law, the Company's
current or future  licensees  will not be permitted to sell  NicErase,  and thus
generate any revenue from their development of NicErase,  unless they obtain the
necessary  regulatory  approvals  from the FDA for the  commercial  sale of that
product.  To obtain such regulatory  approvals,  the Company's current or future
licensees must demonstrate to the  satisfaction of the FDA, through  preclinical
studies and clinical  trials,  that NicErase is safe and effective.  In light of
the Company's  recently completed pivotal Phase 3 clinical trial of NicErase-SL,
which did not show statistically  significant efficacy, the Company is unable to
predict  whether  delivery  formulations  of lobeline other than sublingual will
demonstrate acceptable safety and efficacy to obtain FDA approval.  There can be
no assurance  that the  Company's  current or future  licensees  will be able to
successfully  formulate new delivery  systems for lobeline,  that such licensees
will have  sufficient  technological  or  financial  resources  to initiate  and
complete  the required  clinical  trials,  or that such trials will  demonstrate
sufficient  safety and efficacy to obtain the required  regulatory  approvals or
develop  marketable  products.  A  number  of  companies  in the  pharmaceutical
industry have suffered  significant  setbacks in advanced clinical trials,  even
after promising  results in earlier trials. If any future clinical trials do not
show NicErase to be safe and effective in any alternative  delivery format,  and
if the  Company's  licensees  are thus  unable to  commercialize  NicErase,  the
Company will not realize any revenues from the NicErase product.
    

         INTEGRATION  OF ABLE AND SUPERIOR  ACQUISITIONS.  In August  1996,  the
Company acquired certain assets of Able, and in June 1997, the Company purchased
all of the  outstanding  shares of Superior.  There can be no assurance that the
anticipated  benefits  from the Able or Superior  acquisition  will be realized.
Additionally,  there  can be no  assurance  that  the  Company  will  be able to
effectively market the existing Able products,  that it will obtain FDA approval
to market additional generic drugs or that it will be successful in managing the
combined  operations.  The integration of Able and Superior requires substantial
attention from management,  many of whom have limited  experience in integrating
acquisitions.   The  diversion  of  management's   attention,   the  process  of
integrating  the businesses and any  difficulties  encountered in the transition
process  could  cause an  interruption  of  business,  and could have a material
adverse effect on the Company's operations and financial performance.

         RISKS  ASSOCIATED  WITH MANAGING A CHANGING  BUSINESS.  The Company has
begun to expand  its  business  focus  from being a  development  and  licensing
company to building a diversified  healthcare company focused on the manufacture
and  distribution of generic drug products as well as the continued  development
of therapeutic and diagnostic products. In order to achieve this expansion,  the
Company  must  undergo  substantial   changes  in  its  operations,   which  may
significantly  strain the  Company's  limited  administrative,  operational  and
financial  resources.  The  ability  of the  Company  to  achieve  its  business
objectives  will  depend in large  part on its  ability  to build and expand its
manufacturing  operations  and sales and  marketing  capabilities,  to generally
expand its operational capabilities and its financial and management information
systems, to develop the management skills of its managers and supervisors and to
train,  motivate  and manage  both its  existing  employees  and the  additional
employees that will be required if the Company is to expand its business.  There
can be no assurance  that the Company



                                      -12-


will succeed in developing all or any of these capabilities,  and any failure to
do so would have a material adverse effect on the Company's business,  financial
condition and results of operations.

         FUTURE  ACQUISITIONS.  Management  may from time to time consider other
acquisitions of assets,  businesses or technologies that will enable the Company
to acquire complementary skills and capabilities, offer new products, expand its
customer base or obtain other competitive advantages.  There can be no assurance
that the Company  will be able to  successfully  identify  suitable  acquisition
candidates,  obtain  financing on  satisfactory  terms,  complete  acquisitions,
integrate  acquired  operations into its existing  operations or expand into new
markets.  Acquisitions  may result in potentially  dilutive  issuances of equity
securities, the incurrence of debt and contingent liabilities,  and amortization
expense related to intangible  assets  acquired,  any of which could  materially
adversely affect the Company's business and results of operations. Acquisitions,
including  the Company's  recent  acquisitions  of Able and Superior,  involve a
number of potential  risks,  including  difficulties in the  assimilation of the
acquired company's operations and products, diversion of management's resources,
uncertainties  associated  with  operating  in new markets and working  with new
employees and customers,  and the potential  loss of the acquired  company's key
employees.   There  can  also  be  no  assurance  that  the  Able  and  Superior
acquisitions and future  acquisitions,  if any, will not have a material adverse
effect upon the Company's  business and results of operations.  Once integrated,
acquired  operations may not achieve expected levels of revenues,  profitability
or productivity, or otherwise perform as expected.

         LIMITED   MANUFACTURING   CAPABILITY  AND  EXPERIENCE.   The  Company's
NicCheck,   MycoDot  and  MycoAKT   products  are  currently  made  by  licensed
manufacturers.  The Company  intends to enter into  licenses,  joint venture and
similar  collaborative  arrangements  with third parties for the  manufacture of
other  proprietary  products  and  proposed  products.  There are no other  such
agreements  and there can be no assurance that the Company will be successful in
securing manufacturing  agreements for its products or that such agreements will
prove to be on terms  favorable  to the  Company.  In  addition,  the  Company's
dependence  upon third parties for the  manufacture of its products and proposed
products  could have an adverse  effect on the Company's  profitability  and its
ability to deliver its proposed  products on a timely and competitive  basis. To
the extent that the Company  attempts to manufacture any of its products,  there
can be no  assurance  that  the  Company  will  be able to  attract  and  retain
qualified manufacturing personnel, or build or rent manufacturing facilities.

         The Company's generic therapeutic products are manufactured at its Able
Laboratories  facility in South  Plainfield,  New  Jersey.  In order to maintain
compliance with FDA Good Manufacturing Practices ("GMP") standards,  the Company
will  have to make  significant  investments  in its  infrastructure  and  plant
facility.  The Company will need to raise capital to finance  these  investments
and there  can be no  assurance  that the  Company  will be able to obtain  such
financing or that such financing will be available on favorable terms. There can
be no assurance that such capital  expenditures and overhead costs will not have
a material adverse effect upon the Company's  ability to achieve  profitability.
There can be no  assurance  that the Company  will retain the key  employees  it
acquired in the Able acquisition.


                                      -13-


         LIMITED  COMMERCIALIZATION  OF  PROPRIETARY  PRODUCTS.  The Company has
commercially  introduced and is currently  marketing  through  distributors only
three of its proprietary  products,  yielding  limited revenues from the sale of
these products.  Historically,  substantially all of the Company's  revenues had
been  generated  from research and  development  contracts and license fees. The
Company's ability to achieve profitability will depend on its ability to develop
and introduce  commercially  viable products,  obtain  regulatory  approvals for
these products and either successfully  manufacture,  market and distribute such
products  on  its  own  or  enter  into  collaborative  agreements  for  product
manufacturing,  marketing  and  distribution.  Many  of the  Company's  proposed
therapeutic   and   diagnostic   products  will  require   substantial   further
development,  preclinical and clinical testing, and investment by the Company or
third party  licensees in  manufacturing,  marketing  and sales  infrastructures
prior to their  commercialization.  No assurance can be given that the Company's
development efforts will be successfully  completed,  that regulatory  approvals
will be obtained, or that these products, once introduced,  will be successfully
marketed.

