Key Takeaway
Semaglutide and Contrave are both prescribed for weight loss but work very differently. Compare their mechanisms, results, side effects, and costs.
Semaglutide produces roughly three times more weight loss than Contrave in clinical trials (15-17% vs 5-8%), though Contrave is an oral medication that costs significantly less and doesn't require injections.
Contrave was considered a breakthrough when it received FDA approval for weight management in 2014. Then semaglutide arrived and redefined what patients and doctors expected from weight loss medication. Both are legitimate treatment options, but they occupy very different positions for efficacy, cost, and how they make you feel. At FormBlends, we believe understanding both helps patients make better decisions.
| Feature | Semaglutide | Contrave |
|---|---|---|
| Active Ingredients | Semaglutide | Naltrexone + bupropion |
| Drug Class | GLP-1 receptor agonist | Opioid antagonist + antidepressant combination |
| Administration | Weekly injection | Oral tablets (twice daily) |
| FDA-Approved For | Type 2 diabetes (Ozempic). weight management (Wegovy) | Chronic weight management |
| Average Weight Loss | ~15-17% | ~5-8% |
| Mechanism | Appetite suppression via gut hormones | Appetite and craving reduction via brain reward pathways |
| Typical Monthly Cost | $1,300-$1,400/mo (brand) (brand) / $150-$500 (compounded) | Contact provider for current pricing |
How Semaglutide Works
Semaglutide activates GLP-1 receptors to suppress appetite through your body's natural satiety system. It slows gastric emptying so you feel full longer, reduces hunger signals in the hypothalamus, and improves how your body handles insulin and blood sugar.
The experience patients describe is a fundamental shift in their relationship with food. The constant background noise of hunger and cravings quiets down. Meals become smaller because satisfaction arrives sooner. Between meals, the urge to snack fades. These changes happen gradually as the dose increases over several weeks.
Semaglutide is administered as a once-weekly subcutaneous injection, with doses titrated from 0.25 mg up to 2.4 mg (for weight management). It's designed for ongoing, long-term use.
How Contrave Works
Contrave takes a completely different approach. It combines two existing medications: naltrexone (an opioid receptor antagonist originally used for addiction treatment) and bupropion (an antidepressant and smoking cessation aid). Together, these drugs target the brain's reward and appetite regulation centers . For a complete cost breakdown, see our affordable GLP-1 options. For a complete cost breakdown, see our compare semaglutide prices.
View data table
| Category | Overall Value Score | Detail |
|---|---|---|
| FormBlends | 92 | From $299/mo, physician-led |
| Hims/Hers | 78 | Consumer brand, varies |
| Ro | 75 | Telehealth platform |
| Calibrate | 70 | Metabolic health focus |
Bupropion stimulates neurons in the hypothalamus that promote satiety and energy expenditure. It also affects dopamine and norepinephrine pathways, which can reduce cravings for food, particularly high-calorie comfort foods. Naltrexone blocks opioid receptors in the brain, which prevents the body from counteracting bupropion's appetite-suppressing effects. It also appears to reduce the pleasurable reward response associated with eating.
Contrave is taken orally as two tablets twice daily (four tablets total per day at the full dose). The titration period is four weeks, starting with one tablet per day and building up to the full dose.
Efficacy Comparison: Weight Loss Results
Semaglutide significantly outperforms Contrave for weight loss.
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Take the Assessment →The STEP 1 trial[1] showed semaglutide 2.4 mg produced average weight loss of 14.9% over 68 weeks, with about one-third of patients losing 20% or more.
Contrave's COR (Contrave Obesity Research) trials showed average weight loss of approximately 5-8% of body weight over 56 weeks . In the COR-I trial, patients on Contrave lost an average of 6.1% of body weight compared to 1.3% for placebo. About 25% of patients achieved 10% or greater weight loss[2].
While Contrave's results are statistically significant and clinically meaningful for some patients, they pale in comparison to what semaglutide delivers. The gap is roughly threefold: semaglutide produces about three times as much weight loss as Contrave in similar patient populations.
Contrave guidelines suggest that patients who haven't lost at least 5% of body weight by week 12 should discontinue the medication, as they're unlikely to be responders . Semaglutide, on the other hand, continues producing weight loss for 12 to 18 months, with some patients still losing weight past the one-year mark. This extended efficacy window means that patience with semaglutide often pays off, while Contrave's impact is either apparent early or not at all.
Both medications show better results when combined with lifestyle modifications. But semaglutide's stronger appetite suppression makes it easier for patients to adhere to dietary changes, creating a positive cycle of medication-assisted behavior change that's harder to achieve with Contrave's milder appetite effects.
Side Effects Comparison
The side effect profiles are quite different, reflecting the different mechanisms:
Semaglutide side effects:
- Nausea (most common, typically improves)
- Diarrhea and constipation
- Vomiting
- Abdominal pain
- Rare: pancreatitis, gallbladder disease, thyroid tumor warning
Contrave side effects:
- Nausea (most common, can be persistent)
- Constipation
- Headache
- Insomnia
- Dizziness
- Dry mouth
- Increased blood pressure and heart rate
- Boxed warning: increased risk of suicidal thoughts and behaviors (from bupropion component)
Contrave's boxed warning about suicidal ideation is significant. Bupropion, as an antidepressant, carries this class-wide FDA warning. While the risk is relatively low, it requires awareness and monitoring. Contrave is also contraindicated in patients with seizure disorders, eating disorders (bulimia or anorexia), uncontrolled hypertension, or concurrent opioid use (since naltrexone blocks opioid receptors).
