I want the Best Weight Loss Pills!

I have to lose some weight. My friend is trying to lose weight too, and she bought some over the counter appetite suppressant pills. The problem is they are made from herbs. I have trouble with some herbs so I am hesitant to try the kind she has. I think I just need to research which are the best weight loss pills. I know everyone one has a different opinion so does anyone know of a website that compares them? If you do please let me know.