HealthDay News — The over-the-counter heartburn drug Zantac (ranitidine) has been recalled in the United States and Canada by French drug maker Sanofi.

The recall comes a month after the US Food and Drug Administration first warned that some versions of the drug contained low levels of the cancer-causing contaminant N-nitrosodimethylamine (NDMA), The New York Times reported. Sanofi is investigating the issue, according to a statement from the company.

Several manufacturers of generic versions of Zantac had already recalled their products, which had been taken off the shelves of major US retailers.

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NDMA is found in a variety of products, including cured meats, and is the same contaminant that was found in some versions of the widely used prescription blood-pressure drug valsartan, sold under the brand name Diovan. There have been several recalls of valsartan, The Times reported.

The New York Times Article