A daily oral medication used for short-term weight management, phentermine helps reduce appetite so it's easier to stick to a reduced-calorie plan. Prescribed online after a provider review of your health history.
Phentermine is an oral appetite-suppressant medication (a sympathomimetic) used for short-term weight management. It works on the brain to reduce hunger, making it easier to follow a reduced-calorie plan. It is taken daily for a limited period and is meant to be paired with diet and lifestyle changes.
Acts on the brain to curb hunger so a reduced-calorie plan is easier to keep.
Designed for short-term use while you build sustainable eating and activity habits.
A once-daily morning tablet — no injections — under provider supervision.
A licensed provider screens your heart health and history before prescribing.
Phentermine acts on neurotransmitters in the brain that influence hunger and satiety.
You feel less hungry, which makes it easier to eat less and stay within a calorie plan.
Used short-term alongside nutrition and activity changes to jump-start weight loss.
Phentermine may be a fit for adults who want a short-term appetite-suppressant tool to jump-start a reduced-calorie plan, and who do not have the heart or blood-pressure conditions that make it unsafe.
It is not appropriate for everyone. Because it can raise heart rate and blood pressure, a licensed provider screens your cardiovascular history before deciding whether it's right for you.
Start your visit →Answer a few questions online about your health, heart history, and goals. No appointment needed.
A licensed provider reviews your information, including heart health, and if appropriate writes a prescription.
If prescribed, your medication ships discreetly from a U.S. pharmacy where available.
Your provider selects the dose and how long you should use it.
Phentermine is not appropriate for people with heart disease, uncontrolled high blood pressure, a history of stroke, an overactive thyroid, glaucoma, a history of substance misuse, or during pregnancy or breastfeeding. It can raise heart rate and blood pressure. Tell your provider about your full medical history and every medication you take.
Seek immediate care for chest pain, severe headache, shortness of breath, or fainting. Do not combine with other stimulant weight-loss drugs.
This page was written and is periodically reviewed for medical accuracy in line with clinical guidance followed by the independent, licensed medical providers in the ForbiddenRx network. Last reviewed: July 2026.
This page is educational and is not medical advice.
Complete a quick online visit. A licensed provider reviews your health history and, if appropriate, your phentermine ships to your door.
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