RIFAXIMIN (ri FAX i men) treats diarrhea caused by bacteria. It may also be used to treat irritable bowel syndrome (IBS) with diarrhea. It can be used to prevent hepatic encephalopathy, a condition where the liver does not clear toxins from the body. It works by killing or preventing the growth of bacteria in your intestines that make toxins. It belongs to a group of medications called antibiotics. It will not treat colds, the flu, or infections caused by viruses.


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