what is the best over the counter medicine for nausea and vomiting?
['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.']