Zantac and Generic Brands Pulled from the Market Due to Cancer ConcernsThe maker of a generic version of a popular heartburn medication is stopping worldwide distribution over concerns the drug could be contaminated with a cancer-causing substance. Novartis AG’s Sandoz unit said Wednesday it would stop distribution of generic versions of the stomach drug Zantac after regulators in the U.S. and Europe began investigating the potential contamination, according to Bloomberg. Some versions of Zantac, also known by the generic name ranitidine, have been recalled in Europe and Canada. Regulators first said last week they were looking into the potential contamination. Concerns arose over both generic heartburn and antacid medications and Zantac itself, made by Sanofi, according to the Los Angeles Times.