the phentermine gives a kick in the ass in the a.m, I think my tolerance has already built up to it. The appetite supressant part only worked for maybe the first day or two and the whole wired feeling all day wore off after maybe the first week. Like i mentioned earlier it really just gives me a energy boost first thing in the a.m but by noon i dont feel it at all. I am able to get all my meals in, calories, fat intake, carbs/protein ratio etc etc