Impax and Teva settle suit with over generic ADHD drug

Impax Pharmaceuticals Inc. and partner Teva Pharmaceuticals USA Inc. settled litigation over a generic ADHD drug copied from one that belongs to Johnson & Johnson Inc. Hayward-based Impax (NASDAQ: IPXL) has a deal with Israel's Teva (NYSE: TEVA) to make a generic copy of Concerta, or methylphenidate hydrochloride extended release tablets. Teva Pharmaceuticals USA is based outside Philadelphia and also makes generic drugs. The two companies did not give details of their settlement with the two Johnson & Johnson (NYSE: JNJ) units, Janssen Pharmaceuticals Inc. and Alza Corp.