EXHIBIT 3.1

                                                               STATE OF DELAWARE
                                                       SECRETARY OF CORPORATIONS
                                                        FILED 5:30 PM 05/09/2003

                          CERTIFICATE OF INCORPORATION

                                       OF

                         PHARMACEUTICAL RESOURCES, INC.


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

     SECOND:      The  address  of the  Corporation's  registered  office in the
State  of  Delaware  is  2711  Centerville  Road,  Suite  400,  in the  City  of
Wilmington, County of New Castle 19808. The name of its registered agent at that
address is Corporation Service Company.

     THIRD:       The purpose of the  Corporation is to engage in any lawful act
or  activity  for  which   corporations  may  be  organized  under  the  General
Corporation Law of the State of Delaware (the "Delaware Code").

     FOURTH:      (A)    The total  number of shares of  capital  stock that the
Corporation  shall have  authority to issue is 96,000,000,  of which  90,000,000
shall be  shares  of common  stock  having a par  value of $0.01 per share  (the
"Common Stock") and 6,000,000 shares shall be shares of preferred stock having a
par value of $0.0001 per share (the "Preferred Stock").

                  (B)    The  Preferred  Stock  may be  issued  in  one or  more
classes or series.  The board of directors of the  Corporation  (the "Board") is
hereby  authorized  to issue,  in its sole  discretion,  the shares of Preferred
Stock in such  class or  series  and to fix,  from  time to time,  before  their
issuance,  the  number of shares to be  included  in any class or series and the
designation,  relative rights, preferences and limitations of all shares of such
class or series. The authority of the Board with respect to each class or series
of the Preferred  Stock 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 class or series
     and the  designation to distinguish the shares of such class or series from
     the shares of all other classes or series;

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

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

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


                         (v)      The  rights of such  class or 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 class or series are convertible  into, or exchangeable  for,
     shares of any other class or classes or of any other  series of the same or
     of any other  class or  classes of shares,  or any other  security,  of the
     Corporation or any other corporation or entity,  and the price or prices or
     the rates of exchange applicable thereto;

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

                         (viii)   The  provisions,  if any,  of a  sinking  fund
     applicable to such class or 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 and shall be stated in
said  resolution or  resolutions  providing  for the issuance of such  Preferred
Stock.

                  (C)    Except  as may  be  provided  in  this  Certificate  of
Incorporation,  by the Board in a Preferred  Stock  designation or by applicable
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  stockholders  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.

     FIFTH:       The name and mailing address of the incorporator are Marian E.
Gustafson,  c/o Kirkpatrick & Lockhart LLP, 599 Lexington  Avenue,  New York, NY
10022-6030.

     SIXTH:       (A)    The Board  shall  have the  power to  adopt,  amend and
repeal the By-laws of the Corporation.  The stockholders entitled to vote in the
election of directors may adopt  additional  By-laws and may amend or repeal any
By-law adopted by the Board.

                  (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 and/or upon liquidation, the number of directors that shall constitute
the entire  Board shall not be less than three nor more than 13, with the actual
number  of  directors  to be  determined  from  time  to time  by the  Board  in
accordance with this Certificate of  Incorporation  and pursuant to duly adopted
resolutions  of the Board.  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  Stockholders  in 2003,  the  directors,  other  than any who may be
elected by the holders of any class or series of stock having a preference  over
the Common Stock as to dividends  and/or upon  liquidation,  shall be classified

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with  respect  to the time for which  they  severally  hold  office  into  three
classes,  as nearly  equal in number as  possible.  The first class of directors
shall be elected for a term expiring at the Annual Meeting of Stockholders to be
held in 2006, the second class of directors shall be elected for a term expiring
at the Annual Meeting of  Stockholders to be held in 2004 and the third class of
directors  shall  be  elected  for a term  expiring  at the  Annual  Meeting  of
Stockholders  to be held in 2005,  with each of the members of the three classes
to hold  office  until  his or her  successor  is duly  elected  and  qualified.
Commencing  at the  2007  Annual  Meeting  of  the  Stockholders,  and  at  each
succeeding annual meeting of the stockholders thereafter,  the successors of the
class of directors  whose term expires at that meeting  shall be elected to hold
office for a term  expiring at the annual  meeting of  stockholders  held in the
third year following the year of their  election.  Any vacancy or  newly-created
directorship  resulting from any increase in the authorized  number of directors
may be filled by a majority of only those  directors  who were  directors of the
Company  immediately prior to such vacancy or newly-created  directorship,  even
though such directors may constitute less than a quorum,  or by a sole remaining
director.  Any  director  so  chosen  to  fill  a  vacancy  or  a  newly-created
directorship  shall hold office  until the next  election of the class for which
such  director  shall have been  chosen  and until  his/her  successor  shall be
elected and qualified.

