Pharmaceutical company Dr. Reddy's Laboratories is voluntarily recalling all its over-the-counter heartburn medication in the U.S. due to concerns over potential cancer risks.
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The drugmaker said Wednesday that it had been engaged in this recall since Oct. 1. It affects both prescription and over-the-counter ranitidine medication.
The Food and Drug Administration warned in September that some ranitidine medicine had been found to have NDMA, a carcinogen.
Dr. Reddy's makes a generic version of Zantac.
Retailers like Walmart, Rite Aid and Walgreens have stopped selling the product -- in both forms.
Dr. Reddy's said it has not yet been informed of any "adverse events" from customers due to ranitidine and NDMA.
According to the FDA, NDMA is "classified as a probable human carcinogen (a substance that could cause cancer) based on results from laboratory tests. NDMA is a known environmental contaminant and found in water and foods, including meats, dairy products, and vegetables."