I noticed that Pepto-Bismol sometimes darkens the tongue/stool. - TopicsExpress



          

I noticed that Pepto-Bismol sometimes darkens the tongue/stool. Why does this happen and how long does it last? The active ingredient in Pepto-Bismol contains bismuth. When a small amount of bismuth combines with trace amounts of sulfur in your saliva and gastrointestinal tract, a black-colored substance (bismuth sulfide) is formed. This discoloration is temporary and harmless. It can last several days after you stop taking Pepto-Bismol. Individual bowel habits, your age (the intestinal tract slows down with age), and the amount of the product taken all help to determine how long Pepto-Bismol is in your system.
Posted on: Tue, 28 Oct 2014 21:30:18 +0000

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