         EARLY STAGE OF PRODUCT  DEVELOPMENT.  Several of the Company's proposed
products,  including its specialty pharmaceuticals,  OrthoDyn, the breast biopsy
technology being licensed from BioLoc and the bacterial extract for treatment of
infectious diseases, are at an early stage of development.  The Company does not
expect that its early stage products will be available for a significant  number
of years, if at all. The early stage products will require significant  research
and  development,  and  potential  products that appear to be promising at early
stages  of  development  may not  reach  the  market  for a number  of  reasons.
Potential products may be found ineffective or cause harmful side effects during
preclinical  testing or clinical trials,  fail to receive  necessary  regulatory
approvals,  be difficult to manufacture  on a large scale,  be  uneconomical  to
produce,   fail   to   achieve   market   acceptance   or  be   precluded   from
commercialization  by  proprietary  rights  of third  parties.  There  can be no
assurance that the Company's or its collaborative  partners' product development
efforts will be successfully completed,  that required regulatory approvals will
be obtained or that any products,  if introduced,  will be successfully marketed
or achieve customer acceptance.

         LACK OF MARKETING  EXPERIENCE.  The Company  currently does not plan to
market its proprietary products directly and does not have adequate resources or
expertise to develop a substantial  marketing  organization  and internal  sales
force for these products. Since the Company does not have the financial or other
resources  to  undertake  extensive  direct  marketing  activities,  the Company
intends to enter into  marketing  arrangements  with  third  parties,  including
possible joint venture, license or distribution arrangements.  While the Company
intends to license its products for manufacture  and sale to established  health
care or pharmaceutical companies, it has had very limited success in its efforts
to enter  into  such  agreements  to date.  There can be no  assurance  that the
Company will be able to locate  collaborative  partners or that these  strategic
alliances, if consummated, will prove successful.

         With respect to the Company's generic therapeutic  products,  there can
be no assurance  that present and potential  customers of Able and Superior will
continue their recent buying patterns, and any significant delay or reduction in
orders could have a material adverse effect on the Company's  near-term business
and results of operations.


                                      -14-


         REGULATION BY GOVERNMENT AGENCIES. The Company's research,  preclinical
development,  clinical  trials,  manufacturing  and  marketing  of its  proposed
products  are  subject  to  extensive   regulation   by  numerous   governmental
authorities  in the United  States  (including  the FDA),  and other  equivalent
foreign regulatory authorities.  The process of obtaining FDA and other required
regulatory  approvals is lengthy and  expensive.  There can be no assurance that
the Company will be able to obtain the necessary  approvals for clinical testing
or for  the  manufacturing  or  marketing  of its  proposed  products.  Further,
additional  governmental  regulation may be  established  which could prevent or
delay regulatory approval of the Company's products.  The regulatory process may
delay for long periods,  and  ultimately  prevent,  marketing of new products or
impose  costly  procedures  that  would have a  material  adverse  effect on the
Company's   business.   Failure  to  comply  with  the   applicable   regulatory
requirements can, among other things, result in fines, suspensions of regulatory
approvals, product recalls, operating restrictions and criminal prosecution.

         The Company's  success in the generic drug market depends,  in part, on
its ability to obtain FDA approval of ANDAs for its new products, as well as its
ability to procure a  continuous  supply of raw  materials  and to validate  the
manufacturing  processes  used  to  produce  consistent  test  batches  for  FDA
approval.  Sources for certain  materials  for the  Company's  products  must be
approved by the FDA, and in many instances only one source has been approved. If
raw materials from a specified supplier were to become unavailable,  the Company
would  be  required  to  file  a  supplement  to its  ANDA  and  revalidate  the
manufacturing process using a new supplier's materials. This could cause a delay
of several  months in the  manufacture  of the drug involved and the  consequent
loss of potential revenue and market share. Additionally,  there is often a time
lag, sometimes significant,  between the receipt of ANDA approval and the actual
marketing of the approved product due to this validation process.

         The Able  Laboratories  facility is subject to plant inspections by the
FDA to determine compliance with GMP standards.  The Company could be subject to
fines and sanctions  such as the suspension of  manufacturing  or the seizure of
drug products if it were found to be in non-compliance with GMP standards.

         RAPID  TECHNOLOGICAL  ADVANCES AND  COMPETITION.  The  therapeutic  and
diagnostic  markets in which the  Company  competes  have  undergone  and can be
expected to continue to undergo rapid and  significant  technological  advances.
There can be no assurance that the technological developments of others will not
render the Company's technology or products incorporating such technology either
uneconomical  or obsolete.  The Company  competes  with a number of  specialized
biotechnology  companies  and  major  pharmaceutical  companies.  Most of  these
companies have substantially  greater  financial,  technical and human resources
and research and  development  staffs and facilities,  as well as  substantially
greater  experience  in  conducting   clinical  trials,   obtaining   regulatory
approvals, and manufacturing and marketing products than does the Company. There
can be no assurance  that the  Company's  products or proposed  products will be
able to compete successfully.



                                      -15-


         In addition,  with its newly acquired generic product line, the Company
is now competing in a new market with off-patent drug manufacturers,  brand-name
pharmaceutical   companies  that  manufacture  off-patent  drugs,  the  original
manufacturers  of brand-name  drugs and  manufacturers  of new drugs that may be
used for the same indications as the Company's  products.  There is no assurance
that the Company will compete  successfully  in this market.  Revenues and gross
profit  derived from generic  pharmaceutical  products  tend to follow a pattern
based on regulatory and competitive factors unique to the generic pharmaceutical
industry.  As patents for brand name  products and related  exclusivity  periods
mandated by regulatory  authorities  expire,  the first generic  manufacturer to
receive regulatory  approval for generic equivalents of such products is usually
able to achieve  relatively  high  revenues and gross  profit.  As other generic
manufacturers  receive regulatory  approvals on competing  products,  prices and
revenues typically decline.  Accordingly, the level of revenues and gross profit
attributable to generic  products  developed and  manufactured by the Company is
dependent,  in part,  on its  ability  to  develop  and  introduce  new  generic
products, the timing of regulatory approval of such products, and the number and
timing of regulatory approvals of competing products.  In addition,  competition
in the United States generic pharmaceutical market continues to intensify as the
pharmaceutical  industry  adjusts to increased  pressures to contain health care
costs.  Brand name  companies are  increasingly  selling their products into the
generic market directly by acquiring or forming strategic alliances with generic
pharmaceutical  companies. No regulatory approvals are required for a brand name
manufacturer  to sell  directly or through a third party to the generic  market,
nor do such manufacturers face any other significant barriers to entry into such
market.  These  competitive  factors may have a material  adverse  effect on the
Company's ability to sell its generic products.

         DEPENDENCE  ON PATENTS AND  PROPRIETARY  TECHNOLOGY.  The Company  owns
certain patents and has applied for other patents relating to its technology and
proposed products.  No assurance can be given,  however,  whether pending patent
applications  will be granted or whether any patents granted will be enforceable
or provide the Company with meaningful  protection from  competitors.  Even if a
competitor  were to infringe the Company's  patents,  the costs of enforcing its
patent rights may be substantial or even prohibitive.  In addition, there can be
no assurance that the Company's  proposed  products will not infringe the patent
rights of others. The Company may be forced to expend  substantial  resources if
the Company is required to defend  against  any such  infringement  claims.  The
Company also may desire or be required to obtain  licenses  from others in order
to further develop, produce and market commercially viable products effectively.
There can be no assurance that such licenses will be obtainable on  commercially
reasonable  terms, if at all, that the patents  underlying such licenses will be
valid  and  enforceable  or  that  the  proprietary  nature  of  the  unpatented
technology  underlying such licenses will remain  proprietary.  The Company also
relies on unpatented proprietary know-how and trade secrets, and employs various
methods  including  confidentiality  agreements  with  employees,   consultants,
manufacturing and marketing  partners to protect its trade secrets and know-how.
However,  such methods may not afford  complete  protection  and there can be no
assurance  that others will not  independently  develop  such trade  secrets and
know-how or obtain access thereto.


