Rexigut 400mg contains (Rifaximin) Decreasing the risk that hepatic encephalopathy (a serious liver problem) will occur again in patients who have already had it. It may be used for other conditions as determined by your doctor.
Rifaximin is an antibiotic. Exactly how it works to treat hepatic encephalopathy is not known. It is thought to have an effect on the bacteria in the stomach.