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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Can Taking Metronidazole Result In Black And Green Stool?

I am on metronidazole 3 times a day for an intestinal parasite infection. I have taken this a couple months ago for the same infection. Right now I am experiencing black and green stools. Should I be concerned? The stools are not like diarrhea but are not super solid either.
Mon, 5 Jan 2015
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General & Family Physician 's  Response
Hello,
Metronidazole can cause black stools and hence there is nothing to worry.
It will go away once the treatment is completed and metronidazole stopped.
Thanks
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Can Taking Metronidazole Result In Black And Green Stool?

Hello, Metronidazole can cause black stools and hence there is nothing to worry. It will go away once the treatment is completed and metronidazole stopped. Thanks