I know some people who have had luck with the brands that have ephedra in them. However, the safety of these suppressants is always up for debate. I have tried them myself and found that they did help with appetitie, but they gave me a headache which scared me, so I quit taking them. You could give them a try and see how they affect you.
The most well known brand is Metabolife, but I tried a knock-off brand from Wal-Mart called Metab-O-Lite. Good luck, but be careful! Just be sure and not drink a lot of caffein with them, as I believe that is what causes them to be the most dangerous.