Rifaximin Dosage

Generic name: rifaximin
Brand name: Xifaxan
Drug class: Miscellaneous antibiotics

Medically reviewed by  A Ras MD.

 Recommended Adult Dosing

Dosage forms:  TAB: 200 mg, 550 mg

Traveler’s diarrhea, E. coli-induced

[200 mg PO tid x3 days]

Hepatic encephalopathy

[550 mg PO bid]

IBS, diarrhea-predominant

[550 mg PO tid x14 days]

Info: may repeat dose up to 2x if recurrent dz

Recurrent C. difficile infection, adjunct

[400 mg PO tid x20 days]

Info: for 2 or more recurrences; give after 10 days of vancomycin PO

Renal dosing

[not defined]

renal impairment: not defined

HD/PD: not defined

Hepatic dosing

Child-Pugh Class A or B: no adjustment; Child-Pugh Class C: caution advised

SRC: NLM .