I tried Zantrax-3 in June of 2003, my starting weight was 212.50 and after taking it for about 6 weeks I lost a total of 12 lbs. I had to stop taking it because I was taking prozac and together it didn't work very well. I was always jittery and had a rapid heart beat. After I stopped taking prozac, I tried to take zantrax again but didn't seem to work for me the second time around. I think zantrax just like any other diet pill will work at the beginning but after a while, your body gets used to it and if you don't change your eating habits and start excircising then you will stop loosing weight. I recommend everyone that wants to loose weight and want to use a diet pill, do not let the diet pill do the work for you, instead, use it only as a motivator to do it on your own. The pill will help you loose it faster but you can gain it just as fast if you don't have a diet plan to go with it