"i have been taking phentermine for exactly a week today and i&#039;ve lost 8 pounds, going from 182lbs to 174lbs. i&#039;m so excited and hopeful. the only side effect that i experienced was a little sleeplessness, but it subsided after three days.  i can&#039;t believe how much energy i have and the advantage this gives me over what i eat. i&#039;m learning how to eat right and exercise daily. only 42 pounds to go!"