Phentermine is prescribed short term to support weight management in adults with obesity or weight-related health conditions, as part of a clinician-supervised program that includes dietary changes, physical activity, and behavior modification. It works by suppressing appetite through stimulation of the central nervous system, helping reduce caloric intake during the initial phase of treatment.
Dosage is individualized by a licensed healthcare professional based on response and tolerability. Common regimens include 15 mg, 30 mg, or 37.5 mg once daily, usually taken in the morning to minimize insomnia. Some patients may be started on lower doses or advised to use divided dosing. Treatment duration is typically limited to a few weeks.
Possible side effects include increased heart rate, elevated blood pressure, dry mouth, restlessness, and sleep disturbance. Phentermine is not suitable for individuals with certain cardiovascular conditions, uncontrolled hypertension, hyperthyroidism, glaucoma, or a history of substance misuse. Always follow prescriber instructions and monitoring recommendations.
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