Par Pharmaceutical Begins Shipment of Generic Rythmol SR

Par Pharmaceutical Companies, Inc. PRX today announced that it began shipping the 225mg, 325mg, and 425mg strengths of propafenone SR capsules, the generic version of GlaxoSmithKline's Rythmol SR. Par has been awarded 180 days of marketing exclusivity, commencing at launch, for being the first to file an ANDA containing a paragraph IV certification for the product. According to IMS Health data, annual sales in the U.S. of Rythmol are approximately $121 million.