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Plavix turns stool black
PKnoll posted:
recently had a heart stent and prescribed Plavix, however I have notice that it turns by stool Black. Just to make sure I eliminated the Plavix for two days, and stool returned to normal. Is this normal reaction to taking Plavix ?
OldCoach1942 responded:
Just a lay person here, but a black, tarry stool often indicates internal bleeding in the intestine, and I would call your doctor ASAP and get some medical advice. If I am correct, this is Not A Good Sign and you need a medical professional to advise you on what to do.

As you know, Plavix thins your blood and is often prescribed after a stent to help prevent blood clots, but it sounds like it is not a good medication for you, IMHO.
James_Beckerman_MD responded:
I would be concerned that the dark color of your stool could represent blood. You should let your doctor know so that it can be tested.
Railowel responded:
I too am wondering if this is normal - have been taking Plavix for a few days and just noticed the black stools.
billh99 replied to Railowel's response:
No, it is not normal. You need to report this to your doctor.
Railowel replied to Railowel's response:
O.K. - for those of you who read my previous post - I discovered the source of my black stools wasn't the plavix - the culprit was the Pepto Bismo I took for a upset stomach. Large sigh of relief-
cardiostarusa1 replied to Railowel's response:
Thanks for the update Railowel. =D

Take care,


WebMD member (since 8/99)



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WebMD/WebMD forums does not provide medical advice, diagnosis or treatment.

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