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.

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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

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