FDA warns of cancer-causing impurity in popular heartburn drug Zantac

Heartburn, and its even uglier cousin, acid reflux, can leave a person feeling incredibly uncomfortable, which is why drugs meant to treat such conditions are so popular. But, given the choice, most people would likely choose a bit of digestive discomfort over other more serious conditions like, oh I don't know, cancer. Apparently, that's a choice that some will now have to consider, as the FDA is alerting heartburn sufferers that rely on the medication ranitidine -- sold under the brand name Za...