What Is Phentermine?
Phentermine is an FDA-approved prescription medication used to suppress appetite and enhance energy. It’s one of the most widely prescribed short-term treatments for obesity and is often used to jumpstart weight loss in medically supervised programs.
Phentermine works by stimulating the central nervous system to increase norepinephrine and dopamine activity—leading to reduced hunger, increased alertness, and improved focus. It is generally prescribed in low-to-moderate doses for a short duration (typically 8–12 weeks).
Your provider may prescribe phentermine alone or combine it with other medications such as naltrexone, metformin, or GLP-1s for enhanced, longer-term results.
What’s Included With Your Plan
- Provider Evaluation & Prescription
- Access to Phentermine (from $199/month)
- Free AI-powered nutrition & fitness app
- Ongoing medical guidance and dose adjustment
* Final price to patient will depend on medication dosage and membership plan purchase.
Who can take Phentermine?
✅ Adults with a BMI ≥30, or ≥27 with conditions like PCOS, insulin resistance, or prediabetes
✅ Those who don’t qualify for—or can’t afford—brand-name GLP-1s
✅ Patients seeking medically managed weight loss with ongoing support
✅ Anyone committed to sustainable, health-focused fat loss
How to get started.
Online questionnaire
Complete a secure online consultation
Medical evaluation
Your provider evaluates your goals, history & labs
Personalized plan
If appropriate, you’ll receive a Saxenda / Victoza prescription
Start your Medication
All medications come with full instructions
Ongoing support
Track your results and get support inside our AI-powered app
A few reviews from real patients
Jenna R., lost 42 lbs in 6 months
I’ve tried everything. This was the first program that worked—and the app made it simple.
David M., lost 31 lbs and reversed prediabetes
Being able to switch from brand-name to alternative saved me hundreds.
Ashley P., 38, Austin TX
I was nervous to try weight loss meds, but the provider explained everything so clearly. I’ve lost 27 lbs and feel amazing!
Marcus L., 44, Dallas CA
The app keeps me accountable and the meds actually work. I’ve dropped two sizes and finally have energy again.
Patients received compensation for sharing their experience. Results are not independently verified and may vary. Weight loss results depend on individual factors, including adherence to prescribed medication, a reduced-calorie diet, and regular physical activity.
Results You Can Expect
Patients who take phentermine as part of a medical weight loss program typically experience:
- Rapid appetite suppression
- Increased energy and physical activity
- Fewer cravings and snacking episodes
- Motivation boost in the early phase of weight loss
- Weight loss of 5–10% over 2–3 months
📊 Studies show that phentermine can result in an average weight loss of 3–9 kg (~6–20 lbs) in the first 12 weeks. Results vary based on lifestyle, dosage, and whether it’s used alone or in combination.
Pricing & Guarantee
💊 Phentermine
Starting at $199/month — includes prescription, shipping, and refill coordination.
💡 Pair it with our $195/month membership for full medical support, progress tracking, and coaching.
✅ Our Guarantee: Follow your plan or we refund your monthly membership fee. (Medication cost is non-refundable.)
Get Started Today
Getting access to Phentermine is simple, safe, and fast.
👉 Take the 60-second quiz
👉 Match with a provider
👉 Get personalized treatment shipped to your door
Frequently Asked Question
Is phentermine FDA-approved for weight loss?
Yes. Phentermine is FDA-approved as a short-term appetite suppressant to assist with weight loss in adults with a BMI ≥30 or ≥27 with a related condition.
How does it work?
Phentermine stimulates the release of norepinephrine and dopamine, which decreases hunger signals in the brain and increases alertness and motivation.
Is phentermine a stimulant?
Yes, phentermine is a mild sympathomimetic stimulant, similar to amphetamines. It is classified as a Schedule IV controlled substance and must be prescribed and monitored by a licensed provider.
Who is phentermine best for?
Phentermine is ideal for patients who:
- Need a short-term jumpstart to their weight loss
- Struggle with significant hunger or binge eating
- Need an energy boost to increase physical activity
- Are supervised in a structured medical program
How fast does it work?
Many patients notice a significant decrease in appetite within the first few days. Weight loss typically starts in the first week and continues steadily for several weeks.
How long can I take phentermine?
It is generally prescribed for up to 12 weeks at a time. In some cases, your provider may recommend a second cycle or use it intermittently alongside other medications.
What are the side effects?
Common side effects may include:
- Dry mouth
- Insomnia
- Increased heart rate
- Anxiety or restlessness
- Constipation
- These usually resolve as your body adjusts. Always report side effects to your provider.
Can phentermine be combined with other weight loss meds?
Yes. Many providers combine phentermine with topiramate, naltrexone, or GLP-1 medications to target multiple appetite and metabolic pathways. Your provider will customize the safest plan for your goals.
Important Safety and Regulatory Information
Phentermine is an FDA-approved prescription medication indicated for the short-term treatment of obesity. It is typically prescribed for patients with a BMI ≥30, or ≥27 with weight-related health risks, such as hypertension, high cholesterol, or type 2 diabetes.
Phentermine is a Schedule IV controlled substance and may carry a risk of psychological dependence or misuse if not properly managed. It is not recommended for patients with a history of heart disease, uncontrolled hypertension, hyperthyroidism, glaucoma, or substance use disorder.
Phentermine should not be used in the following cases:
- History of cardiovascular disease
- Moderate to severe hypertension
- Pregnancy or breastfeeding
- Recent use of MAO inhibitors
- Anxiety disorders or uncontrolled mental health conditions
Common side effects include dry mouth, insomnia, jitteriness, constipation, or elevated heart rate. These are usually dose-dependent and reversible with medication adjustment or discontinuation.
Phentermine is not meant for long-term use as a standalone therapy but can be highly effective when integrated into a structured weight loss program that includes nutrition, movement, and medical supervision.
Always follow your provider’s instructions. Never share this medication or adjust your dose without medical guidance. Review the full Medication Guide for more details.