RIFAXIMIN

CHAPEL HILL, N.C. – A pair of clinical trials, conducted in part at the University of North Carolina at Chapel Hill, found that two weeks of treatment with.
In two large studies, 41 percent of the patients who took the antibiotic rifaximin said their symptoms substantially improved, compared to 32 percent of those who got fake pills. Their relief lasted for up to 10 weeks. ...
Over the past week we had 2 patients with hepatic encephalopathy. One patient responded nicely to oral lactulose, but the other remained encephalopathic despite 2-3 stools daily for a week. We considered several possibilities.

Rifaximin in WIKIPEDIA