US drugmaker Santarus sues Dr Reddy's over heartburn drug

US drugmaker Santarus said it filed a lawsuit against Dr Reddy's Laboratories, accusing the Indian drugmaker of infringing its patents on heartburn drug Zegerid.The lawsuit, filed in a US district court, is in response to Dr Reddy's application with the US Food and Drug Administration, seeking approval to market generic versions of Zegerid before July 2016, when Santarus' patents on the drug expire.Zegerid capsules, which treat heart...