Phentermine is used as part of a short-term plan, along with a low calorie diet, for weight reduction. It is used in obese patients who have not been able to lose weight with diet and exercise alone. Phentermine belongs to the group of medicines known as appetite suppressants.
Take this medicine only as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered. If you take too much of this medicine, it may become habit-forming (causing mental or physical dependence). This medicine is available in four forms: capsules, disintegrating tablets, extended-release capsules, and tablets. Carefully follow the dosing instructions for the form you are using. Swallow the extended-release capsule whole. Do not crush, break, or chew it.