Phentermine is prescribed short term as part of a medically supervised weight-management program for adults with obesity or weight-related conditions. It works by suppressing appetite through stimulation of the central nervous system, supporting reduced caloric intake along with diet, exercise, and behavioral changes.
Dosage is individualized by a licensed clinician. Common dosing includes 15 mg, 30 mg, or 37.5 mg once daily, usually taken in the morning to prevent insomnia. Some patients may be advised to 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 disturbances. Phentermine is not appropriate 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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