have they tested you for chron's disease or colitis?
I met a lady in Houston a few years ago. She said she had had chronic diarrhea all her life, and had been scheduled for surgery when she started doing an exercise from the Dahn Hak system called "Intestine Exercise."
She claims that after two weeks, the diarrhea went away and had not come back in two years.
Intestine Exercise is a simple thing, easy to learn and easy to do. I would venture that it is worth a try.
You could Google Dahn Hak and look for it, join a local center, or just stand easy, place your hands on your belly button, and gently, slowly, suck in your gut and release it, 300 times every morning. Be aware of sucking in your belly, your sides, your back. That's it.
Can't say without evaluation.
I'm sure that tests like a colonoscopy, stool analysis for malabsorption and blood tests to exclude celiac disease have all been done or considered.
Otherwise, optimizing treatment for irritable bowel can be considered. You have already tried the Rifaxmin. Trials of tricyclic medications or antispasmodic agents can be considered next.
This answer is not intended as and does not substitute for medical advice - the information presented is for patients education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
www.kevinmd.com