A single, translucent golden teardrop-shaped liquid gel capsule on a plain white background.

Phentermine

Also known as: Ionamin, Phentermine Hydrochloride, Fastin, Adipex-P, Lomaira, Duromine

Phentermine is a prescription medication primarily used as a short-term aid in weight loss for individuals who are obese or have weight-related medical conditions. It functions as an appetite suppressant and belongs to a class of drugs known as sympathomimetic amines. Phentermine works by stimulating the release of certain neurotransmitters in the brain, such as norepinephrine, which help reduce hunger and increase feelings of fullness. This effect, combined with a doctor-approved exercise, behavior change, and reduced-calorie diet program, can help individuals achieve significant weight loss....

Potential Side Effects

Side effects score: 6; Phentermine is a prescription medication often used for weight loss, but it can have several side effects. Common side effects include increased heart rate, dry mouth, restlessness, insomnia, and constipation. Some people may also experience dizziness, headaches, or a change in taste. More serious side effects, though less common, can include elevated blood pressure, heart p

Health Categories

View efficacy ratings for Phentermine across multiple health categories.

Research & Evidence

Our efficacy ratings are based on scientific research and clinical studies.

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