Phentermine will causes weight loss by suppressing appetite. The amount of weight loss varies widely between users. Average weight loss ranges from 2 to 13 lbs. Phentermine needs to be combined with diet and exercise to maximize weight loss.
Since Phentermine is an amphetamine derivative, it has similar side effects. Heyden pointed out a few of the side effects. Like all amphetamines, Phentermine can be habit forming and should not be used for more than a few weeks.
Phentermine should only be taken under the supervision of a physician.