When i was in Hong Kong many moons ago,they had one that you could buy over the counter at the chemist ( cant remember name), i was really ill and swore i would never take them again.Years later back in UK it came up on the news as one among many that was dangerous to take! I wouldnt take any now!
I think they can work but you still have to control yourself. I usually don't overeat because I'm hungry I do it because I'm bored & a pill can't control that. I personally can't take diet pills they hurt my stomach bad & I get really sick feeling. So if caffeine bothers you then the pills will really bother you.
I completely agree with you Kari I didn't start dieting until my mid 30's and every since I've gained more weight. I think the worsat thing I did was the low low carb thing because when you start eating carbs you gain more back.The best smartest thing to do is exercise more & eat healthier less fattening foods.