How long after taking pepto bismol will stool be black

As it slowly makes its way out of your body you may see black poo. This side effect usually goes away when you stop taking the medicine but it may take several days. If your tongue or your poo is still black after you've stopped taking Pepto-Bismol for several days, speak to your doctor or a pharmacist.

Share on Pinterest If black specks appear in stool for more than two days in a row, medical attention is recommended. People who feel otherwise healthy and who have no chronic illnesses can wait a day or two to see if black spots in their stool disappear.

If your stool is bright red or black — which may indicate the presence of blood — seek prompt medical attention. Food may be moving through the large intestine too quickly, such as due to diarrhea. As a result, bile doesn't have time to break down completely.

The active ingredient in Pepto Bismol contains bismuth, and when it combines with the sulfur that is naturally present in your mouth and digestive tract, this can sometimes result in a black tongue or black poop.