                                      -16-


         The manufacture and sale of certain  products  developed by the Company
will  involve  the use of  processes,  products  or  information,  the rights to
certain of which are owned by others. Although the Company has obtained licenses
with regard to the use of certain  such  processes,  products  and  information,
there can be no assurance  that such  licenses  will not be terminated or expire
during  critical  periods,  that the Company will be able to obtain licenses for
other rights which may be important to it, or, if obtained,  that such  licenses
will be obtained on commercially  reasonable  terms. If the Company is unable to
obtain such  licenses,  the Company  may have to develop  alternatives  to avoid
infringing patents of others,  potentially causing increased costs and delays in
product development and introduction, or precluding the Company from developing,
manufacturing or selling its proposed  products.  Additionally,  there can be no
assurance   that  the  patents   underlying  any  licenses  will  be  valid  and
enforceable.  To the extent any  products  developed by the Company are based on
licensed technology,  royalty payments on the licenses will reduce the Company's
gross profit from such product  sales and may render the sales of such  products
uneconomical.

         UNCERTAINTY OF AVAILABILITY OF HEALTH CARE REIMBURSEMENTS.  The ability
of the Company to maintain  profitability  in  Superior's  generic  distribution
business  or to  commercialize  its  product  candidates  depends in part on the
extent to which  reimbursement  for the cost of such  products will be available
from government health administration  authorities,  private health insurers and
other  organizations.  Third party  payors are  attempting  to control  costs by
limiting   the  level  of   reimbursement   for  medical   products,   including
pharmaceuticals, which may adversely effect the pricing of the Company's product
candidates.  Moreover,  health care reform has been,  and may continue to be, an
area of national and state focus, which could result in the adoption of measures
which could  adversely  affect the pricing of  pharmaceuticals  or the amount of
reimbursement  available from third party payors. There can be no assurance that
health care reimbursement laws or policies will not materially  adversely affect
the  Company's  ability to sell its products  profitably  or prevent the Company
from realizing an appropriate return on its investment in product development.

         UNCERTAINTIES  RELATED TO PRODUCT  SUPPLIERS.  Superior  purchases  its
products from several pharmaceutical manufacturers.  If a manufacturer is unable
to supply a product  or is unable to supply a product  at a  competitive  price,
Superior may lose  revenues or  experience  significantly  reduced  gross profit
margins. One or more of Superior's products could be subject to a manufacturer's
product recall due to manufacturing defects or other reasons. Such recalls would
result  in lost  revenues  and  additional  costs to  Superior.  There can be no
assurance  that Superior can maintain a continuous and  uninterrupted  supply of
products.

         CUSTOMER  CONCENTRATION;  CONSOLIDATION  OF DISTRIBUTION  NETWORK.  The
distribution  network  for  pharmaceutical  products  has in recent  years  been
subject  to  increasing  consolidation.  As a  result,  a  few  large  wholesale
distributors control a significant share of the market. In addition,  the number
of  independent  drug stores and small chains has  decreased as retail  pharmacy
consolidation  has  occurred.  Further  consolidation  among,  or any  financial
difficulties  of,  distributors  or retailers could result in the combination or
elimination  of warehouses,  thereby  stimulating  product  returns to Superior.
Consolidation  or financial  difficulties  could cause customers to reduce their
inventory  levels, or otherwise reduce purchases of Superior's  products,


                                      -17-

which could have a material adverse effect on the Company's business, results of
operations and financial condition.
   
         VOLATILITY OF STOCK PRICE.  The market for securities of  biotechnology
companies,  including those of the Company, has been highly volatile. The market
price of the Company's  Common Stock has fluctuated  between $7.00 and $.50 from
January 1, 1993 to June 30, 1997 and was $0.38 on September  9, 1997,  and it is
likely that the price of the Common Stock will  continue to fluctuate  widely in
the future.  Announcements of technical  innovations,  new commercial  products,
results of clinical trials,  regulatory approvals,  patent or proprietary rights
or other developments by the Company or its competitors could have a significant
impact on the Company's business and the market price of the Common Stock.

         DILUTION.  At June 30, 1997, the net tangible book value of the Company
was  $(9,527,314),  or  approximately  $(0.30)  per  share.  Purchasers  of  the
Company's Common Stock offered hereby will experience  immediate and substantial
dilution. See "Dilution."
    

         LIMITED  TRADING  VOLUME OF COMMON STOCK.  The  development of a public
market having the desirable characteristics of liquidity and orderliness depends
upon the presence in the  marketplace  of a sufficient  number of willing buyers
and  sellers at any given  time,  over which  neither the Company nor any market
maker has any control. Accordingly, there can be no assurance that a significant
trading market for the securities  offered hereby will develop,  that quotations
will be  available on the Nasdaq as  contemplated,  or if a  significant  market
develops,  that such market will  continue.  Although the trading volume for the
Common Stock, as reported by the Nasdaq, averaged 675,595 shares per week during
the 52-week  period  ended June 30, 1997 and 689,236  shares per week during the
four-week  period  ended June 30, 1997,  there can be no assurance  that persons
purchasing  the  securities  offered  hereby  will be able to  readily  sell the
securities at the time or price desired.

   
         ADVERSE CONSEQUENCES  ASSOCIATED WITH RESERVATION OF SUBSTANTIAL SHARES
OF COMMON STOCK.  Excluding the Shares offered hereby,  the Company has reserved
18,403,400  shares of Common Stock for issuance upon the  conversion or exercise
of its outstanding warrants,  convertible preferred stock and a convertible note
and  4,101,300  shares  for  issuance  to  employees,  officers,  directors  and
consultants.  The price  which the  Company  may  receive  for the Common  Stock
issuable upon exercise of such options and warrants will, in all likelihood,  be
less than the  market  price of the Common  Stock at the time of such  exercise.
Consequently,  for the life of such options and warrants the holders thereof may
have been given,  at nominal cost, the  opportunity to profit from a rise in the
market price of the Common Stock.
    

         The exercise of all of the aforementioned securities may also adversely
affect the terms under which the Company could obtain additional equity capital.
In all likelihood, the Company would be able to obtain additional equity capital
on  terms  more  favorable  to the  Company  at the  time  the  holders  of such
securities choose to exercise them. In addition,  should a significant number of
these  securities  be  exercised,  the  resulting  increase in the amount of the
Common  Stock in the public  market  may  reduce the market  price of the Common
Stock. Also, the Company has agreed that, under certain  circumstances,  it will
register under Federal and state


                                      -18-


securities laws certain  securities  issuable in connection with warrants issued
to the investment banker and placement agent of the Company's Common Stock.
















                                      -19-



                                    DILUTION
   
         "Dilution"  represents  the  difference  between the  assumed  price to
public  per share of  Common  Stock and the net  tangible  book  value per share
immediately after the completion of this offering.  "Net tangible book value per
share" represents the amount of total tangible assets less total liabilities and
preferred stock at liquidation value,  divided by the number of shares of Common
Stock outstanding.

