EXHIBIT 4.2 AMENDMENT NO. 1 TO RIGHTS AGREEMENT ----------------------------------- AMENDMENT, dated as of May 5, 1999, to the Rights Agreement, dated as of September 10, 1996 (the "Rights Agreement"), between ViroPharma Incorporated, a Delaware...Rights Agreement • May 14th, 1999 • Viropharma Inc • Pharmaceutical preparations
AMONGInvestment Agreement • May 14th, 1999 • Viropharma Inc • Pharmaceutical preparations • New York
1.2 Cashless Exercise. At any time after a Change of Control ----------------- (as defined herein) but prior to the Expiration Date, in lieu of the payment of the Exercise Price, the Warrantholder shall have the right (but not the obligation) to...Common Stock Purchase Warrant • May 14th, 1999 • Viropharma Inc • Pharmaceutical preparations • New York
