M.R.
Well, Alli claims to help you lose an addition what, 10% while maintaining a healthy nutrition plan. So...if you want to lose 10 pounds, you'll get a whopping 1 more pound. If you want to lose 25 pounds, that's a big ole 2.5 extra.
Not worth the potential damage you do to your body, your clothing, and your self-esteem when you poop your pants.