The US Food and Drug Administration is advising that certain extended-release formulations of metformin made by five manufacturers have high levels of the potential carcinogen N-Nitrosodimethylamine (NDMA) and has requested these products be recalled. Earlier evaluations led the agency to conclude these products posed negligible cancer risks.
Valisure, the online pharmacy that challenged the agency's initial test findings, asserts that the FDA continues to underestimate the carcinogenic...





