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Doctor insights on: Can Pepto Bismol Cause Me To Have Black Stools As Well As Constipation

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Can pepto bismol (bismuth subsalicylate) cause me to have black stools as well as constipation?

Can pepto bismol (bismuth subsalicylate) cause me to have black stools as well as constipation?

Yes, yes: Bismuth, the main ingredient in pepto bismol, (bismuth subsalicylate) will turn the stools black transiently and may lead to temporary constipation. Ifr the black stools continue days after use of pepto, you need to see a GI doctor to be evaluated for an upper GI source of bleeding from your stomach which will also cause the stools to be black. ...Read more

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Dr. Andrew Seibert
319 doctors shared insights

Melena (Definition)

Melina is blood in the stool that is black, tarry, sticky, and smelly. The blood in melena comes from high up in the gastrointestinal tract, and gets partially digested which is why it changes to melena. Bright red blood comes from lower ...Read more


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Hello, I took Pepto-Bismol twice on Thursday and once on Friday, but I am still having black stools. Today is Monday. Is this normal?

Hello,  I took Pepto-Bismol twice on Thursday and once on Friday, but I am still having black stools. Today is Monday. Is this normal?

Black stools: can be indicative of poorly digested food or excess fat in your stool - most seriously, they are associated with bleeding in your gastrointestinal tract. Epigastric burning in concert with black stools warrants an evaluation by a doctor. ...Read more

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Should i be concerned about taking pepto bismol (bismuth subsalicylate) and have loose black stool?

Should i be concerned about taking pepto bismol (bismuth subsalicylate) and have loose black stool?

Pepto bismal ; other: Meds that contain bismuth can turn stool black. If you have black, tarry, malodorous stool it may be melena or GI bleeding (which would require prompt medical attention).. ...Read more

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Saturday night I began to feel stomach pain with diareah. I drank pepto bismol (bismuth subsalicylate) once that night and since then I have black stool. It is now Tuesday.

Saturday night I began to feel stomach pain with diareah. I drank pepto bismol (bismuth subsalicylate) once that night and since then I have black stool. It is now Tuesday.

May be Pepto, but...: Dark-colored stools may result from iron supplements, foods you eat (like a lot of spinach), substances (like peptobismol), but most significantly suggests bleeding. When blood is denatured by acid in your stomach, as from ulcers, stools will turn tarry ("melena"). Blood may also be ingested from nose bleeds, bleeding gums. Stop any nsaid's you're taking, & ask your doctor to rule out occult blood ...Read more

Dr. Janice Alexander
258 doctors shared insights

Pepto Bismol (Definition)

Pepto-Bismol is an anti-diarrheal agent which is a ...Read more


Dr. Eric Kaplan
2,395 doctors shared insights

Constipation (Definition)

Constipation is difficulty passing ...Read more