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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Diarrhea With Blood And Black Stool While On Antibiotics?

I had to go to the ER 2 days ago for extremely bad anal pain. I have a history of chronic hemorrhoids but the doctor said it wasn t that. It was an infection. He actually asked me if I had anal sex. I got pissed about that, anyway, I had a ct scan and all was good. I am on 2 different antibiotics for 7 days. I also take vitamins B complex. . I took milk of magnesia last night to help. Today I noticed that my diarrhea was blood, dark and ashy. Could it be a side affect of the meds? I also have high liver enzymes as well due to drinking way too much. I got a good lecture, maybe I m just being over reactive.
Tue, 30 Jul 2019
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Internal Medicine Specialist,  's  Response
Hi,

Antibiotic orally can cause Clostridium difficile infection (CDI) causing diarrhea and pseudomembranous colitis (PMC) in the most severe cases. Stool for toxin A or B or toxin-producing C. difficile detected in the stool by PCR or culture can confirm the diagnosis. Treatment will follow accordingly.

Hope I have answered your query. Let me know if I can assist you further.

Regards,
Dr. Tushar Kanti Biswas, Internal Medicine Specialist
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What Causes Diarrhea With Blood And Black Stool While On Antibiotics?

Hi, Antibiotic orally can cause Clostridium difficile infection (CDI) causing diarrhea and pseudomembranous colitis (PMC) in the most severe cases. Stool for toxin A or B or toxin-producing C. difficile detected in the stool by PCR or culture can confirm the diagnosis. Treatment will follow accordingly. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Tushar Kanti Biswas, Internal Medicine Specialist