1 EXHIBIT 4.2.1 STOCK AND WARRANT PURCHASE AGREEMENT This Stock and Warrant Purchase Agreement (the "Agreement") is made as of April ___, 2001 between Questcor Pharmaceuticals, Inc., a California corporation (the "Company"), and the purchasers who are...Stock and Warrant Purchase Agreement • May 30th, 2001 • Questcor Pharmaceuticals Inc • Pharmaceutical preparations • California
