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Doctors' Answers to "Frequently Asked Questions" - Giardia
Giardia [posted 8/11/98]
Answer: There have been reports of resistant giardia. Usually, larger doses will fix the problem, but you may need to check for resistance. For this you will need a sophisticated microbiology lab. Increase the dosage to 750 mg three times a day for 2 weeks. If it returns you'll need an upper GI with a small bowel follow through (an x-ray) if there is no mechanical problem in your small intestine, check for the resistance.