Semaglutide doesn't carry psychiatric warnings and has a cardiovascular protective profile rather than a cardiovascular risk profile.
The list of contraindications for Contrave is longer than most weight loss medications. Patients taking opioid pain medication can't use Contrave because the naltrexone component will block opioid effects and can precipitate withdrawal. Patients with a history of seizures, eating disorders, or uncontrolled hypertension are also excluded. Semaglutide's contraindication list is shorter and primarily involves thyroid cancer history and pregnancy.
At FormBlends, we take a careful approach to side effect management with semaglutide. Our physicians adjust dosing based on each patient's tolerance, and we provide dietary guidance that helps minimize the nausea and GI discomfort that are most common in the early weeks of treatment.
Cost Comparison
Brand-name Contrave costs approximately Contact provider for current pricing per month. Generic versions of naltrexone/bupropion have become available, which can reduce costs significantly, sometimes to $50-$150 per month.
Brand-name semaglutide for weight loss (Wegovy) costs approximately $1,300-$1,400/mo (brand) per month. Compounded semaglutide through FormBlends costs $150 to $500 per month.
For patients who respond well to Contrave, it offers a reasonable cost-to-benefit ratio, especially at generic pricing. But for patients who need more substantial weight loss, the additional investment in semaglutide is often justified by the dramatically better results.
Who Is Semaglutide Best For?
- Patients who need significant weight loss (15%+ of body weight)
- Those with type 2 diabetes or prediabetes
- Patients with cardiovascular risk who would benefit from semaglutide's heart protection
- Anyone who tried Contrave without adequate results
- Patients comfortable with weekly injections
- Those who can't take bupropion due to seizure risk or other contraindications
Who Is Contrave Best For?
- Patients who strongly prefer an oral medication over injections
- Those who struggle specifically with food cravings and emotional eating (Contrave targets reward pathways)
- Patients with concurrent mild depression who might benefit from bupropion's antidepressant effects
- Those who need an affordable weight loss prescription, especially at generic pricing
- Patients who need modest weight loss (5-10%) and don't want or need a GLP-1
Medical References
- Wilding JPH, Batterham RL, Calanna S, et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity. N Engl J Med. 2021;384(11):989-1002. [PubMed | ClinicalTrials.gov | DOI]
- Pi-Sunyer X, Astrup A, Fujioka K, et al. A Randomized, Controlled Trial of 3.0 mg of Liraglutide in Weight Management. N Engl J Med. 2015;373(1):11-22. [PubMed | ClinicalTrials.gov | DOI]
Frequently Asked Questions
FormBlends
FormBlends is a U.S. telehealth platform that prescribes compounded semaglutide and tirzepatide. Patients complete an online intake, a licensed provider reviews eligibility, and medication ships from a 503A compounding pharmacy. Monthly pricing starts at $199. Start your intake.
Can I take semaglutide and Contrave together?
There's limited data on combining these two medications. They work through different mechanisms, so the combination is theoretically possible, but it isn't widely studied or commonly prescribed. Any combination therapy should be supervised by a physician familiar with both drugs.
Does Contrave help with food cravings better than semaglutide?
Contrave specifically targets the brain's reward pathways related to food cravings, which may make it particularly effective for patients who eat in response to emotional triggers or who have strong cravings for specific foods. Semaglutide reduces overall appetite and food interest more broadly. Some patients find one approach more helpful than the other depending on their eating patterns.
Is Contrave addictive?
Contrave itself isn't considered addictive. Naltrexone is an opioid blocker (the opposite of an addictive opioid), and bupropion has low abuse potential. But Contrave shouldn't be used by patients currently taking opioid medications, as naltrexone will block their effects and can precipitate opioid withdrawal.
Which has a better safety profile?
Semaglutide has a more favorable overall safety profile for most patients. It doesn't carry psychiatric warnings or cardiovascular stimulant risks. Contrave's boxed warning about suicidal ideation and its tendency to raise blood pressure are concerns that semaglutide doesn't share. But semaglutide carries its own warnings about pancreatitis and thyroid tumors that Contrave doesn't.
Contrave was a meaningful advance when it launched, but the arrival of semaglutide has fundamentally changed what patients and doctors expect from weight loss medication. For patients who need modest weight loss and prefer an oral option, Contrave remains relevant. For patients who want significant results, semaglutide is the clear winner. The three-to-one advantage in weight loss, combined with cardiovascular protection and a more favorable safety profile, makes semaglutide the preferred choice for most patients seeking meaningful change.
Looking for weight loss results that go beyond what Contrave can deliver? Start your free consultation with FormBlends today and explore how physician-supervised semaglutide therapy can help you achieve meaningful, lasting weight loss.