I recently started taking phentermine two weeks ago at a weight of 241 and have lost 11pounds, weighing 230 lbs. My goal is to lose 40 pounds by May 5th 2013 for my graduation. I seem to not have a appetite. I probably consume 500-800 calories per day. I work out 4-5 times a work for 3 hours a day. What is a faster way for me to lose the weight by my date I've chosen.