Rifaximin (Rifagut) is a semisynthetic antibiotic based on oral bioavailability, meaning that very little of the drug will be absorbed into the blood stream when it is taken orally.
Rifaximin (Rifagut) is a semisynthetic antibiotic based on rifamycin. It has poor oral bioavailability, meaning that very little of the drug will be absorbed into the blood stream when it is taken orally.