Phentermine: How It Works, What It's Studied For & Safety
Phentermine is a sympathomimetic appetite suppressant FDA-approved for short-term management of exogenous obesity, used as a non-GLP-1 weight-management option. Clinicians consider it for short-term management of exogenous obesity (FDA-approved). Branded products are FDA-approved under labeled indications; compounded variants are dispensed by Wells Pharmacy Network only after a licensed clinician evaluates intake, history, and labs.
Also known as: Adipex-P, Lomaira
How does Phentermine work?
Phentermine is a phenethylamine that increases central norepinephrine release, suppressing appetite. It is structurally related to amphetamine but with a different abuse-potential profile (Schedule IV vs II).
What is Phentermine studied for?
- Short-term management of exogenous obesity (FDA-approved)
- Combination Qsymia (phentermine/topiramate) for chronic weight management (FDA-approved)
How is Phentermine taken?
FDA-approved as oral capsules and tablets (15 mg, 30 mg, 37.5 mg, and Lomaira 8-mg). Schedule IV controlled substance.
Is Phentermine FDA-approved? Is it safe?
FDA-approved as a finished drug product when prescribed under its labeled indications. Compounded variants on this site are separate from the branded product and are dispensed only when a clinician determines a compounded preparation is appropriate. Hypertension, tachycardia, and insomnia are common. Schedule IV. Cardiovascular history must be reviewed before starting. Compounded prescription-only preparations are dispensed by Wells Pharmacy Network. Eligibility is decided by a licensed clinician based on intake and labs, not by checkout. Compounded products on this site are not FDA-approved and are not generic equivalents of any branded medication.
In the Regen Therapy catalog
This compound does not currently appear in an active Regen Therapy protocol. Browse the full catalog for adjacent options.
What does the research say about Phentermine?
Decades of FDA-approved use. Modern guidelines often pair it with lifestyle and other agents.
Citations & further reading
Considering Phentermine as part of a protocol?
Browse Regen Therapy's catalog or start a clinician evaluation. Every prescription is reviewed by a licensed clinician and dispensed by Wells Pharmacy Network.
Browse the catalog →