Pharmacy warns FDA of cancer-causing chemical found in widely used heart pill CNBCFourth Carcinogen Discovered in Heart Pills Used by Millions BloombergAnother blood pressure drug tests positive for cancer-causing compound SlashGearPharmacy tests turn up another cancer-causing compound in heart drugs CNNFOURTH carcinogen found in US blood pressure drugs as global pill-contamination scandal drags on Daily MailView full coverage on Google News