Question: what is the best over the counter medicine for upset stomach and diarrhea?
Answer: Bismuth subsalicylate, the active ingredient in OTC medications like Kaopectate® and Pepto-Bismol™, protects your stomach lining. Bismuth subsalicylate is also used to treat ulcers, upset stomach and diarrhea. Other medicines include cyclizine, dimenhydrinate, diphenhydramine, and meclizine.