Same is true for Pepto Bismol. Someone I knew took some extra strength Pepto Bismol to treat an upset stomach and diarrhea. Her stool ended up turning black, w

Same is true for Pepto Bismol. Someone I knew took some extra strength Pepto Bismol to treat an upset stomach and diarrhea. Her stool ended up turning black, which I advised is a sign of intestinal bleeding. She went to the emergency room and learned that bismuth, the active ingredient in Pepto Bismol, can temporarily turn stool black. [0] [0] https://www.pepto-bismol.com/en-us/faq/black-stool-black-tongue https://www.pepto-bismol.com/en-us/faq/black-stool-black-ton...