Rifaximin is used to treat diarrhea caused by the common bacteria known as E.coli

Rifaximin is used to treat diarrhea caused by the common bacteria known as E.coli ("traveler's diarrhea"). Rifaximin should not be used if you have a fever or bloody diarrhea. This medication stays in the digestive system and is not absorbed into the blood. It works by stopping the growth of bacteria.