Xifaxan (rifaximin) is used to treat traveler's diarrhea and irritable bowel syndrome with diarrhea. It is also used to prevent hepatic encephalopathy, a brain disorder that can occur due to severe liver disease. Xifaxan is a rifamycin which works by killing bacteria that causes infection. The most common form of Xifaxan is a 550mg tablet. It is also available as a 200mg tablet. There are currently no generic alternatives for Xifaxan. It is covered by some Medicare and insurance plans, but some pharmacy coupons or cash prices may be lower.

With the Patient Assistance Program from Salix Pharmaceuticals, you can receive your medication at no cost.