"i started phentermine about 3 weeks ago and lost 10 lbs so far but may be more and definitely the inches are gone, but starting yesterday i started experiencing some chest pains and shortness of breath and its like a little pressure sitting on my chest/lungs. my doctor appointment is not until tuesday but i will stop for now. i hate that because these pills do work, i have more energy, eating way less. i was just hungry all the time for no reason and it was hard for me to lose weight, exercising daily. my mom uses them and she hasn&#039;t had any side effects. she has lost 21 lbs so far. so my doctor may take me off, so if that%u2019s the case i will definitely have to buckle down and stay focused to lose the weight. good luck to everyone else."