You might want to try what I am on. I take Wellbutrin for my weight loss. I started this April 17, 2008 and have lost 38 pounds as of today. I'm also on the Phentermine, but it's not for my weight loss, but for my cholesterol. I started taking this in late May. Now my doctor wants to slowly take me off of it, which is fine by me. I know that Wellbutrin was originally used as an anti-depressant, but it has the same effect as the Phentermine, but without all the side effects. I take 30mg of Wellbutrin in the morning and every other day 30mg of Phentermine early in the afternoon. This month alone I have lost 10 pounds. You don't want to lose the weight too fast, the faster you lose it, the faster it comes back on. Lose it slowly and it will stay off longer.
I hope this helps. Any other questions, feel free to ask. Good Luck.