Some background information: alli is the first FDA approved diet pill. It works by blocking the absorption of fat. From their webpage:
myalli.com - what are treatment effects?
You may feel an urgent need to go to the bathroom. Until you have a sense of any treatment effects, it's probably a smart idea to wear dark pants, and bring a change of clothes with you to work
I shit you not.
There are some other good ones too.
You may not usually get gassy, but it's a possibility when you take alli. The bathroom is really the best place to go when that happens
Yummy! Time to get thin.