Impax sued over potential generic cancer pain drug

On the cusp of major legislation for generic drug makers, Impax Laboratories said Monday that it is being sued over its generic version of Cephalon Inc.’s cancer pain drug Fentora.
Hayward-based Impax (NASDAQ: IPXL) said Teva Pharmaceuticals-owned Cephalon and CIMA Labs Inc. filed the patent infringement suit — standard operating procedure in the generic drug world — on Friday in U.S. District Court in Delaware.