Exhibit 4.2 AMENDMENT TO RIGHTS AGREEMENT dated September 30, 1997, to the Rights Agreement dated August 6, 1991, as amended (the "Rights Agreement"), by and between Pharmaceutical Resources, Inc., a New Jersey corporation (the "Company"), and First...Rights Agreement • April 1st, 1998 • Pharmaceutical Resources Inc • Pharmaceutical preparations
Exhibit 4.1 AMENDMENT TO RIGHTS AGREEMENT dated March 25, 1998, to the Rights Agreement dated August 6, 1991, as amended (the "Rights Agreement"), by and between Pharmaceutical Resources, Inc., a New Jersey corporation ("the "Company"), and First City...Rights Agreement • April 1st, 1998 • Pharmaceutical Resources Inc • Pharmaceutical preparations
