Contrave vs Phentermine: Which Weight-Loss Pill Fits You?
Contrave and phentermine are oral weight-loss medications with very different mechanisms. Contrave may help appetite and reward-driven eating, while phentermine is a traditional stimulant-like appetite suppressant.

Comparison at a glance
| Feature | Contrave | Phentermine |
|---|---|---|
| Ingredients | Naltrexone and bupropion | Phentermine |
| Role | Chronic weight management | Short-term labeled use |
| May fit | Eligible patient with craving or reward-eating concerns | Eligible patient needing appetite suppression at lower cost |
| Major cautions | Opioids, seizure risk, uncontrolled BP, eating disorders, mood | Cardiovascular disease, BP, anxiety, insomnia, misuse |
| Controlled substance | No | Yes |
Why opioid use matters with Contrave
Naltrexone blocks opioid receptors. Contrave is not appropriate with ongoing opioid use and can complicate pain treatment. The prescriber must review prescriptions, cough medicines, antidiarrheals and planned procedures.
Why cardiovascular and sleep screening matter with phentermine
Phentermine can increase heart rate, worsen insomnia or aggravate anxiety. W8MD reviews blood pressure, pulse, cardiovascular history, other stimulants and untreated sleep apnea before prescribing.
What to expect from a W8MD medication evaluation
The first step is not choosing a brand from an advertisement. W8MD reviews weight history, previous diets and prescriptions, medication allergies, blood pressure, pulse, sleep symptoms, glucose status, relevant laboratory results, cardiovascular history, gastrointestinal symptoms, kidney and liver concerns, pregnancy plans and current medicines. This helps identify contraindications and realistic alternatives.
The treatment plan can include a lower-cost traditional prescription, an FDA-approved incretin medicine, structured nutrition, meal replacements, a medically supervised very-low-calorie diet for selected patients, home sleep-apnea testing or a combination of services. Follow-up assesses appetite response, adverse effects, hydration, protein intake, bowel symptoms, blood pressure, muscle preservation and progress toward health-centered goals. A dose is not increased simply because a calendar date arrives.
Affordable W8MD treatment pathways
Semaglutide
From $29.99/week when insurance is accepted for qualifying visits. Self-pay pathways start from $59.99/week.
Tirzepatide
From $45/week when insurance is accepted for qualifying visits. Self-pay pathways start from $69.99/week.
Traditional prescriptions
Phentermine, topiramate, Qsymia, Contrave, diethylpropion, phendimetrazine and orlistat may be considered when clinically appropriate.
Pricing notice: Starting prices are not guaranteed for every patient or dose. Visit, medication, laboratory, supply, shipping, copay, deductible and dose costs may be separate. Insurance coverage of a visit does not guarantee pharmacy coverage.
Medication safety and supervision
Prescription obesity treatment requires an individualized evaluation. Common considerations include pregnancy, cardiovascular disease, blood pressure, kidney and liver health, gastrointestinal disease, gallbladder and pancreatic history, glaucoma, mental health, diabetes medicines, controlled-substance risk and drug interactions. Product-specific FDA labeling controls.
Frequently asked questions
Which is a controlled substance?
Phentermine is controlled; Contrave is not.
Which can be used with opioids?
Contrave generally cannot be used with ongoing opioid treatment.
Which is cheaper?
Generic phentermine is often less expensive, but appropriateness comes first.
Related Philadelphia and W8MD resources
Philadelphia services
WikiMD encyclopedia
How W8MD Philadelphia can help
W8MD physicians have more than 20 years of clinical experience and compare medical conditions, contraindications, previous attempts, appetite patterns, sleep, cultural food preferences, insurance coverage, patient preferences and long-term cost. Care can include medication, structured nutrition, a medically supervised VLCD for selected patients, sleep-apnea evaluation, muscle-preservation planning and maintenance.
1718 Welsh Road, 2nd Floor, Suite C, Philadelphia, PA 19115
Phone: 215-676-2334
Serving Northeast Philadelphia, Bucks County, Montgomery County, Delaware County, nearby Pennsylvania communities and South Jersey, subject to clinical and licensure requirements.
Contact W8MD Philadelphia
Use this form for nonurgent appointment and service questions.