         As of June 30,  1997,  the net  tangible  book  value of the  Company's
Common Stock was  $(9,527,314) or $(0.30) per share of Common Stock.  Assuming a
price to the public of $0.38 per share (based upon the last reported sales price
of the Common Stock on Nasdaq at September 9, 1997),  there will be an immediate
dilution  per share of $0.68 to new  investors  purchasing  the  Shares  offered
hereby.
    


         The following table illustrates the dilution per share described above:
<TABLE>
<CAPTION>

<S>                                                                                    <C>

   
           Assumed price to public per share.......................................    $ 0.38

           Net tangible book value per share at June 30, 1997, as defined above....    $(0.30)
                                                                                       ------

           Dilution to new investors...............................................    $ 0.68
</TABLE>
    


         In June 1997, the Company issued the Preferred  Stock, the Warrants and
the Common  Shares to the  Selling  Stockholders  as part of  private  placement
transactions. Each share of Preferred Stock is convertible into shares of Common
Stock at any time at the option of the Selling Stockholder holding such share of
Preferred Stock, subject to certain limitations, at a discount on the average of
the closing bid price per share of the  Company's  Common Stock for the five (5)
consecutive  trading  days  ending  immediately  prior to the date the notice of
conversion  is received by the  Company.  The Warrants  are  exercisable  for an
aggregate of 328,000  shares of Common Stock at a purchase price per share equal
to 120% of the  average  market  price  for the five  consecutive  trading  days
immediately  preceding the date on which the Commission  declares  effective the
Registration Statement of which this Prospectus forms a part.

   
         The pro forma net tangible book value of the Company's  Common Stock at
June 30, 1997, assuming full conversion of the Preferred Stock,  exercise of the
Warrants  and issuance of the Common  Shares  (based upon a price of $0.39 which
represents  an average of the closing  bid price for the Common  Stock on Nasdaq
for the five(5) consecutive trading days ended on September 9, 1997),  resulting
in the issuance of  approximately  16,865,660  shares,  would be $(4,022,204) or
$(0.08)  per share.  Assuming  a price to the  public of $0.38 per share,  there
would be an immediate dilution per share of $0.46 to new investors.

         At September 9, 1997, the Company had  outstanding  options to purchase
4,101,300  shares of Common Stock,  at exercise prices ranging between $0.01 and
$6.25 per  share.  At  September  9,  1997,  the  Company  also had  outstanding
warrants, convertible preferred stock and a convertible note which have exercise
or conversion  prices ranging  between $.01 and $4.37,  which if exercised would
result in the issuance of



                                      -20-




18,403,400  shares of Common Stock.  To the extent such options and warrants are
exercised  below the net  tangible  book value per share,  there will be further
dilution to the  purchasers of the Shares offered hereby from the assumed public
offering price.
    

                                 USE OF PROCEEDS

         The Company will  receive no part of the proceeds  from the sale of any
of the Shares by any of the Selling  Stockholders.  The Company  will,  however,
receive  proceeds  from the exercise of the Warrants at a price to be determined
based upon 120% of the average  market  price for the Common  Stock for the five
consecutive trading days immediately  preceding the date on which the Commission
declares  effective  the  Registration  Statement of which this  Prospectus is a
part.  The Company has received  proceeds from the sale of the Preferred  Stock,
the Warrants and the Common Shares to the Selling  Stockholders,  which proceeds
were applied to working capital and the acquisition of Superior.

                              SELLING STOCKHOLDERS

         The following  table sets forth  information  concerning the beneficial
ownership of shares of Common Stock by the Selling  Stockholders  as of the date
of this  Prospectus  and the  number of such  shares  included  for sale in this
Prospectus  assuming  the  sale  of  all  such  Shares  being  offered  by  this
Prospectus. To the best of the Company's knowledge, except as noted by footnote,
none of the Selling  Stockholders has held any office or maintained any material
relationship  with the Company or any of its predecessors or affiliates over the
past  three  years.  The  Selling  Stockholders  may reduce the number of shares
offered  for  sale  or  otherwise  decline  to  sell  any or  all of the  Shares
registered hereunder.

<TABLE>
<CAPTION>
   
                                                                 Number of Shares
                                                               to be Acquired upon               Number of
                                    Number of Shares of      Conversion of Preferred             Shares of
                                 Common Stock Owned Prior             Stock                     Common Stock
                                      to the Offering            and/or Exercise                     to
             Names                                                  of Warrant                    be Sold
             -----              -------------------------    -----------------------            -------------

<S>                                       <C>                        <C>                       <C>          
Ardsen Financial S.A.                     0(1)                       (2)(3)                    1,273,112(2)(3)(4)

Voica Trading S.A.                        0(1)                       (2)(3)                    1,060,927(2)(3)(4)

Taib Bank E.C.                            0(1)                       (2)(3)                      909,366(2)(3)(4)

Sovereign Partners LP                     0(1)                       (2)(3)                    1,515,610(2)(3)(4)

Legong Investments N.V.                   0(1)                       (2)(3)                    1,515,610(2)(3)(4)



                                      -21-





RIC Asset Limited                         0(1)                       (2)(3)                    1,515,610(2)(3)(4)

Gross Foundation                          0(1)                       (2)(3)                      757,805(2)(3)(4)

Deere Park                                0(1)                       (2)(3)                      757,805(2)(3)(4)

Lampton, Inc.                             0(1)                       (2)(3)                      303,122(2)(3)(4)

Throne LTD                                0(1)                       (2)(3)                      303,122(2)(3)(4)

Colbo KFT                                 0(1)                       (2)(3)                      697,180(2)(3)(4)

The Endeavour Capital Fund S.A.           0(1)                       (2)(3)                    1,818,731(2)(3)(4)

Julius Baer Securities Inc.,           855,166(1)                       (2)                    1,725,000(2)(5)
as agent for certain non-U.S.
persons

Coutts & Co. AG                        150,000                            0                      150,000
Curzon Management Limited            1,000,000                            0                    1,000,000
    
</TABLE>

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

(1)      Does not include shares of Common Stock issuable upon conversion of the
         Preferred Stock or exercise of the Warrants.

(2)      The Selling  Stockholder  can receive  shares of Common  Stock  through
         conversion of the Preferred  Stock.  The Preferred Stock is convertible
         into  Common  Stock at the lesser of (i) 120% with  respect to Series A
         Stock or 125%  with  respect  to Series B Stock of the  average  market
         price for the five consecutive  trading days immediately  preceding the
         date on  which  the  Commission  declares  effective  the  Registration
         Statement of which this  Prospectus  forms a part or (ii) a discount on
         the average market price for the Common Stock for the five  consecutive
         trading  days  immediately  preceding  the date on which the  Preferred
         Stock is converted.  The terms of the  Preferred  Stock provide that no
         holder of Preferred Stock and its affiliates may  beneficially  own, in
         the  aggregate,  more than  4.9% of the  Company's  outstanding  Common
         Stock.

(3)      The Selling  Stockholder  can receive  shares of Common  Stock  through
         exercise of the Warrants. The exercise price of the Warrants is 120% of
         the average market price for the Common Stock for the five  consecutive
         trading days  immediately  preceding  the date on which the  Commission
         declares effective the Registration  Statement of which this Prospectus
         is a part.



                                      -22-




(4)      Consists of shares of Common Stock  included in this  offering that are
         issuable upon  conversion  of the Series A Stock,  upon exercise of the
         Warrant and in payment of  dividends on the Series A Stock held by such
         Selling Stockholder.

   
(5)      Consists of 225,000  shares of Common  Stock owned plus up to 1,500,000
         shares of Common Stock included in this offering that are issuable upon
         conversion  of the Series B Stock and in payment  of  dividends  on the
         Series B Stock.
    




