- Alcohol significantly increases seizure risk with Contrave’s bupropion component — heavy drinking is a contraindication
- Contrave’s naltrexone component can reduce the pleasurable effects of alcohol, which may be a benefit for some patients but requires medical guidance
- Moderate social drinking may be possible for some patients, but must be discussed with your prescriber first
- Patients with alcohol use disorder or heavy drinking patterns should consider alternative weight-loss medications
If you have been prescribed Contrave or are considering it for weight loss, one of the most important questions to discuss with your provider is your relationship with alcohol. Contrave is a combination of two active ingredients — naltrexone and bupropion — and both interact with alcohol through different mechanisms. This is not a minor drug interaction. Understanding the risks is essential for safe, effective treatment.
Why this interaction matters
Contrave contains naltrexone 8 mg and bupropion 90 mg extended-release in each tablet. At the full maintenance dose, patients take two tablets twice daily, for a total daily dose of 32 mg naltrexone and 360 mg bupropion. Both components have clinically significant interactions with alcohol — but through entirely different pathways.
This is not a theoretical concern or a minor warning buried in fine print. Bupropion combined with alcohol carries FDA black box-level seizure risk. Patients must be completely honest about their alcohol use before starting Contrave, because this information directly affects whether the medication is safe for them.
During every Contrave evaluation, PEAK providers ask detailed questions about alcohol consumption patterns. This is not a judgment — it is a safety requirement. The answers directly determine whether Contrave is the right medication for you or whether an alternative would be safer.
Bupropion and alcohol
Bupropion, one of Contrave’s two active ingredients, lowers the seizure threshold. This is a well-documented effect that is the basis for several of bupropion’s prescribing precautions. Alcohol — especially heavy or chronic use — also lowers the seizure threshold. When combined, the effect is compounded: seizure risk increases significantly beyond what either substance would cause alone.
The risk is highest in specific situations:
- Abrupt alcohol cessation. Patients who drink heavily and suddenly stop are at elevated seizure risk. The FDA prescribing information explicitly states that Contrave is contraindicated in patients undergoing abrupt discontinuation of alcohol.
- Binge drinking. Episodes of heavy drinking (four or more drinks for women, five or more for men in a single occasion) significantly increase seizure risk in patients taking bupropion.
- Chronic heavy use. Long-term heavy drinking alters brain chemistry in ways that compound bupropion’s seizure threshold-lowering effect.
Even moderate drinking can increase central nervous system side effects when combined with bupropion, including dizziness, impaired judgment, and drowsiness. These effects may be more pronounced than patients expect, particularly early in treatment.
Risk also increases with dose. Contrave follows a four-week titration schedule, gradually increasing from one tablet daily to the full dose of two tablets twice daily. This is one reason why a thorough alcohol history matters before starting — the interaction risk grows as the dose increases.
This is not a minor interaction. Bupropion plus alcohol equals significantly elevated seizure risk — and seizures can be life-threatening.
Naltrexone and alcohol
Naltrexone is primarily known as an opioid antagonist, but it also blocks some of the brain’s alcohol reward pathways. At higher doses (50 mg daily), naltrexone is FDA-approved for the treatment of alcohol use disorder — it reduces cravings and diminishes the pleasurable effects of drinking.
At Contrave’s dose (8 mg per tablet, 32 mg daily at maintenance), the effect on alcohol is less pronounced but still present. Some patients notice:
- Reduced desire to drink alcohol
- Less pleasurable effect from alcoholic beverages
- Finding it easier to stop at one drink rather than continuing
For patients who are trying to reduce their alcohol intake, this can be a welcome side effect. Some clinicians view this as an added benefit of Contrave for patients who drink socially and want to cut back.
While naltrexone’s effect on alcohol cravings can be helpful, it does not make drinking safe for Contrave patients. The bupropion component’s seizure risk remains the primary concern regardless of how naltrexone affects your desire to drink. Reduced cravings do not equal reduced risk.
Risk assessment
Not every patient faces the same level of risk. PEAK providers evaluate each patient individually, but general risk categories help frame the conversation:
| Risk Level | Profile | Recommendation |
|---|---|---|
| High risk | History of alcohol use disorder, current heavy drinking (>14 drinks/week men, >7 women), binge drinking pattern, history of seizures, concurrent benzodiazepine use, recent alcohol detox | Contrave should NOT be prescribed |
| Moderate risk | Regular moderate drinking (7–14 drinks/week men, 4–7 women), social drinking 2–3 times per week, family history of seizures | Careful evaluation needed; may require alcohol reduction before starting |
| Lower risk | Rare or occasional drinking (1–2 drinks per week or less), willingness to abstain or significantly reduce during treatment | May proceed with counseling and monitoring |
PEAK evaluates each patient individually. There is no one-size-fits-all answer — your provider will consider your complete medical history, current medications, seizure risk factors, and drinking patterns before making a recommendation.
