New Delhi, Oct. 31 -- The US Food and Drug Administration (FDA), on Friday said that drugmakers have recalled a staggering amount of blood pressure medicines, prazosin hydrochloride, over concerns that it might contain a cancer causing impurity.

Earlier this month, the FDA said that New Jersey-based Teva Pharmaceuticals USA and drugs distributor Amerisource Health Services issued voluntary nationwide recalls of over 580,000 bottles of various strengths of prazosine capsules, reported AP.

Prazosin hydrochloride is a popular blood pressure medicine and belongs to the drug class of Alpha-1 adrenergic blocker. It helps to relax blood vessels.

Doctors prescribe prazosin to help lower blood pressure. It also is sometimes prescribed for night...