Barr announced that it has challenged Cephalon Inc.'s patent by filing Para IV for the analgesic drug Fentora(R) Tablets (Fentanyl citrate buccal tablets), equivalent to fentanyl base 100 mcg, 400 mcg, 600 mcg and 800 mcg.and in turn is being sued to prevent it from marketing a generic version.
The innovator on July 22, . filed a lawsuit in U.S. District Court of Delaware to prevent Barr from selling the product.
Friday 25 July, 2008
Fentanyl citrate buccal tablets:Barr filed Para IV, innovator sued Barr in U.S. District Court of Delaware
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