Exhibit 3.1



                          CERTIFICATE OF INCORPORATION
                                       OF
                         PHARMACEUTICAL RESOURCES, INC.


                                    ARTICLE I

     The name of the corporation is Pharmaceutical  Resources, Inc. (hereinafter
the "Corporation").

                                   ARTICLE II

     The registered office of the Corporation  within the State of New Jersey is
located  at 14  Leslie  Place,  Tenafly,  New  Jersey  07670.  The  name  of the
Corporation's registered agent at such address is Mr. Stephen A. Ollendorff.

                                   ARTICLE III

     The  purpose of the  Corporation  is to engage in any  activity  within the
purposes for which  corporations may be organized under the "New Jersey Business
Corporation Act," N.J.S.A. 14A:l-1 et seq.

                                   ARTICLE IV

     (a) The  Corporation  is authorized to issue  60,000,000  shares of capital
stock which shall be designated the Common Stock, par value $.01 per share. Each
holder of Common Stock of the  Corporation  entitled to vote shall have one vote
for each share held thereof.

     (b) The  Corporation  is  authorized to issue  6,000,000  shares of capital
stock which shall be designated the Preferred Stock, par value $.0001 per share.

     The  Preferred  Stock  may be issued  in one or more  series.  The Board of
Directors is hereby  authorized  to issue the shares of Preferred  Stock in such
series and to fix from time to time before  issuance  the number of shares to be
included in any series and the  designation,  relative  rights,  preferences and
limitations  of all  shares  of such  series.  The  authority  of the  Board  of
Directors  with  respect to each series  shall  include,  without  limiting  the
generality of the foregoing, the determination of any or all of the following:

          (i)  The  number  of  shares  of any  series  and the  designation  to
     distinguish the shares of such series from the shares of all other series;


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          (ii) The voting  powers,  if any, and whether  such voting  powers are
     full or limited in such series;

          (iii) The redemption  provisions,  if any,  applicable to such series,
     including the redemption price or prices to be paid;

          (iv) Whether dividends,  if any, shall be cumulative or noncumulative,
     the dividend rate or rates of such series and the manner of determining the
     same, and the dates and preferences of dividends on such series;

          (v) The  rights  of such  series  upon the  voluntary  or  involuntary
     dissolution of, or upon any distribution of the assets of, the Corporation;

          (vi) The  provisions,  if any,  pursuant  to which the  shares of such
     series are convertible into, or exchangeable for, shares of any other class
     or classes or of any other series of the same or any other class or classes
     of  shares,  or any  other  security,  of  the  Corporation  or  any  other
     corporation,  and the price or prices or the rates of  exchange  applicable
     thereto;

          (vii)  The  right,  if  any,  to  subscribe  for  or to  purchase  any
     securities of the Corporation or any other corporation;

          (viii) The  provisions,  if any, of a sinking fund  applicable to such
     series; and

          (ix) Any other  relative,  participating,  optional  or other  special
     powers, preferences,  rights, qualifications,  limitations, or restrictions
     thereof;  all as  shall be  determined  from  time to time by the  Board of
     Directors and shall be stated in said  resolution or resolutions  providing
     for the issuance of such Preferred Stock (a "Preferred Stock Designation").

     (c) Except as may be provided in this  Certificate of  Incorporation  or by
the Board of Directors in a Preferred  Stock  Designation  or by law, the Common
Stock shall have the  exclusive  right to vote for the election of directors and
for all other purposes,  and holders of Preferred Stock shall not be entitled to
receive notice of any meeting of  shareholders at which they are not entitled to
vote or consent.

     (d) The Corporation shall be entitled to treat the person in whose name any
share of its capital  stock is registered as the owner thereof for all purposes,
and shall not be bound to recognize any equitable or other claim to, or interest
in, such share on the part of any other person,  whether or not the  Corporation
shall have notice thereof, except as expressly provided by applicable law.


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                                    ARTICLE V

     (a) The Board of  Directors  shall have the power to remove  directors  for
cause and to suspend directors pending a final  determination  that cause exists
for removal.

     (b)  Subject to the rights of the holders of any class or series of capital
stock  having  a  preference  over the  Common  Stock  as to  dividends  or upon
liquidation to elect  additional  directors  under specific  circumstances,  the
number of directors  which shall  constitute the whole Board of Directors of the
Corporation shall not be more than fifteen,  the exact number of directors to be
determined  from time to time by the Board of Directors in  accordance  with the
By-Laws of the  Corporation.  Any decrease in the number of  directors  will not
shorten the term of any incumbent director.

