SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 205497


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


                                    FORM 8-K


                                 CURRENT REPORT


                         PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934



Date of report (Date of earliest event reported): March 25, 1998


                         PHARMACEUTICAL RESOURCES, INC.
             (Exact name of registrant as specified in its charter)



       NEW JERSEY                  File Number 1-10827            22-3122182
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(State or other jurisdiction of   Commission File Number)     (I.R.S. Employer
incorporation or organization)                               Identification No.)



One Ram Ridge Road, Spring Valley, New York                    10977
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(Address of principal executive office)                      (Zip Code)




Registrant's telephone number, including area code: (914)425-7100



                           TOTAL NUMBER OF PAGES -- 14
                       EXHIBIT INDEX IS LOCATED ON PAGE 4

    




Item 5.    Other Events.
- ------------------------

     Stock Purchase Agreement.
     -------------------------

     On March 25, 1998, the Registrant  entered into a Stock Purchase  Agreement
(the  "Agreement")  with Lipha  Americas,  Inc., a Delaware  corporation  and an
affiliate of Merck KGaA, Darmstadt,  Germany ("Lipha"),  as more fully described
in a press release  dated March 26, 1998,  issued by the  Registrant  describing
such transaction and certain related matters,  which is attached as Exhibit 10.1
hereto.
     
     Rights Agreement.
     -----------------

     In  connection  with the  execution  and  delivery  of the  Agreement,  the
Registrant  amended  the Rights  Agreement,  dated  August 6, 1991,  as amended,
between the  Registrant  and First City Transfer  Company,  as successor  rights
agent (the "Rights  Agent"),  (the  "Rights  Agreement").  The  Amendment to the
Rights  Agreement,  dated March 25, 1998,  between the Registrant and the Rights
Agent  amended  certain  definitions  in the  Rights  Agreement  to exempt  from
operation of the Rights  Agreement  acquisitions  of common stock and options to
purchase common stock by Lipha and its affiliates and associates pursuant to the
Agreement and other agreements contemplated thereby and to remove the exemptions
previously  granted to Clal  Pharmaceutical  Industries,  Ltd.  ("Clal"),  which
Amendment is attached as Exhibit 4.1 hereto. The Registrant and the Rights Agent
also  amended  the Rights  Agreement  on  September  30,  1997,  to exempt  from
operation of the Rights Agreement certain  permitted  transferees of Clal, which
amendment is attached as Exhibit 4.2 hereto.

Item 7.  Financial statements and Exhibits.
- -------------------------------------------

(c)  Exhibits.

     4.1  Amendment to Rights Agreement,  dated March 25, 1998, between the
          Registrant  and First City Transfer  Company.  

     4.2  Amendment to Rights Agreement,  dated September 30, 1997, between
          the Registrant and First City Transfer Company.

     10.1 Press Release of the Registrant, dated March 26, 1998






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                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange of Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.

                                                  PHARMACEUTICAL RESOURCES, INC.
                                                                   (Registrant)




March 31, 1998                                    ------------------------------
                                                  Dennis J. O'Connor
                                                  Vice President and
                                                    Chief Financial Officer

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                                  Exhibit Index


Exhibit No.         Description Seq.                             Page No.

4.1                 Amendment to Rights Agreement,                  5
                    dated March 25, 1998,
                    between the Registrant and 
                    First City Transfer Company

4.2                 Amendment to Rights Agreement,                  9
                    dated  September 30, 1997,
                    between the Registrant and First 
                    City Transfer Company

10.1                Press Release of the                           12
                    Registrant, dated March 26, 1998


























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