Exhibit 3.4


                                   BY-LAWS OF

                         PHARMACEUTICAL RESOURCES, INC.


                               ARTICLE I---OFFICES

         1. Registered  Office and Agent.  The Registered  Office and Registered
Agent of the  Corporation in the State of New Jersey shall be as determined from
time to time by the Board of Directors of the Corporation.

         2. Principal Place of Business.  The principal place of business of the
Corporation is One Ram Ridge Road, Spring Valley, New York 10977.

         3. Other Places of Business. Branches or subordinate places of business
or offices  may be  established  at any time by the Board at any place or places
where the Corporation is qualified to do business.

                            ARTICLE II---SHAREHOLDERS

         1. Annual  Meetings.  The annual meeting of shareholders  shall be held
upon not less  than ten nor more than  sixty  days  written  notice of the time,
place and  purpose of the  meeting at 11:00 a.m. on the 15th day of the month of
November of each year at the  principal  office of the  Corporation,  or at such
other time and place as shall be specified in the notice of meeting, in order to
elect  directors  and  transact  such other  business  as shall come  before the
meeting. If that date is a legal holiday,  the meeting shall be held at the same
hour on the next succeeding business day.

         2. Special  Meetings.  A special meeting of shareholders  may be called
for any purpose by the president or the Board.  A special  meeting shall be held
upon not less than ten or more than sixty days written notice of the time, place
and purpose of the meeting.

         3. Action Without  Meeting.  The shareholders may act without a meeting
if, prior or subsequent  to such action,  each  shareholder  who would have been
entitled to vote upon such action shall consent in writing to such action.  Such
consent shall be filed in the minute book.

         4.  Quorum.  The  presence  at a  meeting  in person or by proxy of the
holders of shares  entitled to cast a majority of the votes shall  constitute  a
quorum.

         5. Voting.  Except as otherwise  provided by statute or the Certificate
of Incorporation, at all meetings of the shareholders, every registered owner of
shares  entitled  to vote may vote in person or by proxy and shall have one vote
for each such share  standing  in his name on the books of the  Company.  At all
elections of directors,  the voting shall be by ballot.  The Board of Directors,
or, if the Board shall not have made the appointment,  the chairman presiding at
any meeting of shareholders, shall have the power to appoint two or more persons
to act as inspectors or tellers, to




receive, canvass, and report the votes cast by the shareholders at such meeting;
but no candidate  for the office of director  shall be appointed as inspector or
teller at any meeting for the election of directors.

         6. Conduct of Meeting.  The chairman or, in his absence,  the president
or a vice president shall preside at all meetings of the shareholders;  and, the
secretary,  or in his absence,  the person whom the chairman or, in his absence,
such  president or vice  president  may  appoint,  shall act as secretary of the
meeting and keep the minutes thereof.


                        ARTICLE III---BOARD OF DIRECTORS

         1.  Number and Term of Office.  Subject to the rights of the holders of
any class or series of capital  stock having a preference  over the common stock
of the Company 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 less than three nor
more than fifteen  directors.  Subject to the  foregoing,  the actual  number of
directors shall be determined  from time to time by the Board of Directors.  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,
with the term of office of the first  class to expire at the  annual  meeting of
shareholders  to be held in 1994,  the term of  office  of the  second  class to
expire at the annual  meeting of  shareholders  to be held in 1992,  and term of
office of the third class to expire at the annual meeting of  shareholders to be
held in  1993,  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
shareholders in the third year following the year of their  election,  with each
director to hold office  until his  successor  shall have been duly  elected and
qualified.

         2.  Regular  Meetings.  A regular  meeting  of the Board  shall be held
without  notice and  immediately  following  and at the same place as the annual
shareholders'  meeting for the purposes of electing officers and conducting such
other business as may come before the meeting.  The Board,  by  resolution,  may
provide for additional regular meetings which may be held without notice, except
to members not present at the time of the adoption of the resolution.

         3. Special  Meetings.  A special  meeting of the Board may be called at
any time by the president or by three  directors  for any purpose.  Such meeting
shall be held upon two days' notice if given  orally  (either by telephone or in
person),  by telefacsimile or by overnight courier,  or upon not less than three
days'  notice if given by  depositing  the  notice in the United  States  mails,
postage  prepaid.  Such notice shall  specify the time and place of the meeting,
which may be by means of


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conference,  telephone  or any  means  of  communication  by which  all  persons
participating in the meeting are able to hear each other.

         4.  Action  Without  Meeting.  The Board may act  without a meeting if,
prior or  subsequent  to such action,  each member of the Board shall consent in
writing to such action.  Such written  consent or consents shall be filed in the
minute book.

