what meds treat giardia?
Medications used to treat Giardia infection include tinidazole and nitazoxanide. Treatment also generally involves additional rest as needed and ensuring adequate hydration to prevent dehydration. This may be achieved by drinking water or an oral rehydrating fluid, such as Pedialyte.
1 Metronidazole (Flagyl). Metronidazole is the most commonly used antibiotic for giardia infection. Side effects may include nausea and a metallic taste in the mouth. Don't drink alcohol while taking this medication.  Tinidazole (Tindamax).