Glaxo sues over prostate-drug patents

GlaxoSmithKline L.L.C., which has operations in Philadelphia, sued generic drugmakers Anchen Pharmaceuticals Inc. and Banner Pharmacaps Inc. in federal court in Delaware, alleging infringement of patents for Avodart, which is used to treat enlarged prostate glands, Bloomberg News reported.

Glaxo last month lost its bid for approval from the Food and Drug Administration to expand use of Avodart to men at risk for prostate cancer, Bloomberg reported in December.