"i lost 65 lbs in about 6 months with diethylpropion, along with exercising and eating healthy. it really made a difference in helping me lose the weight. i maintained my weight for over a year without the medicine by exercising regularly and watching what i ate, but i haven&#039;t been very good about my routine lately and just found out i gained 20 lbs over the last 6 months so i just got a new prescription again."