                  (D)    Notwithstanding  anything contained in this Certificate
of  Incorporation  to the contrary,  the  affirmative  vote of the  stockholders
holding at least  sixty-six and two-thirds (66 2/3%) percent of the Voting Stock
(as defined  below),  voting  together as a single  class,  shall be required to
alter,  change,  amend,  repeal, or adopt any provision  inconsistent with, this
Article Sixth (including this Paragraph (D)).

                  (E)    For the purpose of this Article  Sixth,  "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  Sixth,  each share of Voting Stock shall have the
number of votes granted to it generally in the election of directors.

     SEVENTH:     Meetings of  stockholders  shall be held at such place,  in or
outside the State of Delaware, as may be designated by or in the manner provided
in the By-laws of the Corporation or, if not so designated, as determined by the
Board. Elections of directors need not be by written ballot except as and to the
extent required by the By-laws of the Corporation.

     EIGHTH:      No director shall be personally  liable to the  Corporation or
its  stockholders  for monetary  damages for any breach of  fiduciary  duty as a
director,  except to the extent that such elimination or limitation of liability
is not  permitted  under the Delaware Code as in effect at the time of breach of
such fiduciary duty. Any amendment, modification or repeal of this Article or of
the  Delaware  Code  shall not  adversely  affect any right or  protection  of a
director of the  Corporation  with respect to any such breach of fiduciary  duty
occurring prior to the time of such amendment, modification or repeal.

     NINTH:       (A)    The Corporation  shall indemnify and hold harmless,  to
the fullest extent  permitted by the Delaware Code, each director and officer of
the  Corporation  who was or is,  or is  threatened  to be  made,  a party to or
otherwise  involved in any  threatened,  pending or  completed  action,  suit or
proceeding,   whether  civil,  criminal,   administrative  or  investigative  (a
"Proceeding"),  by reason of the fact  that  such  person is or was a  director,
officer,  employee  or  agent  of  the  Corporation,  or a  trustee,  custodian,
administrator,  committeeman  or fiduciary of any employee  benefit  plan,  or a
person serving another  corporation,  partnership,  joint venture,  trust, other
enterprise or nonprofit entity in any of the foregoing capacities at the request
of the  Corporation  (an  "Authorized  Representative"),  against  all  expenses
(including  attorneys' fees and disbursements),  liabilities,  judgments,  fines

                                      -3-


(including  excise taxes and penalties) and amounts paid in settlement  actually
and  reasonably  incurred by such  person in  connection  with such  Proceeding,
whether the basis of such person's  involvement  in the Proceeding is an alleged
act or omission in such person's capacity as an Authorized  Representative or in
another capacity while serving in such capacity,  or both. The Corporation shall
be  required  to  indemnify  an  incumbent  or former  director  or  officer  in
connection with a Proceeding  initiated by such person only if and to the extent
that such  Proceeding  was authorized by the Board or it is a civil suit by such
person to enforce rights to indemnification or advancement of expenses.

                  (B)    The   Corporation   shall  promptly  pay  all  expenses
(including  attorneys' fees and disbursements)  actually and reasonably incurred
by a director or officer of the Corporation in defending or appearing (otherwise
than as a  plaintiff)  in any  Proceeding  described  in  Paragraph  (A) of this
Article in advance of the final  disposition of such  Proceeding upon receipt of
an  undertaking  by or on behalf of such person to repay all amounts so advanced
if it shall ultimately be determined by a final,  unappealable judicial decision
that such person is not entitled to be indemnified  for such expenses under this
Article or otherwise.

                  (C)    The  Corporation  shall have the power to indemnify any
person who is or was an Authorized  Representative (other than current or former
officers or directors, who are covered by Paragraph (A) above) against any loss,
liability  and expense in  connection  with a  Proceeding,  and may pay expenses
incurred by such person in  connection  with such  Proceeding  in advance of the
final  disposition  of  the  Proceeding,  to the  fullest  extent  permitted  by
applicable law.

                  (D)    The  rights  to  indemnification   and  advancement  of
expenses  provided by or granted  pursuant to this Article  shall be presumed to
have been relied upon by directors and officers of the Corporation in serving or
continuing to serve the Corporation, shall continue as to a person who ceases to
be an  Authorized  Representative,  shall  inure to the  benefit  of the  heirs,
executors  and  administrators  of such  person,  and  shall be  enforceable  as
contract  rights.  Such rights shall not be deemed exclusive of any other rights
to which a person  seeking  indemnification  or  advancement  of expenses may be
entitled  under any  statute,  agreement,  the  Corporation's  By-laws,  vote of
stockholders or disinterested directors, or otherwise, both as to action in such
person's  official  capacity and as to action in another  capacity while holding
such office or position. The Corporation may enter into contracts to provide any
Authorized   Representative   with  specific  rights  to   indemnification   and
advancement of expenses,  which  contracts may confer rights and  protections to
the maximum extent permitted by applicable law. The Corporation may purchase and
maintain insurance, borrow money, create trust funds, pledge, mortgage or create
security interests in the assets of the Corporation, obtain letters of credit or
use other  means from time to time to ensure  payment of such  amounts as may be
necessary to perform the Corporation's  obligations under this Article or in any
such contract,  whether or not the Corporation would have the power to indemnify
an Authorized  Representative  against such loss,  liability  and expenses.  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.  The By-laws of the Corporation may contain  additional  provisions
implementing and supplementing the provisions of this Article.

