Endo Targets Sandoz, Impex Over Generic Versions Of Opana

Law360, New York (November 16, 2012, 5:29 PM EST) -- Endo Pharmaceuticals on Wednesday sued generic-drug makers Sandoz Inc. and Impax Laboratories Inc., alleging that they infringed patents covering a version of its Opana ER painkiller, the company's latest attempt to keep copycat versions of the drug from coming to market.

Endo claims Sandoz, a division of Novartis AG,  flouted four patents covering Opana ER when the companies submitted abbreviated new drug applications for a generic version of the painkiller to the U.S. Food and Drug Administration.  

Sandoz and ThoRx are seeking to produce and sell...
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