In short
Contrave combines naltrexone and bupropion and works on appetite and reward pathways in the brain. GLP-1 medications work on gut hormones and gastric.
By Alsen Walker · Updated September 20, 2026
Contrave combines naltrexone and bupropion and works on appetite and reward pathways in the brain. GLP-1 medications work on gut hormones and gastric emptying. The mechanisms are unrelated, the side effect profiles are unrelated, and Contrave carries contraindications that matter a great deal to a subset of people.
Contrave is not appropriate for everyone, and some of the reasons are serious. It is contraindicated with opioid use, including prescription painkillers and opioid dependence treatment, because naltrexone blocks opioids and can precipitate withdrawal. It is also contraindicated with uncontrolled high blood pressure, seizure disorders, and certain other medications, and bupropion carries warnings regarding mood and suicidal thinking.
Tell your prescriber every medication you take, including anything for pain. This is not a drug to obtain without a full medication review.
For how this fits alongside the other comparisons, and what actually decides the choice, see Comparing GLP-1 Medications: How to Actually Choose.
Different targets
Contrave acts centrally. Bupropion affects dopamine and noradrenaline; naltrexone blocks opioid receptors. Together they influence appetite and food-related reward, which is why it is sometimes considered where cravings rather than volume are the problem.
GLP-1 medications act largely on the gut-brain axis, slowing gastric emptying and reducing appetite signalling. The experience is more one of fullness and indifference to food.
Side effects compared
Contrave: nausea, constipation, headache, insomnia, dry mouth, dizziness, and raised blood pressure and heart rate. Mood changes need watching given the bupropion component.
GLP-1s: predominantly gastrointestinal, with the serious warnings discussed elsewhere on this site.
Both cause nausea, which is worth knowing if that is what stopped you before.
Where Contrave has a role
Cost and coverage, since it is generally less expensive than GLP-1 medications and may be covered where they are not.
Where cravings and food-related reward are the dominant problem rather than portion size.
Where a GLP-1 was not tolerated, or where injections are a genuine barrier.
Bupropion is also used for depression and smoking cessation, which occasionally makes a combined consideration relevant. That is a prescriber judgement, not a self-selection.
Where it is the wrong choice
Anyone taking opioids, for the reason in the warning above. This includes prescription pain medication and treatment for opioid dependence.
Anyone with a seizure history or conditions lowering the seizure threshold.
Uncontrolled hypertension.
Certain other psychiatric medications, which is why a full medication list matters.
Can they be combined
Combination approaches exist under specialist supervision and are not something to arrange independently. If you are considering it, ask your prescriber rather than adding one to the other.
The opioid contraindication is the item to check before anything else. If cost is what is driving the comparison, savings cards and patient assistance are worth exhausting first.
Frequently asked questions
Which produces more weight loss?
A clinical question for your situation rather than a general ranking.
Is Contrave cheaper?
Often, and coverage varies. Check your formulary for both.
Can I take it with painkillers?
Not with opioids. Tell your prescriber everything you take, including occasional pain medication.
Does it help with cravings specifically?
That is the rationale for its mechanism. Whether it helps you is individual.
Is it a stimulant?
Not in the phentermine sense, though bupropion can cause insomnia and restlessness.
Can I switch from a GLP-1?
Yes, with a prescriber decision and a full medication review first.
Sources and further reading
- National Institute of Diabetes and Digestive and Kidney Diseases (NIH). Prescription medications to treat overweight and obesity. www.niddk.nih.gov
- MedlinePlus (US National Library of Medicine). Semaglutide injection: drug information. medlineplus.gov
- MedlinePlus (US National Library of Medicine). Tirzepatide injection: drug information. medlineplus.gov
GLP1Hub content is for general information and is not medical advice. Prices and coverage rules change often, so confirm current details with the provider, your insurer and your prescriber. See our editorial standards and medical disclaimer.
