irritable bowel syndrome
"As of today I can safely say that Viberzi has totally stopped working.  I'm going back on two weeks of Xifaxan generic (rifaximin) 550mg three times a day.  it has not been easy with Viberzi  as others on here have said... I had incredibly painful cramps at first.  The gastro said it'd be OK to experiment with dosage. I eventually got to a good place of 100mg in morning and 50mg at nite. It mostly worked for two months but now it's done. so I'm sad. I hope the rifaximin will work  now that I have been off of it for several months."