                                      -23-




                              PLAN OF DISTRIBUTION

         The  distribution  by the  Selling  Stockholders  of the  Shares may be
effected in one or more transactions that may take place in the over-the-counter
market, or such other market on which the Company's  securities may from time to
time be trading,  including  ordinary broker's  transactions or through sales to
one or more  dealers  for  resale of the  Shares  as  principals,  in  privately
negotiated  transactions,  through the writing of options on the Shares (whether
such options are listed on an options exchange or otherwise) or by a combination
of such methods of sale,  at fixed prices that may be changed,  at market prices
prevailing  at the time of sale,  at prices  related to such  prevailing  market
prices  or at  negotiated  prices.  If  the  Selling  Stockholders  effect  such
transactions by selling the Shares through underwriters, dealers or agents, such
underwriters,  dealers  or  agents  may  receive  compensation  in the  form  of
underwriting discounts, concessions or commissions from the Selling Stockholders
and/or the purchasers of the Shares for whom they may act as agent.  The Selling
Stockholders  and any such  underwriters,  dealers or agents that participate in
the distribution of the Shares may be deemed to be underwriters,  and any profit
on the sale of the Shares by them and any discounts,  commissions or concessions
received  by them may be deemed to be  underwriting  discounts  and  commissions
under the  Securities  Act.  The Selling  Stockholders  may also sell the Shares
pursuant  to Rule 144 under the  Securities  Act.  Brokers or dealers  acting in
connection  with the sale of the  Shares  may  receive  fees or  commissions  in
connection therewith.  The Company will not receive any of the proceeds from the
sale of the Shares by the Selling Stockholders.

         Under  applicable  rules and  regulations  under the Exchange  Act, any
person   engaged  in  a   distribution   of  shares  of  Common  Stock  may  not
simultaneously engage in market making activities with respect to such shares of
Common Stock for a period of nine  business  days prior to the  commencement  of
such  distribution,  subject to certain  exceptions.  In  addition  and  without
limiting  the  foregoing,   the  Selling   Stockholders  and  any  other  person
participating  in the  distribution  of the Shares will be subject to applicable
provisions  of the  Exchange  Act  and the  rules  and  regulations  thereunder,
including, without limitation, Rule 10b-5 and Regulation M, which provisions may
limit the time of purchases and sales of any Shares by the Selling  Stockholders
or any other such person.  All of the foregoing may affect the  marketability of
the Shares.

         The  Company  has  agreed  with the  Selling  Stockholders  to file the
Registration  Statement of which this  Prospectus is a part with the Commission,
and has agreed with the Selling Stockholders to keep the Registration  Statement
effective  until June 18,  1999 or such  earlier  time as all of the Shares have
been sold. The Company will pay all of the expenses incident to the registration
of the Shares and certain other  expenses  related to the offering.  The Company
has agreed to indemnify the Selling  Stockholders  against  certain  liabilities
they may incur in connection with the issuance and sale of the Shares, including
liabilities  under the Securities Act. To the extent any  indemnification  by an
indemnifying  party is  prohibited  or limited by law, the Company has agreed to
make the  maximum  contribution  with  respect to any amounts for which it would
otherwise be liable under such  indemnification  provision to the fullest extent
permitted by law.



                                      -24-





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

                                  LEGAL MATTERS

         Certain  legal  matters with respect to the validity of the  securities
offered  hereby  will be  passed  upon  for the  Company  by  Testa,  Hurwitz  &
Thibeault, LLP, Boston, Massachusetts.

                                     EXPERTS

         The Company's  balance sheets as of December 31, 1996 and June 30, 1996
and 1995 and the related statements of loss, changes in stockholders' equity and
cash flows for the six months  ended  December 31, 1996 and each of the years in
the three year period  ended June 30, 1996  incorporated  by  reference  in this
Prospectus, have been audited by Wolf & Company, P.C., independent auditors, and
are  incorporated  in  reliance  on the  report  of such  firm,  given  on their
authority as experts in accounting and auditing.

         Superior's  balance  sheets as of  December  31,  1996 and 1995 and the
related statements of earnings, retained earnings and cash flows for each of the
years in the three year period ended December 31, 1996 incorporated by reference
in this  Prospectus,  have  been  audited  by Grant  Thornton  LLP,  independent
auditors,  and are incorporated in reliance on the report of such firm, given on
their authority as experts in accounting and auditing.

         Able's balance  sheets as of June 30, 1996,  December 31, 1995 and 1994
and the related statements of operations, division equity and cash flows for the
periods ended June 30, 1996,  December 31, 1995,  1994 and 1993  incorporated by
reference in this  Prospectus,  have been audited by Feldman Radin & Co.,  P.C.,
independent  auditors,  and are  incorporated  in reliance on the report of such
firm, given on their authority as experts in accounting and auditing.

                      DISCLOSURE OF COMMISSION POSITION ON
                 INDEMNIFICATION FOR SECURITIES ACT LIABILITIES

         Insofar as indemnification for liabilities arising under the Securities
Act may be  permitted to  directors,  officers  and  controlling  persons of the
Company pursuant to the foregoing provisions, 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  Securities
Act and will be governed by the final adjudication of such issue.



                                      -25-





                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

         The following table sets forth an estimate of the expenses  expected to
be incurred in connection  with the issuance and  distribution of the securities
being registered, other than underwriting compensation:

   
Registration Fee -- Securities and Exchange Commission..................$  1,901
Nasdaq SmallCap Market additional listing fee...........................   7,500
Boston Stock Exchange additional listing fee............................   5,000
Blue Sky Fees and Expenses..............................................   1,000
Accounting Fees and Expenses............................................   2,000
Legal Fees and Expenses.................................................  30,000
Transfer Agent Fees and Expenses........................................   1,000
Miscellaneous...........................................................   6,599
                                                                        --------
         TOTAL..........................................................$ 55,000
                                                                        ========
    


ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

         (A) THE COMPANY IS A DELAWARE CORPORATION.  SECTION 145 OF THE DELAWARE
GENERAL  CORPORATION LAW, AS AMENDED,  PROVIDES IN REGARD TO  INDEMNIFICATION OF
DIRECTORS AND OFFICERS AS FOLLOWS:

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


                                      II-1




         (b) A corporation  may indemnify any person who was or is a party or is
threatened to be made a party to any threatened,  pending or completed action or
suit by or in the right of the corporation to procure a judgment in its favor by
reason of the fact that he is or was a director,  officer,  employee or agent of
the  corporation,  or is or was serving at the request of the  corporation  as a
director, officer, employee or agent of another corporation,  partnership, joint
venture,  trust or other enterprise against expenses (including attorneys' fees)
actually  and  reasonably  incurred  by him in  connection  with the  defense or
settlement  of such  action or suit if he acted in good faith and in a manner he
reasonably  believed  to be in or not  opposed  to  the  best  interests  of the
corporation and except that no  indemnification  shall be made in respect of any
claim,  issue or matter as to which such person  shall have been  adjudged to be
liable  to the  corporation  unless  and only to the  extent  that the  Court of
Chancery or the court in which such action or suit was brought  shall  determine
upon application that,  despite the adjudication of liability but in view of all
the circumstances of the case, such person is fairly and reasonably  entitled to
indemnity  for such  expenses  which the Court of  Chancery  or such other court
shall deem proper.

