Giardiasis

It can be expected that parasites will be cleared from the stool in 3 to 5 days and that symptoms will resolve in 5 to 7 days.

If the symptoms do not abate, the patient should be assessed for treatment failure, lactose intolerance, or post-infectious irritable bowel syndrome. Gastroenterology consultation can be considered for selected patients.

If resistance or relapse has occurred, treatment with a drug of a different class or combination therapy for at least 2 weeks should eradicate infection.