Doctors prescribe prazosin, which relaxes blood vessels, to help lower blood pressure. It also is sometimes prescribed for nightmares and other sleep disturbances caused by post-traumatic stress disorder.
The FDA said in enforcement orders posted online that it has given the affected lots of the drug a Class II risk classification because some of the recalled medication may have nitrosamine impurities that are considered potentially cancer causing.
According to the FDA, N-nitrosamine impurities are a class of potentially cancer-causing chemicals that can form during manufacture or storage of a drug.
