Terrance J. Coughlin has been named chief operating officer of Par Pharmaceutical Companies, Inc. Mr. Coughlin will be responsible for global manufacturing activities and R&D efforts, as well as the new product selection process.    Mr. Coughlin joins the company from Glenmark Generics, Inc., where he most recently served as president and chief executive officer, and prior to that, served as president. Mr. Coughlin had overall responsibility for the North American, Western European and Easte...