Walmart, CVS, Walgreens pull Zantac and similar heartburn drugs because of cancer worries

Over the counter Zantac  is used for acid reflux and heartburn and, according to FDA, may contain a carcinogen.

(CNN)Walmart, the United States' largest retailer, is the latest to announce it's suspending the sale of Zantac and other over-the-counter ranitidine medications due to concerns they might contain a substance that can cause cancer. Customers can return the products to Walmart or Sam's Club stores for a refund.

CVS Pharmacy and Walgreens also recently announced they are no longer selling the medications.
CVS, the largest pharmacy chain in the country, said over the weekend it was suspending sale of Zantac and other products which contain ranitidine until further notice. Zantac and its CVS-branded generic counterpart have not been recalled, a statement from CVS said, and the FDA has not recommended that patients stop taking ranitidine products. Customers who have already bought the products can return them to CVS for a refund, CVS said.
Walgreens said in a