i have never been on presrciption diet pills.I'm so afraid of spending alot of money on something that may not work for me.None of these pills offer money back if it doesn't work.This really worries me.I'm interested in taking xenical and wondering the cheapest site to buy it and will it work? I have turned to xenical becuse i'm truly desperate to lose weight.I wanted to get gastric-bypass but no way will i be able to afford it.Please give me your best advice because i really want to be slimmer.