I have been taking it for over a year. I have lost 15 lbs, but honestly I think I did myself in the gym and sticking to a strict meal plan w/my trainer. I just have been afraid to stop taking it. A friend of mine had to go on a medication where she gained 35 lbs quickly. She was given Phetermine short term and quickly dropped the weight.
{ADDED} ohhh and I forgot to mention.. my friend, she doesn't workout or diet. In fact the opposite. Kind of annoying, she is one of those that naturally thin girls that drinks like a fish and eats fast food. Yet I eat clean and bust my ass in the in gym - yet I would not have it any other way!
She swears by Phentermine, but her Dr. will only give to his patients up to 60-days.