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Teva, Amneal Lose Opana ER Patent Fight Against Endo

By Dani Kass (October 7, 2016, 6:47 PM EDT) -- A Delaware federal judge on Friday upheld the validity of an Endo Pharmaceuticals Inc. patent for its opioid painkiller Opana ER, shooting down arguments from Amneal Pharmaceuticals LLC and Teva Pharmaceuticals USA Inc. that it was invalid and that Teva had express permission to use the active ingredient it covered....

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