USA – FDA Testing Levels of Carcinogen in Diabetes Drug Metformin

No metformin recalls affect U.S. market at the moment

Levels of possible cancer-causing chemicals in metformin diabetes medications are under investigation by the U.S. Food and Drug Administration.

During the past year and a half, several types of drugs — including angiotensin II receptor blockers and ranitidine (Zantac) — have been found to contain small amounts of genotoxic substances called nitrosamines, such as N-nitrosodimethylamine (NDMA). Exposure to genotoxic substances above acceptable levels over long periods may increase the risk for cancer, the FDA said…