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What Causes Diarrhea And Stomach Cramps After Taking Keflex?

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Posted on Thu, 3 Nov 2016
Question: I took keflex 500 mg 4x a day for ten days seven weeks ago, I still have diahrrea and stomach cramps. Is this normal?
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Answered by Dr. Rahul Tawde (1 hour later)
Brief Answer:
Stool culture and abdominal ultrasound recommended as following....

Detailed Answer:
Hi,

I understand your concern.

Keflex is an antibiotic used to treat bacterial infection. One of its side effects is alteration in normal flora of the intestines.

If diarrhea and stomach cramps started after taking Keflex, this could be due to its side effects. Apart probiotics and yogurt, I'd suggest to run culture of stool sample to rule out pathological bacteria (c.difficile and/or candida overgrowth).
If confirmed, metronidazole and nystatin to start accordingly but need prescription.

If you had diarrhea and stomach cramps before started keflex, then, lab tests (stool culture) and abdominal ultrasound recommended for more accurate evaluation before starting specific treatment.

Let me know if you have further queries.
Dr.Sejdini
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Above answer was peer-reviewed by : Dr. Yogesh D
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Answered by
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Dr. Rahul Tawde

General & Family Physician

Practicing since :1980

Answered : 1 Question

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What Causes Diarrhea And Stomach Cramps After Taking Keflex?

Brief Answer: Stool culture and abdominal ultrasound recommended as following.... Detailed Answer: Hi, I understand your concern. Keflex is an antibiotic used to treat bacterial infection. One of its side effects is alteration in normal flora of the intestines. If diarrhea and stomach cramps started after taking Keflex, this could be due to its side effects. Apart probiotics and yogurt, I'd suggest to run culture of stool sample to rule out pathological bacteria (c.difficile and/or candida overgrowth). If confirmed, metronidazole and nystatin to start accordingly but need prescription. If you had diarrhea and stomach cramps before started keflex, then, lab tests (stool culture) and abdominal ultrasound recommended for more accurate evaluation before starting specific treatment. Let me know if you have further queries. Dr.Sejdini