Phentermine is a prescription medication used for short-term weight loss management in individuals who are overweight or obese. It is classified as a sympathomimetic amine and works as an appetite suppressant by affecting certain chemicals in the brain that control hunger signals.

Phentermine is typically prescribed in combination with a reduced-calorie diet and exercise to promote weight loss. It is intended for use in the short term, generally a few weeks to a few months, as it can lose its effectiveness over time. The dosage and treatment duration will be determined by a healthcare professional based on the individual's needs and response to the medication.

As an appetite suppressant, phentermine can help reduce food cravings and increase feelings of fullness. This can support adherence to a calorie-restricted diet and facilitate weight loss. However, it is important to note that phentermine should only be used under the guidance and supervision of a healthcare professional, as it can have potential side effects and risks.