2 1/2 yrs ago I took zenical for about 4 months and ever since then I have had serious problems going to the restroom, constantly needing to go and not being able to, or just going a little bit. also at times my stomach is just rolling and rolling as if I had to go and when I try, nothing or very little comes out and when it does it is usually very loose and very very soft and very little compared with what is normal, I am scared to even go out in public because I may not make it to the restroom in time or when I do go I am sitting in there for 30,40, and even 60 to 100 minutes at a time. I have been to my doctor several times and he has found nothing wrong, he then sent me to have a colinoscopy and they have not found anything wrong, can you help me figure this out? I have tried fiber, water, colin cleanse, change of diet, so far nothing works. This is really depressing me and keeping me from living my life, please help!!!!