Contrave also carries a black box warning for suicidal thoughts and behavior, primarily associated with the bupropion component. Patients should be monitored for changes in mood or behavior during treatment.
Safe guidelines
If your provider has cleared you for occasional alcohol use while taking Contrave, the following guidelines can help minimize risk:
- Limit to one drink per occasion. One standard drink means 12 oz beer, 5 oz wine, or 1.5 oz spirits. This is not a suggestion — it is a safety boundary.
- Avoid binge drinking entirely. There is no safe level of binge drinking while taking Contrave. Even a single episode of heavy drinking can trigger a seizure.
- Stay hydrated and eat before drinking. Alcohol on an empty stomach is absorbed faster and has more pronounced effects, especially when combined with bupropion.
- Never skip Contrave doses to “allow” drinking. Inconsistent dosing creates its own risks, including increased side effects when restarting. Skipping doses does not eliminate the interaction risk.
- Monitor for warning signs. Watch for unusual dizziness, confusion, or nausea that is more severe than expected. These can be amplified by the combination of Contrave and alcohol.
- Contact your provider if drinking increases. If you find yourself drinking more than planned, or more frequently, tell your PEAK provider. Your treatment plan may need to be adjusted.
- Plan ahead for events. If you know you will be in a situation with alcohol, discuss timing and expectations with your provider in advance.
Alternative medications
For patients whose alcohol use makes Contrave unsafe or impractical, several alternative weight-loss medications have less significant alcohol interactions:
Phentermine
Phentermine does not carry the same seizure risk with alcohol that bupropion does. However, alcohol may increase phentermine side effects such as dizziness and elevated heart rate. Phentermine is a short-term option (typically 12 weeks) and is very affordable with or without insurance. Compare non-GLP-1 options in our Contrave vs. phentermine comparison.
GLP-1 medications (Wegovy, Zepbound)
GLP-1 receptor agonists do not have a direct CNS-mediated alcohol interaction. Alcohol can worsen the gastrointestinal side effects that are common with GLP-1s (nausea, in particular), so moderation is still advised. Emerging research suggests that GLP-1 medications may actually reduce alcohol cravings in some patients — an area of active study.
Orlistat
Orlistat works in the gut, not the brain, so there is no CNS-mediated alcohol interaction. Its primary side effects are gastrointestinal and may be worsened by the combination of fatty foods and alcohol. For patients who need a weight-loss medication with minimal alcohol concerns, orlistat is worth discussing.
PEAK will recommend the safest medication based on your complete health picture, including your alcohol use patterns, medical history, and weight loss goals.
Frequently asked questions
Can I have one glass of wine on Contrave?
For some patients with no seizure risk factors and low overall alcohol consumption, occasional light drinking may be acceptable. However, this must be discussed with your prescriber first — it is not a blanket yes. Your individual risk factors, medical history, and current Contrave dose all factor into this decision.
Will Contrave make me stop wanting to drink?
The naltrexone component may reduce alcohol cravings or the rewarding effects of drinking. Some patients notice decreased interest in alcohol, while others do not experience this effect. The response varies from person to person, and Contrave’s naltrexone dose (32 mg/day) is lower than the dose used specifically for alcohol use disorder (50 mg/day).
What happens if I drink heavily on Contrave?
Heavy drinking with Contrave significantly increases seizure risk. If you have been drinking heavily, contact your provider before your next dose. Importantly, do not abruptly stop drinking either — alcohol withdrawal itself can cause seizures, and the combination with bupropion compounds this risk. Your provider can guide you on how to proceed safely.
Should I stop Contrave before a vacation where I’ll drink?
Do not stop or adjust Contrave without medical guidance. Abrupt discontinuation has its own risks, including mood changes and the potential for withdrawal-like symptoms from bupropion. Talk to your PEAK provider before any planned changes to your medication schedule — there are safer strategies than simply stopping the medication.
Is there a weight-loss medication with no alcohol restrictions?
No weight-loss medication is completely free of alcohol considerations, but GLP-1 medications (Wegovy, Zepbound) and orlistat have less significant alcohol interactions than Contrave. If alcohol is an important part of your social life and you are unwilling or unable to significantly reduce your intake, these alternatives may be a better fit. Your PEAK provider can help you weigh the options.
Clinical references
- Contrave (naltrexone HCl/bupropion HCl) Extended-Release Tablets Prescribing Information. Currax Pharmaceuticals LLC. Section 5.3: Seizures; Section 5.4: Patients receiving alcohol.
- Dunner DL, Zisook S, Billow AA, et al. A prospective safety surveillance study for bupropion sustained-release in the treatment of depression. J Clin Psychiatry. 1998;59(7):366–373.
- Anton RF, O’Malley SS, Ciraulo DA, et al. Combined pharmacotherapies and behavioral interventions for alcohol dependence: the COMBINE study. JAMA. 2006;295(17):2003–2017.
- FDA Drug Safety Communication: FDA revises the label for bupropion to more accurately reflect seizure risk. U.S. Food and Drug Administration.
