A pharmaceutical company has issued a voluntary recall for more than half a million bottles of blood pressure medication after tests showed the capsules had high levels of potentially cancer-causing chemicals.

An enforcement report from the Food and Drug Administration said New Jersey-based Teva Pharmaceuticals USA Inc. recalled 580,844 bottles of Prazosin Hydrochloride capsules that were distributed nationwide.

According to the report, the recall was initiated because tests for the capsules, which came in doses of 1, 2 and 5 mg, showed they had "above acceptable intake limits" for N-nitroso Prazosin impurity C , a cancer-linked chemical compound.

The recall was initiated Oct. 7, the report said. Oct. 24, the recall was classified as a "Class II," which means the product "may cause

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