"i have been taking phentermine since april 13, 2010 under my doctor&#039;s care.  i am 5&#039; and 150 lbs.  that is a lot of weight for my small frame and my joints were constantly hurting.   eleven days later when i returned to my doctor, i had lost 5 lbs and i feel great.  already, my clothes are looser.   i have been doing some exercise when i get the time, usually 2-3 times a week.  i also have been eating 5 times a day.  for every carb, i eat two proteins, and i drink lots of water.  the only side effects i have is dizziness if i don&#039;t eat regularly.  i can&#039;t tell if i have sleeplessness because i don&#039;t sleep very well anyway.  i&#039;m very excited about my weight loss and hope when i lose the 25 lbs i will be able maintain it."