Adipex-P works by suppressing the appetite, thereby reducing the amount of food consumed and ultimately leading to weight loss. It is a stimulant that is similar to an amphetamine, and it affects the central nervous system, increasing the heart rate and blood pressure. This medication is typically prescribed for short-term use, usually for a few weeks, and is often used in conjunction with a comprehensive weight loss program that includes a healthy diet and regular exercise.

The active ingredient in Adipex-P, phentermine, is a controlled substance in the United States, and it is classified as a Schedule IV drug by the Drug Enforcement Administration (DEA). This classification indicates that the drug has a potential for abuse and dependence, although the risk is considered to be relatively low.