Medically reviewed by Lindsay Cook, PharmD Key Takeaways Pepto-Bismol treats both upset stomach and diarrhea, but Tums does not.Pepto-Bismol is not safe for pregnant or breastfeeding women, while Tums ...

With so much fun in the sun to be had, who has time for an upset stomach this summer? Warm weather can disrupt digestion, as our bodies shift blood flow to our extremities in an effort to keep us cool ...