U.S. doctors online nowAsk doctors free
A 35-year-old member asked:

What causes black stool?

1 doctor answer2 doctors weighed in
Dr. Heidi Fowler
Psychiatry 25 years experience
Sometimes it is: caused by things like iron supplementation or Peptobismal. If there is black, tarry malodorous stool it could be GI bleeding and should prompt medical evaluation. Take care.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership

Similar questions

A 39-year-old member asked:

What is a common cause for black stool?

1 doctor answer3 doctors weighed in
Dr. Eric Kaplan
Colon and Rectal Surgery 42 years experience
Variable: But most concerning is a bleeding site in the upper GI tract which turns black when exposed to gastric acids. This can progress very rapidly to a very serious and life threatening situation. Non serious causes can be any meds containing bismuth such as pepto bismol (bismuth subsalicylate) and certain foods. You should see your doctor promptly for evaluation and referral if indicated.
A 49-year-old member asked:

What causes black stools?

1 doctor answer2 doctors weighed in
Dr. Barry Marged
A Verified Doctoranswered
A US doctor answeredLearn more
Blood: Black stools or melena, is always considered blood. It usually comes from the stomach or the beginning parts [higher up in our jargon] of the small intestine. Bleeding from colon usually comes out red. Black or red stools need to be investigated.
Dr. Shontae Buffington
Pediatrics 17 years experience
Aslo bismuth containing products like Pepto-Bismol can cause black tarry stools.
Apr 8, 2014
A 32-year-old member asked:

Can eating oreo black cause you to have black stool?

1 doctor answer2 doctors weighed in
Dr. Eric Kaplan
Colon and Rectal Surgery 42 years experience
If you: Enough of them yes and due mostly to the artificial food coloring and chemicals in packaged cookies. Eat healthier home baked cookies, in general better for you than store bought packaged cookies. Too many preservatives and other things that potentially are causing long term consequences and harm.
A 35-year-old member asked:

Can an antibiotic cause black stool?

1 doctor answer3 doctors weighed in
Dr. Heidi Fowler
Psychiatry 25 years experience
I don't specifically: Know of one that causes black stool. If stool is black, tarry and malodorous that could be melena (gi bleed). That would require prompt medical evaluation.
A 31-year-old member asked:

Can antibiotics cause black stool?

1 doctor answer5 doctors weighed in
Dr. Gurmukh Singh
Pathology 49 years experience
Not likely: If you have tarry black stool, see your doctor asap, as it is an indication of bleeding in the intestine.

Related questions

A 35-year-old member asked:
1 doctor answer3 doctors weighed in
A member asked:
1 doctor answer3 doctors weighed in
A 39-year-old member asked:
1 doctor answer2 doctors weighed in

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership
Last updated Nov 13, 2014

People also asked

Related topics

Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $39!
50% off with $15/month membership

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.