Phentermine
"Pros:  Not too much stomach discomfort, even with an ulcer and irritable bowel syndrome, alters your craving for food - instead of fries, it's fruit. I've lost 82 pounds so far, with only 20 to go.

Cons: It alters your cravings, not sheds the weight for you. It must accompany a change in lifestyle. I had trouble with increased heart rate and I'm in my 20's with no heart problems. I was even unable to donate blood because the rate was too high. This stabilizes every time I go off the medicine. It also can make me restless. When my husband and I were both on it, we fought like crazy all the time. I thought I was crazy, but each time we would stop taking it, the fighting would decrease."