Phentermine Prescription Weight-Loss Care
Phentermine is a sympathomimetic prescription appetite suppressant approved for short-term use as part of a broader weight-management plan in appropriate patients.
Why medical screening matters
Before considering phentermine, W8MD reviews cardiovascular history, blood pressure, medications, substance-use history, glaucoma, thyroid disease, agitation, pregnancy and prior response to stimulants. Follow-up can include pulse, blood pressure, sleep, mood, appetite and adverse effects.
Self-pay medical weight-loss arrangements may include a visit-only prescription plan or, when appropriate and available, an office-dispensed medication plan. Call for the current complete price.
How W8MD chooses a medication
Medical fit
Conditions, medications, contraindications, interactions, prior response and monitoring needs.
Patient fit
Injection or tablet preference, eating pattern, schedule, side-effect priorities and treatment goals.
Practical fit
Insurance formulary, authorization, availability, pharmacy access and sustainable total cost.
Safety and follow-up
Phentermine can cause insomnia, increased pulse or blood pressure, dry mouth, constipation, anxiety and other stimulant effects. It is contraindicated in several conditions and should not be combined with monoamine oxidase inhibitors within the prohibited interval. It is a controlled substance and should be used only as prescribed.
Follow-up evaluates response, tolerance, nutrition, hydration, bowel symptoms, blood pressure or laboratory information when relevant, activity, lean-mass goals and maintenance planning. Dose escalation is not automatic.
Related resources: Medical weight loss · Medication guide · GLP-1 comparison · Affordability · Costs and insurance · Anti-obesity medication encyclopedia
For current product labeling and safety information, consult Drugs@FDA.
Ask W8MD which option fits you
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Medical and pricing notice: General education only, not medical advice. Evaluation is required and a prescription is not guaranteed. Eligibility, product, dose, pharmacy, availability, insurance coverage, total price and results vary. Seek urgent care for severe symptoms and call 911 for an emergency.
Content reviewed for general accuracy by W8MD clinical leadership. Last reviewed September 2026.