         (c) To the extent  that a  director,  officer,  employee  or agent of a
corporation  has been  successful  on the merits or  otherwise in defense of any
action,  suit  or  proceeding  referred  to in  subsections  (a) and (b) of this
section,  or in  defense  of any  claim,  issue or matter  therein,  he shall be
indemnified against expenses (including attorneys' fees) actually and reasonably
incurred by him in connection therewith.

         (d) Any  indemnification  under subsections (a) and (b) of this section
(unless ordered by a court) shall be made by the corporation  only as authorized
in the specific case upon a determination that  indemnification of the director,
officer, employee or agent is proper in the circumstances because he has met the
applicable  standard  of conduct  set forth in  subsections  (a) and (b) of this
section.  Such  determination  shall be made (1) by the board of  directors by a
majority  vote of a quorum  consisting of directors who were not parties to such
action, suit or proceeding, or (2) if such a quorum is not obtainable,  or, even
if obtainable a quorum of  disinterested  directors so directs,  by  independent
legal counsel in a written opinion, or (3) by the stockholders.

         (e) Expenses  (included  attorneys'  fees)  incurred  by an  officer or
director in  defending  any civil,  criminal,  administrative  or  investigative
action suit or proceeding may be paid by the corporation in advance of the final
disposition of such action, suit or proceeding upon receipt of an undertaking by
or on  behalf of such  director  or  officer  to repay  such  amount if it shall
ultimately  be  determined  that he is not  entitled  to be  indemnified  by the
corporation as authorized in this section.  Such expenses (including  attorneys'
fees) incurred by other  employees and agents may be so paid upon such terms and
conditions, if any, as the board of directors deems appropriate.


                                      II-2




         (f) The  indemnification  and  advancement of expenses  provided by, or
granted  pursuant to, the other  subsections of this section shall not be deemed
exclusive  of any  other  rights  to  which  those  seeking  indemnification  or
advancement  of expenses  may be entitled  under any bylaw,  agreement,  vote of
stockholders or disinterested  directors or otherwise,  both as to action in his
official  capacity  and as to action in  another  capacity  while  holding  such
office.

         (g) A corporation  shall have power to purchase and maintain  insurance
on behalf of any person who is or was a director,  officer, employee or agent of
the  corporation,  or is or was serving at the request of the  corporation  as a
director, officer, employee or agent of another corporation,  partnership, joint
venture,  trust or other enterprise  against any liability  asserted against him
and incurred by him in any such capacity,  or arising out of his status as such,
whether or not the  corporation  would have the power to  indemnify  him against
such liability under this section.

         (h) For purposes of this section, references to "the corporation" shall
include, in addition to the resulting corporation,  any constituent  corporation
(including  any  constituent of a constituent)  absorbed in a  consolidation  or
merger which, if its separate existence had continued,  would have had power and
authority to indemnify its directors,  officers, and employees or agents so that
any person who was a director,  officer,  employee or agent of such  constituent
corporation, or is or was serving at the request of such constituent corporation
as a director,  officer, employee or agent of another corporation,  partnership,
joint venture, trust or other enterprise, shall stand in the same position under
this section with respect to the resulting or surviving  corporation as he would
have with respect to such constituent  corporation if its separate existence had
continued.

         (i) For purposes of this  section,  references  to "other  enterprises"
shall include  employee  benefit plans;  references to "fines" shall include any
excise taxes assessed on a person with respect to any employee benefit plan; and
references  to  "serving at the request of the  corporation"  shall  include any
service as a  director,  officer,  employee  or agent of the  corporation  which
imposes duties on, or involves services by, such director, officer, employee, or
agent  with  respect  to  an  employee   benefit  plan,  its   participants   or
beneficiaries;  and a  person  who  acted  in  good  faith  and in a  manner  he
reasonably  believed to be in the interest of the participants and beneficiaries
of an  employee  benefit  plan  shall be deemed to have  acted in a manner  "not
opposed  to the  best  interests  of the  corporation"  as  referred  to in this
section.

         (j) The  indemnification  and  advancement of expenses  provided by, or
granted  pursuant  to,  this  section  shall,  unless  otherwise  provided  when
authorized or ratified, continue as to a person who has ceased to be a director,
officer,  employee  or agent  and  shall  inure  to the  benefit  of the  heirs,
executors and administrators of such a person."


                                      II-3



         (B) ARTICLE 9 OF THE COMPANY'S  CERTIFICATE OF  INCORPORATION  CONTAINS
THE  FOLLOWING  PROVISION  RELATING  TO THE  INDEMNIFICATION  OF  DIRECTORS  AND
OFFICERS:

         "To the maximum  extent  permitted by Section  102(b)(7) of the General
Corporation  Law of  Delaware,  a  director  of this  Corporation  shall  not be
personally  liable to the Corporation or its  stockholders  for monetary damages
for breach of fiduciary  duty as a director,  except for  liability  (i) for any
breach of the director's duty of loyalty to the Corporation 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."

         (C)  ARTICLE  VII OF  THE  COMPANY'S  BY-LAWS  CONTAINS  THE  FOLLOWING
PROVISIONS RELATING TO INDEMNIFICATION OF OFFICERS AND DIRECTORS:

         "Reference is made to Section 145 and any other relevant  provisions of
the General  Corporation Law of the State of Delaware.  Particular  reference is
made to the  class of  persons,  hereinafter  called  "Indemnitees,"  who may be
indemnified by a Delaware corporation pursuant to the provisions of such Section
145,  namely,  any person or the heirs,  executors,  or  administrators  of such
person,  who  was or is a party  or is  threatened  to be  made a  party  to any
threatened,  pending or completed  action,  suit, or proceeding,  whether civil,
criminal,  administrative,  or  investigative,  by  reason of the fact that such
person is or was a director,  officer, employee, or agent of such corporation or
is or was serving at the  request of such  corporation  as a director,  officer,
employee,  or agent of such  corporation  or is or was serving at the request of
such  corporation  as  a  director,   officer,  employee  or  agent  of  another
corporation,  partnership,  joint  venture,  trust,  or  other  enterprise.  The
Corporation  shall, and is hereby  obligated to, indemnify the Indemnitees,  and
each of them in each and every  situation  where the Corporation is obligated to
make such indemnification  pursuant to the aforesaid statutory  provisions.  The
Corporation shall indemnify the Indemnitees, and each of them, in each and every
situation where, under the aforesaid  statutory  provisions,  the Corporation is
not  obligated,  but is  nevertheless  permitted  or  empowered,  to  make  such
indemnification,  it being understood that,  before making such  indemnification
with respect to any situation  covered under this sentence,  (i) the Corporation
shall  promptly make or cause to be made,  by any of the methods  referred to in
Subsection  (d)  of  such  Section  145,  a  determination  as to  whether  each
Indemnitee acted in good faith and in a manner he reasonably  believed to be in,
or not opposed to, the best  interests of the  Corporation,  and, in the case of
any criminal action or proceeding,  had no reasonable  cause to believe that his
conduct was unlawful, and (ii) that no such indemnification shall be made unless
it is  determined  that such  Indemnitee  acted in good faith and in a manner he
reasonably  believed  to be in, or not  opposed  to, the best  interests  of the
Corporation,  and,  in the case of any  criminal  action or  proceeding,  had no
reasonable cause to believe that his conduct was unlawful."



                                      II-4




ITEM 16  EXHIBITS.

         The following  exhibits,  required by Item 601 of  Regulation  S-K, are
filed  as  a  part  of  this  Registration  Statement.  Exhibit  numbers,  where
applicable,  in the left column  correspond  to those of Item 601 of  Regulation
S-K.

