"i was on phentermine 3 years ago and lost 150lbs in a year and a half.  i worked out and because it curbs your appetite i could eat healthier.  you really need to work out and use it as a tool to help you with your new lifestyle because if you don&#039;t the weight will come back on plus more.  i kept it off for 3 years but then had a job change that kept me from going to the gym in the morning &amp; afternoons and didn&#039;t work out with the kids. i gained 150 lbs back in 3 years.  i just started again on 08/12 and have lost 25lbs. i haven&#039;t got into a steady gym routine now but it&#039;s motivated me to go to the gym in the afternoons.  i chose a different center for the gym because my kids can play basketball or swim while i work out."