I have been on phent for a little over a week now. At first it was great it had so much energy and didn't feel sick or have headaches like I did with diet pills. It suppresses my appietite, however, I am forcing myself to each 5-6 small balanced meals a day and do cardio 4-5 times a week w/weight training. I have been noticing that it is not having the same effect as it did in the begining. I am hungry all the time, which I think is because I am eating many small meals and keeping my metabolism running and toward the middle of the day I feel like I just want to crawl into bed and fall asleep. I am constantly tired and groggy. Has anyone had this effect before?