and diarrhea. Pepto-Bismol (bismuth subsalicylate) and Tums (calcium carbonate) are similar in that they can treat acid reflux, indigestion, and upset stomach. However, Pepto-Bismol is distinct in ...

Particularly when overused, antacids can cause digestive distress like diarrhea or constipation ... Remember that antacids can soothe—but can’t treat—gastrointestinal issues like heartburn ...