Pepto-Bismol and Tums are two popular over-the-counter (OTC) medications taken to manage heartburn, abdominal pain, bloating, and diarrhea. Pepto-Bismol (bismuth subsalicylate) and Tums (calcium ...

Examples include calcium carbonate (Tums) or omeprazole (Prilosec). Pepto Bismol is an over-the-counter antacid, and may help reduce inflammation and discomfort in mild gastritis cases.