(Reuters) – GSK has been sued by an independent Connecticut laboratory that accused the drugmaker of defrauding the U.S. government and taxpayers by concealing cancer risks in Zantac, once a blockbuster heartburn drug. In a whistleblower complaint filed on Monday, Valisure said GSK violated the federal False Claims Act by hiding the risks for nearly four decades while Medicare, Medicaid and other health programs covered billions of dollars of prescriptions. (Read More)