My experience with diet pills was not good. I ordered some online at this site as was feeling fed up, they were Chinese type ones, and I really had no idea what was in them. They made me feel ill, irritable and generally unwell.
I know for sure that before taking pills you absolutely should talk to your doctor!
Also check this link, maybe it can help you to make choice:
http://theglowdetoxdiet.com/diet-pills-that-work-fast-medically-proven-weight-loss-supplements/