While eating a well-balanced, reduced-calorie diet and exercising regularly are the cornerstones of weight loss, certain drugs can serve as powerful adjuncts.One such drug is phentermine — one of the most popular weight loss drugs in the world.It has been proven effective for short-term weight loss when used alongside a reduced-calorie diet and exercise.

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Although phentermine is one of the most commonly prescribed weight-loss medications, it isn't a good option if you have heart disease, high blood pressure, an overactive thyroid gland or glaucoma. It also isn't for women who are pregnant, may become pregnant or are breast-feeding.