Pepto-Bismol is a common over-the-counter medication used to treat upset stomachs. While generally safe, one noticeable side effect can be black stools. This article explains why Pepto-Bismol can cause this discoloration and when you should be concerned.
The Science Behind Black Poop
The active ingredient in Pepto-Bismol is bismuth subsalicylate. When bismuth comes into contact with sulfur in your saliva and digestive system, a chemical reaction occurs. This reaction creates bismuth sulfide, a harmless black compound.
Bismuth sulfide is not absorbed by the body and passes through your digestive tract. As it moves through your intestines, it can temporarily darken the color of your stool, resulting in black poop. This is a normal side effect and usually nothing to worry about. This discoloration can also affect your tongue, making it appear black as well.
How Long Does Black Poop Last?
The black stool discoloration typically disappears within a few days after you stop taking Pepto-Bismol. The bismuth sulfide needs time to work its way out of your system completely. However, in some cases, it might take a bit longer for your stool to return to its normal color.
When to See a Doctor
While black stool from Pepto-Bismol is usually harmless, there are instances where it’s best to consult a doctor. If your stool remains black for several days after you’ve stopped taking the medication, it’s advisable to seek medical advice.
Additionally, black stools can sometimes indicate more serious underlying medical conditions. If you experience black stool accompanied by other symptoms such as abdominal pain, vomiting, fever, or blood in your stool, seek immediate medical attention. These symptoms could signal a different problem unrelated to Pepto-Bismol.
Important Considerations
Always follow the recommended dosage instructions on the Pepto-Bismol packaging. Taking more than the recommended dose won’t provide additional relief and could increase the likelihood of side effects, including more pronounced stool discoloration.
Conclusion
Black poop after taking Pepto-Bismol is a common and generally harmless side effect caused by the chemical reaction between bismuth and sulfur in your body. The discoloration is temporary and should resolve within a few days of stopping the medication. However, if the black stool persists or you experience other concerning symptoms, consult your doctor.