                  (E)    Any amendment,  modification  or repeal of this Article
shall not  adversely  affect any right or protection of a director or officer of
the Corporation with respect to any act or omission  occurring prior to the time
of such amendment, modification or repeal.

     TENTH:       Any action  permitted or required to be taken at any annual or
special  meeting of the  stockholders  may be taken  without a meeting,  without

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prior  notice and  without a vote,  only if a consent or  consents  in  writing,
setting forth the action so taken,  shall be signed by the holders of all shares
of the Voting Stock.

                                      -5-


               The  undersigned  incorporator  makes  this  Certificate  for the
purpose of forming a corporation  pursuant to the General Corporation Law of the
State of Delaware,  and hereby  declares and certifies  that this is the act and
deed of the undersigned and that the facts stated herein are true.



Date: May 9, 2003                   /s/ Marian E. Gustafson
                                    ------------------------------
                                          Marian E. Gustafson
                                          Sole Incorporator


                                      -6-

                                                               State of Delaware
                                                              Secretary of State
                                                        Division of Corporations
                                                        Filed 1:13 PM 06/24/2003

                              CERTIFICATE OF MERGER

                                       OF

                         PHARMACEUTICAL RESOURCES, INC.
                            A New Jersey corporation

                                       AND

                         PHARMACEUTICAL RESOURCES, INC.
                             A Delaware corporation


          Pursuant to the  provisions of Section 252 of the General  Corporation
Law of the State of Delaware, it is hereby certified that:

          1.   The constituent business corporations participating in the merger
herein certified are:

               (i)    Pharmaceutical  Resources,  Inc.,  which  is  incorporated
under the laws of the State of New Jersey ("PRI NJ"); and

               (ii)   Pharmaceutical  Resources,  Inc.,  which  is  incorporated
under the laws of the State of Delaware ("PRI DE").

          2.   An  Agreement  and Plan of  Merger  has been  approved,  adopted,
certified,  executed  and  acknowledged  by  each of the  aforesaid  constituent
corporations  in accordance with the provisions of subsection (c) of Section 252
of the General Corporation Law of the State of Delaware; by PRI NJ in accordance
with the laws of the  State of its  incorporation;  and by PRI DE in the  manner
provided in Section 251 of the General Corporation Law of the State of Delaware.

          3.   The  name  of the  surviving  corporation  in the  merger  herein
certified is Pharmaceutical  Resources,  Inc., which will continue its existence
as said surviving  corporation under its present name upon the effective date of
said merger  pursuant to the  provisions of the General  Corporation  Law of the
State of Delaware.

          4.   The Certificate of  Incorporation  of PRI DE, as now in force and
effect,  shall continue to be the Certificate of Incorporation of said surviving



corporation  unless and until amended and changed  pursuant to the provisions of
the General Corporation Law of the State of Delaware.

          5.   The complete  executed  Agreement and Plan of Merger  between the
aforesaid constituent  corporations is on file at the principal executive office
of the  surviving  corporation,  which  address is: One Ram Ridge  Road,  Spring
Valley,  NY 10977.  A copy of the Agreement and Plan of Merger will be furnished
by the surviving  corporation,  on request, and without cost, to any stockholder
of each of the aforesaid constituent corporations.

          6.   The  authorized  capital  stock of PRI NJ consists of  90,000,000
shares of  Common  Stock  having a par  value of $0.01  per share and  6,000,000
shares of Preferred Stock having a par value of $0.0001 per share.

          7.   The   Agreement   and  Plan  of  Merger   between  the  aforesaid
constituent  corporations  provides  that the merger herein  certified  shall be
effective on filing of this Certificate with the Secretary of State of Delaware.




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Dated: June 24, 2003.

                                     PHARMACEUTICAL RESOURCES, INC.
                                       A New Jersey corporation

                               By:   /s/ Dennis J. O'Connor
                                     ------------------------------------------
                                     Name:  Dennis J. O'Connor
                                     Title: Vice President, Chief Financial
                                            Officer & Secretary

                                     PHARMACEUTICAL RESOURCES, INC.
                                       A Delaware corporation

                               By:   /s/ Joseph Schott
                                     ------------------------------------------
                                     Name:  Joseph Schott
                                     Title: Assistant Secretary