Hi Chantay~~I have'nt tried xenical,however my mom did a few years back,She could'nt last 3 weeks on it cuz (tmi ahead)she would have bowel movements and not even know it,until "it" happenedIf you do go on it you absolutely have to avoid "fatty" foods cuz if you don't...(bring a change of undies)..just my 2 cents..good luck

...Kim