"i have been taking phentermine (30mg) for 5 weeks now and i am down 10lbs! slow and steady! i&#039;ve been overweight my whole life, have tried every kind of diet plan out there. i know how to cook healthy, i know about portion control, i know exercise is key....but i just needed that little something to keep me on track and phentermine is it!  i read a lot of other reviews on here and those who are saying that they gained all the weight back once they stopped, i can guarantee they were not eating healthy while taking this medication. you have to eat! this has really helped with my snacking and when i do eat i don&#039;t feel like i have to eat the entire plate. this isn&#039;t a magic pill- you have to eat right and exercise!! good luck!"