You have not mentioned why you are taking Flagyl.
Flagyl hardly causes diarrhea.
Do a stool analysis for evaluation.
Infectious diarrhea may need a course of antibiotics.
Probiotic supplements would be helpful
How long have u been taking the drug?? Is this the first time using it? Flagyl is specific for bowel disorders. Meds like ampicillin and other antibiotics are usually not effective for bowel disorders. I would measure the level of the discomfort and then call the prescribing Doctor. Sometimes things have to get worse in order to get a lot better-Best of Luck---
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