Endo Pharmaceuticals Holdings Inc. is a specialty pharmaceutical company in pain management. The Company is engaged in the research, development, manufacturing, marketing and sales of branded and generic pharmaceutical products used primarily to treat and manage pain, overactive bladder, prostate and bladder cancer and central precocious puberty. Its portfolio of branded products includes Lidoderm, Opana ER and Opana, Percocet, Frova, Voltaren Gel, Vantas, Valstar and Supprelin LA. The Company concentrates on generics that have one or more barriers to market entry, such as complex formulation, regulatory or legal challenges or difficulty in raw material sourcing. During the year ended December 31, 2009, the branded products comprised approximately 91% of the Company's net sales. In March 2009, Endo Pharmaceuticals Holdings Inc. completed the acquisition of Indevus Pharmaceuticals, Inc.