Pepto Bismol, a common remedy for upset stomachs and diarrhea, can sometimes cause a black tongue or black stools. This discoloration is due to the interaction between bismuth, the active ingredient in Pepto Bismol, and sulfur, which is naturally present in your mouth and digestive tract.
When you take Pepto Bismol, the bismuth combines with sulfur to form bismuth sulfide, a black-colored substance. This reaction happens first in your mouth, which is why you may notice a black coating on your tongue before experiencing any changes in stool color. The amount of sulfur in your system will determine the extent of the discoloration.
As Pepto Bismol travels through your digestive system, it continues to coat and soothe your stomach, providing relief from your symptoms. The bismuth sulfide formed in your mouth will eventually pass through your digestive tract and be eliminated in your stool, potentially causing black stools.
While a black tongue or black stools after taking Pepto Bismol can be alarming, it’s important to understand that this discoloration is temporary and harmless. It typically disappears within a few days after you stop taking the medication. Factors like individual bowel habits, age, and the amount of Pepto Bismol taken can influence how long the discoloration lasts.
Pepto Bismol products undergo extensive development and testing to ensure their safety. However, if you have any concerns about the side effects or experience persistent discoloration, it’s always best to consult your healthcare provider. They can address your specific concerns and provide personalized advice.
