Pepto-Bismol Caplets relieve nausea, heartburn, indigestion, upset stomach, and diarrhea. 5 Symptom Relief: nausea; heartburn; indigestion; upset stomach; diarrhea. Each caplet contains: 27 mg calcium, 3 mg Sodium, 99 mg Salicylate. Low sodium. Sugar free. Bismuth subsalicylate. Relieves travelers’ diarrhea; diarrhea; upset stomach due to overindulgence in food and drink, including: heartburn, indigestion, nausea, gas, belching, fullness.