The U.S. Food and Drug Administration has ordered the recall of over 580,000 bottles of a commonly prescribed blood pressure drug after tests revealed unsafe levels of a potentially carcinogenic impurity.

The FDA said the drug in question is prazosin hydrochloride, sold in 1 mg, 2 mg and 5 mg capsule strengths. Multiple bottle sizes, from 100-count to 1,000-count bottles, with expiration dates between October of this year and February 2027 are affected.

Regulators flagged unusually high amounts of an impurity called “N-nitroso prazosin impurity C” that exceeded the FDA’s acceptable safety thresholds, EatingWell reported .

According to the Houston Chronicle , the recall has been classified as Class II, meaning the impurity may cause temporary or reversible health effects, though the

See Full Page