Active substance

Rifaximin

4 products from 3 companies contain this in United States.

4 prescription onlyTablet

Prescription only

Xifaxan200 mgPrescription onlyTablet A-S Medication Solutions · Rifaximin Xifaxan550 mgPrescription onlyTablet Cardinal Health 107, LLC · Rifaximin Xifaxan200 mgPrescription onlyTablet Salix Pharmaceuticals, Inc. · Rifaximin Xifaxan550 mgPrescription onlyTablet Salix Pharmaceuticals, Inc. · Rifaximin

Same substance is not the same product. Strength, form, release mechanism and other ingredients all differ. Whether one can replace another is a decision for a pharmacist.