         5. Quorum. A majority of the entire Board of Directors shall constitute
a quorum for the transaction of business.

         6.  Vacancies in Board of  Directors.  Except as otherwise  provided in
this Section,  any vacancy on the Board,  or a vacancy  caused by an increase in
the  number  of  directors,  may be filled by the  affirmative  majority  of the
remaining  directors or by a sole  remaining  director,  even though less than a
quorum of the  Board.  The sole and  exclusive  manner of filling a vacancy of a
"Company  Designee"  (as such term is defined in the Stock  Purchase  Agreement,
dated  March 25,  1998,  between  the  Corporation  and Lipha  Americas,  Inc.),
including a successor to a Company Designee, shall be by an affirmative majority
of the remaining  Company  Designees or any  successors  or by a sole  remaining
Company Designee or any successor,  even though less than a quorum of the Board.
This  Section  shall not be amended or  repealed,  except  with the consent of a
majority of the Company Designees or their successors.

         7. Executive  Committee.  There shall be an executive  committee of the
Board of Directors which shall consist of not more than three  directors,  which
shall  have the power and  authority  to manage  the  day-to-day  affairs of the
Corporation  without the necessity of a meeting of the whole Board of Directors,
or approval of said Board.

         8. Conduct of Meetings:  Voting. At meetings of the Board of Directors,
the chairman or, in his absence,  the president or a designated  vice  president
shall preside.  The act of the majority of the directors  present at any meeting
in which a quorum is present shall be the act of the Board of Directors.  At any
meeting at which  every  director  shall be  present,  even  though  without any
notice, any business may be transacted.

         9.  Compensation.  The directors  shall receive such  compensation  for
their  services as directors  and as members of any  committee  appointed by the
Board as may be  prescribed by the Board of Directors and shall be reimbursed by
the Company for ordinary and reasonable  expenses incurred in the performance of
their duties.

         10.  Manifestation of Dissent. A director of the Company who is present
at a meeting of the Board of Directors at which action on any  corporate  matter
is taken  shall be  presumed to have  assented  to the action  taken  unless his
dissent  shall be entered in the  minutes of the meeting or unless he shall file
his written dissent to such action.

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                         ARTICLE IV---WAIVERS OF NOTICE

         Any  notice   required  by  these  By-Laws,   by  the   Certificate  of
Incorporation,  or by the New Jersey  Business  Corporation Act may be waived in
writing by any person entitled to notice.  The waiver or waivers may be executed
either  before or after the event with respect to which  notice is waived.  Each
director or shareholder  attending a meeting  without  protesting,  prior to its
conclusion,  the lack of  proper  notice  shall be deemed  conclusively  to have
waived notice of the meeting.


                              ARTICLE V---OFFICERS

         1.  Election.  At its regular  meeting  following the annual meeting of
shareholders,  the Board shall elect a president, a treasurer, a secretary,  and
it may elect such other officers,  including a chairman of the Board, and one or
more vice presidents,  assistant secretaries and assistant treasurers,  who will
have such duties and authority as  determined by the Board.  One person may hold
two or more offices.

         2. Duties and Authority of President.  The president shall be the chief
executive  officer of the  Corporation.  Subject  only to the  authority  of the
Board,  he shall have general charge and  supervision  over, and  responsibility
for, the business and affairs of the Corporation.  Unless otherwise  directed by
the Board,  all other officers shall be subject to the authority and supervision
of the  president.  The  president may enter into and execute in the name of the
Corporation  contracts or other instruments in the regular course of business or
contracts or other  instruments  not in the regular course of business which are
authorized,  either generally or  specifically,  by the Board. He shall have the
general  powers  and  duties  of  management  usually  vested  in the  office of
president of a corporation.

         3. Duties and Authority of Vice  President.  Each vice president  shall
perform  such  duties  and  have  such  authority  as from  time to time  may be
delegated to him by the president or by the Board.

         4. Duties and  Authority of  Treasurer.  The  treasurer  shall have the
custody of the funds and securities of the  Corporation  and shall keep or cause
to be kept regular books of account for the  Corporation.  The  treasurer  shall
perform  such other  duties and possess such other powers as are incident to the
office or as shall be assigned by the president or the Board.

         5. Duties and Authority of Secretary. The secretary shall cause notices
of all meetings to be served as  prescribed  in these  By-Laws and shall keep or
cause to be kept the minutes of all meetings of the  shareholders and the Board.
The secretary  shall have charge of the seal of the  Corporation.  The secretary
shall perform such other duties and possess such other powers as are incident to
the office or as shall be assigned by the president or the Board.


