You’ve probably never heard of bismuth subsalicylate, but you have probably used it or bought it more than once in your life time.   This intimidating compound is what we know as the pink stuff, Pepto-Bismol.  Pepto-Bismol is very common over-the-counter medication, which comes in tablet or liquid form, used to cope with heartburn, nausea, indigestion and any other upset stomach problems. This medication is an antidiarrheal medication that decreases intestinal inflammation, fluid movement and electrolyte movement in the bowels and digestive system. It used to combat diarrhea, but the mechanism of how exactly it does do, is still a bit unclear.