Has anyone who participated in the clinical trials for Cilansetron experienced the same problems many of us encountered with Lotronex?In my case, Lotronex was only minimally effective, and the 'positive' effects lasted just four or five months. Although I didn't develop IC, I began to experience severe back, leg and abdominal pain - all of which subsided within weeks of discontinuing Lotronx. I have posted this question elsewhere on this b/b - and the answer I usually get is that 'while both drugs are in the same 'class' - they may not necessarily work in the same way. THAT'S what I'm trying to ascertain; Has anyone who had problems with Lotronex NOT had similar problems with Cilansetron??