Phentermine is prescribed short term as part of a medically supervised weight-management program for adults with obesity or weight-related health conditions. It acts as an appetite suppressant by stimulating the central nervous system, helping reduce caloric intake alongside dietary changes, increased physical activity, and behavioral modifications.
Dosage is individualized by a licensed clinician. Common doses include 15 mg, 30 mg, or 37.5 mg once daily, usually taken in the morning to prevent insomnia. Some patients may start at a lower dose or use divided dosing. Treatment is typically limited to a few weeks.
Potential side effects include increased heart rate, elevated blood pressure, restlessness, dry mouth, and sleep disturbance. Phentermine is not suitable for individuals with cardiovascular disease, uncontrolled hypertension, hyperthyroidism, glaucoma, or a history of substance misuse. Always follow prescriber guidance and monitoring recommendations.
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