There are hundreds of ways to lose weight why would you even go for a drug like that. I had a friend taking that drug and it caused her trouble sleeping, dizziness and anxiety.
This is one of those 'they want a pill to do everything' kind of threads. People go and get gastric bands thinking it's THE answer then blend their pizzas to get the cals in and wonder why they are still fat. Their reasoning becomes 'it didn't work for me'. No it works fine - you're just a greedy c**t.
Now almost every pill you can get which says it works comes with a bunch of nasty side effects (QED: Olisat (sp??) - gives you oily shits and 'leakage').
What NONE do is come with a side effect of boosting the will power that you lack.
Want to lose weight (any kind) - eat less. Want to lose fat? Exercise more. Lost weight but gained it back after 'the diet' - stay on a LOWER amount after. It's NEVER gonna work if you do (for example) 8 weeks of lower cals and then go back to the very same amount you ate before when you were fat etc etc.
No diet pill makes anything other than a short time difference.