I have been on Zelnorm for IBS constipation for about 1.5 years. The meds definitely make my bowels move sometimes too much. When I take the medicine I have diarrhea but if I don't take it I am constipated. The problem that I have is chronic gas. I stand and pass gas, I walk and pass uncontrollable gas. The odor is not pleasant and is very embarassing. Does anyone have this problem or a solution.