Pfizer Sues Torrent Pharma to Block Generic Viagra Sales
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Pfizer Inc. sued Torrent Pharmaceuticals Ltd. in a bid to block sales of a generic version of erectile-dysfunction drug Viagra while the largest U.S. drugmaker’s patent is still in effect.
Torrent is seeking approval from the U.S. Food and Drug Administration for generic Viagra, also known as sildenafil citrate, before Pfizer’s U.S. patent expires on Oct. 22, 2019, according to a complaint filed in federal court in Manhattan.