EXHIBIT NO.                           ITEM AND REFERENCE
- -----------                           ------------------

     4a       --  Specimen Common Stock Certificate  (filed as Exhibit 4a to the
                  Company's  Registration Statement on Form S-18, No. 33-31836-B
                  and incorporated by reference).

     4b       --  Certificate of Designations,  Preferences and Rights of Series
                  A Preferred Stock of the Company (filed as Exhibit 4.13 to the
                  Company's  Current  Report on Form 8-K dated June 18, 1997 and
                  incorporated by reference).

     4c       --  Securities  Purchase  Agreement  dated June 16, 1997 among the
                  Company and the purchasers of Series A Preferred  Stock (filed
                  as Exhibit 4.14 to the  Company's  Current  Report on Form 8-K
                  dated June 18, 1997 and incorporated by reference).

     4d       --  Registration  Rights  Agreement  dated June 16, 1997 among the
                  Company and the purchasers of Series A Preferred  Stock (filed
                  as Exhibit 4.15 to the  Company's  Current  Report on Form 8-K
                  dated June 18, 1997 and incorporated by reference).

     4e       --  Form of Common  Stock  Purchase  Warrant  dated June 18,  1997
                  issued by the Company to the  purchasers of Series A Preferred
                  Stock (filed as Exhibit 4.16 to the Company's  Current  Report
                  on  Form  8-K  dated  June  18,  1997  and   incorporated   by
                  reference).

     4f       --  Certificate of Designations,  Preferences and Rights of Series
                  B Preferred Stock of the Company (filed as Exhibit 4.17 to the
                  Company's  Current  Report on Form 8-K dated June 18, 1997 and
                  incorporated by reference).

     4g       --  Securities  Purchase Agreement dated June 17, 1997 between the
                  Company and Julius Baer  Securities  Inc. as agent for certain
                  non-U.S.  persons  (filed  as  Exhibit  4.18 to the  Company's
                  Current   Report  on  Form  8-K  dated   June  18,   1997  and
                  incorporated by reference).

     4h       --  Registration  Rights Agreement dated June 17, 1997 between the
                  Company and Julius Baer  Securities  Inc. as agent for certain
                  non-U.S.  persons  (filed  as  Exhibit  4.19 to the  Company's
                  Current   Report  on  Form  8-K  dated   June  18,   1997  and
                  incorporated by reference).

     4i       --  Bridge  Financing  Purchase  Agreement  dated  June  16,  1997
                  between the Company and Coutts & Co. AG (filed as Exhibit 4.12
                  to the  Company's  Current  Report on Form 8-K dated  June 18,
                  1997 and incorporated by reference).

     5        --  Legal  Opinion  of Testa,  Hurwitz  &  Thibeault,  LLP  (filed
                  herewith).

   
     23a      --  Consent of Wolf &  Company,  P.C.  dated  September  11,  1997
                  (filed herewith).

     23b      --  Consent of Grant Thornton LLP dated  September 11, 1997 (filed
                  herewith).

     23c      --  Consent of Feldman Radin & Co., P.C. dated  September 10, 1997
                   (filed herewith).
    

     23d      --  Consent of Testa, Hurwitz & Thibeault, LLP (see Exhibit 5).




                                      II-5




   
     24       --  Power of Attorney empowering  Dhananjay G. Wadekar and Indu A.
                  Muni and each of them to execute this  Registration  Statement
                  (previously filed)
    

ITEM 17.  UNDERTAKINGS.

         The undersigned registrant hereby undertakes:

         (a) (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
Securities Act of 1933, each such post-effective amendment shall be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

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

             (4) That,  for  purposes of  determining  any  liability  under the
Securities Act of 1933, each filing of the  registrant's  annual report pursuant
to section  13(a) or 15(d) of the  Securities  Exchange Act of 1934 (and,  where
applicable,  each filing of an employee benefit plan's annual report pursuant to
section 15(d) of the Securities  Exchange Act of 1934) 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.

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

         (c) The undersigned  registrant  hereby undertakes that for purposes of
determining  any liability  under the Securities  Act of 1933,  the  information
omitted from the form of


                                      II-6




prospectus  filed as part of this  registration  statement in reliance upon Rule
430A, and contained in a form of prospectus filed by the registrant  pursuant to
Rule 424(b)(1) or (4) or 497(h),  under the Securities Act shall be deemed to be
part of this registration statement as of the time it was declared effective.

         (d) The undersigned  registrant  hereby undertakes that for the purpose
of  determining   any  liability   under  the  Securities  Act  of  1933,   each
post-effective  amendment that contains a form of prospectus  shall be deemed to
be a new registration  statement relating to the securities offered therein, and
the offering of such  securities  at that time shall be deemed to be the initial
bona fide offering thereof.



                                      II-7






                                   SIGNATURES

   
         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
registrant certifies that it has reasonable grounds to believe that it meets all
of the  requirements  for filing on Form S-3 and has duly caused this  Amendment
No.1 to  Registration  Statement  on Form S-3 to be signed on its  behalf by the
undersigned, thereunto duly authorized in the City of Cambridge, Commonwealth of
Massachusetts on September 11, 1997.
    

                                                DYNAGEN, INC.

   
                                                By: /s/ Dhananjay G. Wadekar
                                                   -----------------------------
                                                Dhananjay G. Wadekar
                                                Chairman of the Board, Executive
                                                Vice President 
    


                                      II-8





   
         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
Amendment No. 1 to  Registration  Statement on Form S-3 has been signed below by
the following  persons on behalf of the  Registrant and in the capacities and on
the dates indicated.


<TABLE>
<CAPTION>

 Name                                        Capacity                                    Date


<S>                                        <C>                                         <C>
/s/ Dhananjay G. Wadekar                    Chairman of the Board, Executive            September 11, 1997
- -----------------------------------------   Vice President and Director
Dhananjay G. Wadekar                        


               *                            President, Chief Executive Officer,         September 11, 1997
- -----------------------------------------   Treasurer, (Principal Executive,  
Dr. Indu A. Muni                            Financial and Accounting Officer) 
                                            and Director                      
                                            

               *                            Senior Vice President --                    September 11, 1997
- -----------------------------------------   Technology and Director
Dr. F. Howard Schneider                     


               *                            Director                                    September 11, 1997
- -----------------------------------------
Dr. Ian R. Ferrier


               *                            Director                                    September 11, 1997
- -----------------------------------------
Steven Georgiev


                                            Director                                    
- -----------------------------------------
Dr. Michael Sorell


* By: /s/ Dhananjay G. Wadekar
     ------------------------------------
     Dhananjay G. Wadeker
     Attorney-in-fact
</TABLE>

    


                                      II-9





                                INDEX TO EXHIBITS

Exhibit
Number                         Description of Exhibit
- ------                         ----------------------


   4a             Specimen Common Stock Certificate  (filed as Exhibit 4a to the
                  Company's  Registration Statement on Form S-18, No. 33-31836-B
                  and incorporated by reference).

   4b             Certificate of Designations,  Preferences and Rights of Series
                  A Preferred Stock of the Company (filed as Exhibit 4.13 to the
                  Company's  Current  Report on Form 8-K dated June 18, 1997 and
                  incorporated by reference).

   4c             Securities  Purchase  Agreement  dated June 16, 1997 among the
                  Company and the purchasers of Series A Preferred  Stock (filed
                  as Exhibit 4.14 to the  Company's  Current  Report on Form 8-K
                  dated June 18, 1997 and incorporated by reference).

   4d             Registration  Rights  Agreement  dated June 16, 1997 among the
                  Company and the purchasers of Series A Preferred  Stock (filed
                  as Exhibit 4.15 to the  Company's  Current  Report on Form 8-K
                  dated June 18, 1997 and incorporated by reference).

