I have been experiencing abdominal pain and diarrhea for the past 2 days. My stool test shows infection with Giardia lamblia. My doctor prescribed Ornidazole 500 mg, 2 tablets per day for 5 days. I would like to know whether Metronidazole is more effective than Ornidazole, or if Ornidazole alone is sufficient for treating this infection.

Answered by 1 Apollo Doctors

Dr Ezhilarasan Ml

General Practitioner

MBBS
6+ Yrs

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Both are effective. Ornidazole has a longer half life and fewer doses. If prescribed, it is safe to continue as advised by your doctor.

Dr. Ezhilarasan Suggests...

Take a STOOL EXAMINATION, PH & REDUCING SUBSTANCES Test

Book STOOL EXAMINATION, PH & REDUCING SUBSTANCES Test

Answered 05/09/2025

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