More than 580,000 bottles of a popular blood pressure medication distributed nationwide have been recalled, according to the U.S. Food and Drug Administration.

The recall involves bottles of Prazosin Hydrochloride, Capsules, USP, 1, 2, and 5 mg, which were distributed by Teva Pharmaceuticals USA Inc.

The bottles contain anywhere from 100, 250, 500, and 1,000 capsules.

The medication contains nitrosamine impurities, known as “N-nitroso Prazosin impurity C” that were above acceptable intake limits. Exposure to this product could lead to severe adverse health consequences.

Nitrosamines are a class of known carcinogens and do not cause harm when ingested a tlow levels. Impurities may increase the risk of cancer if people are exposed to them above acceptable levels and over long periods of time.

The bottles of medication were distributed nationwide.

The recall was initiated on Oct. 7, and was classified to a Class II risk level on Oct. 24.

A Class II recall is a situation in which use of, or exposure to, a violative product may cause temporary or medically reversible adverse health consequences or where the probability of serious adverse health consequences is remote.

The recall remains ongoing, according to the U.S. Food and Drug Administration report.

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