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        6.  Vacancies.  In case any office  shall become  vacant,  the Board of
Directors shall have the power to fill such vacancies. In case of the absence or
disability  of any officer,  the Board of  Directors  may delegate the powers or
duties of any officer to another officer or a director for the time being.

         7. Exercise of Rights as Shareholder.  Unless otherwise  ordered by the
Board of Directors, the president, or a vice president thereunto duly authorized
by the  president,  shall  have  full  power  and  authority  on  behalf  of the
Corporation  to  attend  and to  vote  at any  meeting  of  shareholders  of any
corporation in which this Corporation may hold stock, and may exercise on behalf
of this  Corporation  any and  all of the  rights  and  powers  incident  to the
ownership of such stock at any such meeting,  and shall have power and authority
to execute and deliver  proxies and  consents on behalf of this  Corporation  in
connection  with the  exercise  by this  Corporation  of the  rights  and powers
incident to the ownership of such stock.  The Board of  Directors,  from time to
time, may confer like powers upon any other person or persons.


                           ARTICLE VI---CAPITAL STOCK

         1. Stock Certificates.  Certificates for stock of the Corporation shall
be in such form as the Board of Directors  may from time to time  prescribe  and
shall be signed by the president or a vice  president and by the treasurer or an
assistant treasurer or the secretary or an assistant secretary.  If certificates
are  signed by a  transfer  agent,  acting in  behalf of the  Corporation  and a
registrar, the signatures of the officers of the Corporation may be facsimile.

         2.  Transfer  Agent.  The Board of  Directors  shall  have the power to
appoint  one or  more  transfer  agents  and  registrars  for the  transfer  and
registration of  certificates of stock of any class,  and may require that stock
certificates  be  countersigned  and  registered by one or more of such transfer
agents and registrars.

         3. Transfer of Stock.  Shares of capital stock of the Corporation shall
be  transferable  on the books of the  Corporation  only by the holder of record
thereof  in  person  or  by a  duly  authorized  attorney,  upon  surrender  and
cancellation of certificates for a like number of shares.

         4. Lost Certificates.  In case any certificate for the capital stock of
the Corporation shall be lost, stolen, or destroyed, the Corporation may require
such proof of the fact and such  indemnity to be given to it and to its transfer
agent and registrar, if any, as shall be deemed necessary and advisable by it.

         5.  Holder of Record.  The  Corporation  shall be entitled to treat the
holder of record of any share or shares of stock as the  holder  thereof in fact
and shall not be bound to recognize  any equitable or other claim to or interest
in such  shares on the part of any other  person,  whether  or not it shall have
express or other notice thereof, except as otherwise expressly provided by law.


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         6. Closing of Books.  The Board of Directors  shall have power to close
the stock transfer  books of the  Corporation  for a period not exceeding  fifty
days preceding the date of any meeting of  shareholders  or the date for payment
of any dividend or the date for  allotment of rights or the date when any change
or conversion or exchange of capital stock shall go into effect;  provided that,
in lieu of closing the stock transfer  books,  the Board of Directors may fix in
advance a date,  not exceeding  fifty days  preceding the date of any meeting of
shareholders,  or the date for payment of any dividend or the date for allotment
of rights,  or the date when any change or  conversion  or  exchange  of capital
stock  shall  go  into  effect,  as a  record  date  for  the  determination  of
shareholders  entitled to notice of and to vote at any such meeting, or entitled
to receive payment of any such dividends, or any such allotment of rights, or to
exercise  the rights in respect of any such  change,  conversion  or exchange of
capital stock, and in such case only shareholders of record on the date so fixed
shall be entitled to such notice of and to vote at such  meeting,  or to receive
payment of such dividend,  or allotment of rights,  or exercise such rights,  as
the case may be, and  notwithstanding  any transfer of any stock on the books of
the Corporation after any such record date fixed as herein provided.

             ARTICLE VII---INDEMNIFICATION OF DIRECTORS AND OFFICERS

         1. The Corporation  shall,  to the fullest  extent,  from time to time,
permitted by law,  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
person's serving as an officer or director of the Corporation.

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

         3.  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  VII,  the   Certificate   of
Incorporation, these By-Laws, by vote of shareholders, or otherwise.

         4. 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 witness and any  liabilities
asserted  against such  person,  whether or not the  Corporation  would have the
power to indemnify such person against such expenses and liabilities  under this
Article VII 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.

         5.  Neither  the  amendment  or repeal  of this  Article  VII,  nor the
adoption of any provision of the Certificate of Incorporation  inconsistent with
this Article VII, shall eliminate or reduce the protection or rights afforded by
this Article VII to any person in respect to any matter which

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occurred,  or any claim or proceeding  which but for this Article VII would have
been made or arisen, prior to such amendment, repeal, or adoption.

