Samples of Popular Diabetes Drug Contain Potential Carcinogen, F.D.A. Says August 11, 2022 AutoBot cancer, diabetes, Food and Drug Administration, Merck & Company Inc, Regulation and Deregulation of Industry, Shortages, your-feed-healthcare 0 Testing found nitrosamine contamination in some samples of Januvia, but regulators will allow Merck to continue selling the drug for now.