Barr Pharmaceuticals Inc. subsidiary, Duramed Pharmaceuticals Inc., files litigation against Watson Pharmaceuticals.
"Watson Pharmaceuticals (NYSE:WPI) Inc. said Friday that Duramed Pharmaceuticals Inc., a subsidiary of Barr Pharmaceuticals Inc. (NYSE:BRL) , filed a patent lawsuit against Watson and certain of its subsidiaries related to Quasense, Watson's generic version of Duramed's Seasonale, an extended-cycle oral contraceptive."