             ARTICLE VIII---QUALIFICATIONS OF DIRECTORS AND OFFICERS

        1.  Definitions.  For purposes of this Article VIII, the following terms
shall have the following meanings:

              (a)   "Affiliate",   "Associate"  and  "control"  shall  have  the
         respective meanings ascribed to such terms in Rule 12b-2 of the General
         Rules and  Regulations  under the Securities  Exchange Act of 1934 (the
         "Exchange Act").

              (b)  "Principal  Party"  shall  mean any  person or entity  which,
         pursuant to an agreement, understanding or otherwise, is represented by
         another person.

              (c)  "Regulatory   Approvals"   shall  mean  any  governmental  or
         regulatory approvals, agreements, permits, licenses or registrations of
         the Corporation or any of its subsidiaries necessary for the conduct of
         their business.

         2.  Qualifications.  No person  shall serve as a director or officer of
the  Corporation  or shall be elected or appointed to serve in any such capacity
if, in the good faith judgment of the Board of Directors,  there is a reasonable
likelihood  that service by such person as a director or officer  (whether based
on the  qualifications of such person or on the qualifications of any Affiliate,
Associate or Principal  Party of such person) will result in (i) the loss of any
existing  Regulatory  Approvals,  (ii) the inability of the  Corporation  or any
subsidiary  to renew any  Regulatory  Approvals  or (iii) the  inability  of the
Corporation or any subsidiary to obtain new Regulatory Approvals.

         3.  Removal.  Any director  specified in Section 2 of this ARTICLE VIII
may be removed, for cause, at any time, by the affirmative vote of a majority of
the  directors  present at any  meeting in which a quorum is  present.  Any such
affected director shall be counted for purposes of a quorum at any such meeting,
but shall not be counted  for  purposes  of  determining  the vote of  directors
present  at such  meeting.  Any  vacancy  caused by the  removal  of a  director
pursuant to this Section 3 may be filled by the affirmative vote of the majority
of the remaining directors then in office.

         4.  Determination of the Board of Directors.  Any  determination by the
Board of Directors with respect to the  qualifications of any person to serve as
a director or officer of the Corporation  pursuant to this ARTICLE VIII, whether
based  on  the  qualifications  of  such  person  or the  qualifications  of any
Affiliate,  Associate or  Principal  Party of such  person,  shall,  among other
things,  take into  account  the  involvement  of any of such  persons  in legal
actions  or  proceedings  or  governmental  investigations.  Persons,  or  their
Affiliates, Associates or Principal Parties, covered by Section 2 shall include,
but shall not be limited to, any (i)  directors,  officers or  employees  of the
Corporation  or its  subsidiaries  whose  actions  the  Board of  Directors  has
determined  in good  faith  were  detrimental  to the  maintenance,  renewal  or
acquisition of the Regulatory Approvals, whether

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they  resigned or were  dismissed  for cause,  (ii) persons or entities who were
convicted in criminal  proceedings or are named  defendants of pending  criminal
proceedings  (excluding minor offenses) relating to the pharmaceutical  industry
or any other  business  regulated  by any Federal,  state or local  governmental
agency or (iii)  persons or  entities  who are  subject to any order,  judgment,
decree or debarment,  not subsequently  reversed,  suspended or vacated,  of any
court  of  competent   jurisdiction  or  governmental  or  regulatory  authority
permanently  or  temporarily  enjoining  them from,  or otherwise  limiting such
person or entity from engaging in, any type of business practice relating to the
pharmaceutical industry or any other business regulated by any Federal, state or
local governmental agency.

          ARTICLE IX---AMENDMENTS TO AND EFFECT OF BY-LAWS; FISCAL YEAR

         1.  Force and  Effect of  By-Laws.  These  By-Laws  are  subject to the
provisions  of the New Jersey  Business  Corporation  Act and the  Corporation's
Certificate  of  Incorporation,  as it may be amended from time to time.  If any
provision in these By-Laws is  inconsistent  with a provision in that Act or the
Certificate of  Incorporation,  the provision of that Act or the  Certificate of
Incorporation shall govern.

         2.  Amendments  to By-Laws.  These  By-Laws may be altered,  amended or
repealed  by the  shareholders  or the Board.  Any By-Laws  adopted,  amended or
repealed by the shareholders may be amended or repealed by the Board, unless the
resolution of the shareholders  adopting such By-Laws expressly  reserves to the
shareholders the right to amend or repeal it.

         3.  Fiscal  Year.  The  fiscal  year of the  Corporation  shall  end on
September 30th of each year.


Amended and restated through June 30, 1998.

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