heartburn
There are a number of natural ways to treat indigestion. Shutterstock

A series of over-the-counter antacid medications have been recalled by Apotex Corp. for a possible cancer-causing impurity. The recalled ranitidine tablets were sold at Walmart, Walgreens, and Rite Aid.

The recall affects both brand and generic formulations of 75 and 150 mg ranitidine tablets produced by a variety of manufacturers. The affected heartburn medications contain a nitrosamine impurity called N-nitrosodimethylamine (NDMA) at low levels. NDMA is classified as a possible carcinogen that could cause cancer.

The recalled antacid medications were distributed nationwide to warehousing chains. A full list of recalled ranitidine tablets can be viewed here.

Ranitidine hydrochloride tablets are an over-the-counter oral medication that is used for the relief of heartburn caused by acid indigestion and sour stomach from eating or drinking certain foods and beverages. Consumers that have experienced any problems from the recalled heartburn medication should contact their healthcare provider.

Questions about the recall can be directed to Apotex by phone at 1-800-706-5575, Monday through Friday from 8:30 a.m. to 5 p.m. ET or by email at UScustomerservice@Apotex.com.

Customers that have purchased the recalled ranitidine tablets directly from Apotex can call Inmar Rx Solutions at 1-800-967-5952 (option 1), Monday through Friday from 9 a.m. to 5 p.m. ET to arrange for a return of the product.

The company said it has not received any reports of adverse effects related to the antacid medications that have been recalled.