     (c)  Commencing  with  the  directors  elected  at the  annual  meeting  of
shareholders in 1991, the directors,  other than those who may be elected by the
holders  of any class or series of stock  having a  preference  over the  Common
Stock as to dividends or upon  liquidation,  shall be classified with respect to
the time for which they  severally  hold  office into three  classes,  as nearly
equal in number as possible, as shall be provided in the manner specified in the
By-Laws of the  Corporation.  One class shall be  originally  elected for a term
expiring at the annual meeting of shareholders to be held in 1992, another class
shall be  originally  elected  for a term  expiring  at the  annual  meeting  of
shareholders  to be held in 1993, and another class shall be originally  elected
for a term expiring at the annual  meeting of  shareholders  to be held in 1994,
with the members of each class to hold office until their successors are elected
and qualified.  Commencing at the 1992 annual meeting of the shareholders of the
Corporation,   and  at  each  succeeding  annual  meeting  of  the  shareholders
thereafter,  the successors of the class of directors whose term expires at that
meeting shall be elected by plurality  vote of all votes cast at such meeting to
hold office for a term expiring at the annual  meeting of  stockholders  held in
the third year following the year of their election.

     (d) Notwithstanding anything contained in this Certificate of Incorporation
to the  contrary,  the  affirmative  vote of the  shareholders  holding at least
sixtysix and two-thirds  percent of the outstanding  shares of the Voting Stock,
voting together as a single class,  shall be required to alter,  change,  amend,
repeal, or adopt any provision inconsistent with, this Article Fifth.

     (e) For the purpose of this Article  Fifth,  "Voting  Stock" shall mean the
outstanding  shares  of  capital  stock  of the  Corporation  entitled  to  vote
generally in the election of directors.  In any vote required by or provided for
in this Article Fifth, each share of Voting Stock shall have the number of votes
granted to it generally in the election of directors.


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                                   ARTICLE VI

     The number of  directors  constituting  the first Board of Directors of the
Corporation  shall be one and the name of the person serving as such director is
Kenneth I. Sawyer,  whose address is c/o One Ram Ridge Road, Spring Valley,  New
York 10977.

                                   ARTICLE VII

     The sole  incorporator  of the  Corporation  is  Kenneth I.  Sawyer,  whose
address is c/o One Ram Ridge Road Spring Valley, New York 10977.

                                  ARTICLE VIII

     To the  fullest  extent  permitted  by law,  no  director or officer of the
Corporation  shall be personally  liable to the Corporation or its shareholders.
Neither the amendment or repeal of this Article Eighth,  nor the adoption of any
provision of this  Certificate of Incorporation  inconsistent  with this Article
Eighth, shall eliminate or reduce the protection afforded by this Article Eighth
to a  director  or  officer of the  Corporation  in respect to any matter  which
occurred,  or any cause of  action,  suit or claim  which  but for this  Article
Eighth  would  have  accrued  or  arisen,  prior to such  amendment,  repeal  or
adoption.

                                   ARTICLE IX

     (a) The  Corporation  shall,  to the fullest extent  permitted by law, from
time to time,  indemnify  directors  and  officers  of the  Corporation  against
expenses  and  liabilities  incurred  by such  persons  in  connection  with any
proceeding  involving  such  person  as a party or  witness  by  reason  of such
persons' serving as an officer or director of the Corporation.

     (b) The  indemnification and advancement of expenses provided by or granted
pursuant to this  Article  Ninth  shall not exclude any other  rights to which a
person may be entitled under the Certificate of Incorporation,  the By-Laws,  an
agreement, vote of shareholders, or otherwise.

     (c)  Expenses  incurred  by a  director  or officer  in  connection  with a
proceeding  shall be paid in advance of the final  disposition of the proceeding
upon  receipt  of an  undertaking  by or on behalf of such  person to repay such
amount unless it shall  ultimately be determined that such person is entitled to
be  indemnified  as  provided  in  this  Article  Ninth,   the   Certificate  of
Incorporation, the By-Laws, by vote of shareholders, or otherwise.

     (d) The Corporation shall have the power to purchase and maintain insurance
on behalf of any  director  or officer  against  any  expenses  incurred  in any
proceeding  in which  such  person is a party or a witness  and any  liabilities
asserted  against such  person,  whether or not the  Corporation  would have the
power to indemnify such person against such

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expenses and liabilities under this Article Ninth or otherwise.  The Corporation
may purchase such insurance from, or such insurance may be reinsured in whole or
in part by, an insurer owned by or otherwise affiliated with the Corporation.

     (e) Neither the amendment or repeal of this Article Ninth, nor the adoption
of any provision of this  Certificate of  Incorporation  inconsistent  with this
Article Ninth,  shall  eliminate or reduce the protection or rights  afforded by
this Article Ninth to any person in respect to any matter which occurred, or any
claim or  proceeding  which but for this  Article  Ninth would have been made or
arisen, prior to such amendment, repeal or adoption.

     IN WITNESS  WHEREOF,  the sole  incorporator,  being over eighteen years of
age,  has signed this  Certificate  of  Incorporation  on this 29th day of July,
1991.

                                              By /s/ Kenneth I. Sawyer
                                                 ----------------------- 
                                                     Kenneth I. Sawyer




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