   4e             Form of Common  Stock  Purchase  Warrant  dated June 18,  1997
                  issued by the Company to the  purchasers of Series A Preferred
                  Stock (filed as Exhibit 4.16 to the Company's  Current  Report
                  on  Form  8-K  dated  June  18,  1997  and   incorporated   by
                  reference).

   4f             Certificate of Designations,  Preferences and Rights of Series
                  B Preferred Stock of the Company (filed as Exhibit 4.17 to the
                  Company's  Current  Report on Form 8-K dated June 18, 1997 and
                  incorporated by reference).

   4g             Securities  Purchase Agreement dated June 17, 1997 between the
                  Company and Julius Baer  Securities  Inc. as agent for certain
                  non-U.S.  persons  (filed  as  Exhibit  4.18 to the  Company's
                  Current   Report  on  Form  8-K  dated   June  18,   1997  and
                  incorporated by reference).

   4h             Registration  Rights Agreement dated June 17, 1997 between the
                  Company and Julius Baer  Securities  Inc. as agent for certain
                  non-U.S.  persons  (filed  as  Exhibit  4.19 to the  Company's
                  Current   Report  on  Form  8-K  dated   June  18,   1997  and
                  incorporated by reference).

   4i             Bridge  Financing  Purchase  Agreement  dated  June  16,  1997
                  between the Company and Coutts & Co. AG (filed as Exhibit 4.12
                  to the  Company's  Current  Report on Form 8-K dated  June 18,
                  1997 and incorporated by reference).








   5              Legal  Opinion  of Testa,  Hurwitz  &  Thibeault,  LLP  (filed
                  herewith).

   
   23a            Consent of Wolf &  Company,  P.C.  dated  September  11,  1997
                  (filed herewith).

   23b            Consent of Grant Thornton LLP dated  September 11, 1997 (filed
                  herewith).


   23c            Consent of Feldman Radin & Co.,  P.C. dated September 10, 1997
                  (filed herewith).
    
   23d            Consent of Testa, Hurwitz & Thibeault, LLP (see Exhibit 5).

   
   24             Power of Attorney empowering  Dhananjay G. Wadekar and Indu A.
                  Muni and each of them to execute this  Registration  Statement
                  (previously filed).
    




                                                                       EXHIBIT 5


   
                                                       September 10, 1997
    


DynaGen, Inc.
99 Erie Street
Cambridge, MA  02139

         RE:      Form S-3 Registration Statement
                  -------------------------------
Ladies and Gentlemen:

   
         We  are  counsel  to  DynaGen,   Inc.,  a  Delaware   corporation  (the
"Company"),  and have represented the Company in connection with the preparation
and filing of the Company's  Registration Statement on Form S-3, as amended (the
"Registration Statement"),  relating to the proposed resale from time to time of
up to 15,303,000  shares of the Company's Common Stock, par value $.01 per share
(the  "Shares"),   by  the  stockholders   listed  under  the  heading  "Selling
Stockholders"  in  the  Registration  Statement  (the  "Selling  Stockholders").
12,100,000  of the Shares are issuable  upon  conversion of 41,000 shares of the
Company's  Series A  Preferred  Stock,  par value $.01 per share (the  "Series A
Preferred Stock"),  issued to certain of the Selling Stockholders;  1,500,000 of
the Shares are issuable upon conversion of 7,500 shares of the Company's  Series
B Preferred  Stock,  par value $.01 per share (the "Series B Preferred  Stock"),
issued to one of the Selling  Stockholders;  328,000 of the Shares are  issuable
upon the exercise of Common  Stock  Purchase  Warrants  dated June 18, 1997 (the
"Warrants") issued to certain of the Selling Stockholders; 375,000 of the Shares
were issued  concurrently  with the Company's June 1997 private placement of its
Series B Preferred  Stock and its  Subordinated  Note due  September 30, 1997 to
certain of the Selling Stockholders;  and 1,000,000 of the shares were issued to
a Selling  Stockholder in consideration  of services  rendered to the Company by
such Selling Stockholder.
    

         We have  reviewed the corporate  proceedings  taken by the Company with
respect to the  authorization  of the issuance of the Series A Preferred  Stock,
the Series B Preferred Stock, the Warrants and the Shares. We have also examined
and relied upon originals or copies, certified or otherwise authenticated to our
satisfaction,   of  all  corporate  records,  documents,   agreements  or  other
instruments  of the  Company  and the  Selling  Stockholders  and have  made all
investigations  of law  and  have  discussed  with  the  Company's  and  Selling
Stockholders'  representatives  all  questions  of  fact  that  we  have  deemed
necessary or appropriate.

         Based upon and subject to the foregoing, we are of the opinion that any
currently outstanding Shares are, and any Shares issuable upon future conversion
of the  Series A  Preferred  Stock or Series B  Preferred  Stock or upon  future
exercise of the Warrants, when issued in accordance with the terms of the Series
A Preferred Stock, the Series B Preferred Stock or the Warrants, as the case may
be, will be, validly issued, fully paid and non-assessable.









DYNAGEN, INC.

   
SEPTEMBER 10, 1997
PAGE 2
    



         We hereby  consent  to the  filing of this  opinion as Exhibit 5 to the
Registration  Statement  and to the  reference  to our  firm  in the  Prospectus
contained in the Registration Statement under the caption "Legal Matters."

                                          Very truly yours,


                                          TESTA, HURWITZ & THIBEAULT, LLP






                          INDEPENDENT AUDITORS' CONSENT



   
We consent to the incorporation by reference in this  Registration  Statement of
DynaGen,  Inc. on Form S-3, as amended,  of our report dated  February 14, 1997,
except  for Note 14 as to which  the date is  March 7,  1997,  appearing  in the
Transition  Report on Form 10-K of DynaGen,  Inc. for the six-month  period from
July 1, 1996 to  December  31,  1996,  as amended  and to the  incorporation  by
reference of our report dated July 24, 1996,  except for Note 12 as to which the
date is August 19, 1996, appearing in the Annual Report on Form 10-K of DynaGen,
Inc. for the fiscal year ended June 30, 1996.  We also consent to the  reference
to us under the  heading  "Experts"  in this  Prospectus,  which is part of this
Registration Statement.

                                                        /s/ Wolf & Company, P.C.
                                                            WOLF & COMPANY, P.C.

Boston, Massachusetts
September 11, 1997
    





   
We have issued our report dated  January 24, 1997,  accompanying  the  financial
statements  and schedules of Superior  Pharmaceutical  Company  contained in the
Registration   Statement  and   Prospectus.   We  consent  to  the  use  of  the
aforementioned reports in the Registration Statement and Prospectus, as amended,
and to the use of our name as it appears under the caption "Experts".
    


/s/ Grant Thornton LLP
- ----------------------
Grant Thornton

   
Cincinnati, Ohio
September 11, 1997
    







                                                                     EXHIBIT 23c




                          INDEPENDENT AUDITORS' CONSENT


   
We consent to the incorporation by reference in this  Registration  Statement on
Form S-3, of DynaGen,  Inc. of our report  dated  August 19, 1996  appearing  in
DynaGen, Inc.'s Current Report on Form 8-K dated August 19, 1996, as amended. We
also  consent  to  the  reference  to us  under  the  heading  "Experts"  in the
Prospectus, which is part of this Registration Statement.
    





                                                  /s/ FELDMAN RADIN & CO., P.C.


   
New York, New York
September 10, 1997
    




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