In September, the Food and Drug Administration warned that a heartburn drug may contain a cancer-causing chemical.
Over the weekend, the chain pharmacy CVS announced it would stop selling all versions of the drug.
The decision follows a voluntary recall of the drug from several other chains, including Walmart.
Gizmodo reports that Walgreens announced it also would stop selling Zantac and related drugs.
The troublesome chemical is called N-nitrosodimethylamine, or NDMA and is thought to be a human carcinogen.