A member asked:

I am taking iron for my anemia, i am now pooping black is that normal? i started taking iron supplimnets 2 days ago, 345 mg twice per day, now my poop is black, is that normal?

3 doctors weighed in across 4 answers

Iron : Iron supplements can cause your stool to be black. This is a very common side effect while taking iron. The reason is simple, the unabsorbed iron passes through the feces thus causing the darkening. This is actually a good sign because we know it is working. Make sure to follow up with your doctor to make sure your anemia is resolving. Take care.

Answered 11/9/2019

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Agree with Dr. J: If you are unable to tolerate oral iron, talk to your doctor about intravenous iron. All of your deficiency could be corrected with one treatment.

Answered 1/1/2019

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Dr. Heidi Fowler answered

Specializes in Psychiatry

Hello. : Hello. Yes. Iron supplements can cause stool to become black. Black, tarry, foul smelling stool is consistent with gastrointestinal bleeding.

Answered 1/1/2019

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Agree with Dr. F.: If you are unable to tolerate oral iron, talk to your doctor about taking iron intravenously, one treatment may be sufficient to replace your iron stores.

Answered 1/1/2019

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