The recall of a common drug used to control blood pressure and help prevent heart failure was announced by the US Food and Drug Administration on Friday, a week after 22 other countries recalled it because the drug contains a chemical that poses a potential cancer risk. Valsartan is off patent and is used as a component of other generic medicines, but not all medicines containing the ingredient are involved, according to the FDA. The US recall includes the the versions of valsartan that are made by Major Pharmaceuticals, Solco Healthcare and Teva Pharmaceuticals Industries Ltd. as well as valsartan/hydrochlorothiazide...