If you’re seeking medication for alcohol use disorder, understanding the differences between Antabuse (disulfiram) and naltrexone can help you make an informed decision about treatment. Both are FDA-approved medications that support recovery from alcohol use disorder, but they work in fundamentally different ways and suit different people.
At Porch Light Health, we offer both medications as part of comprehensive addiction treatment across Colorado and New Mexico. This guide will help you understand how each medication works, their benefits and drawbacks, and which might be right for your recovery journey.
The most important difference between Antabuse and naltrexone lies in their mechanism of action—how they help you stop drinking.
Antabuse creates an unpleasant physical reaction if you drink alcohol. It works by blocking the enzyme aldehyde dehydrogenase, which your body uses to break down alcohol. When you drink while taking Antabuse, toxic acetaldehyde builds up in your system, causing:
This “disulfiram reaction” typically begins 10-30 minutes after drinking and can last several hours. The severity depends on how much alcohol you consume and how much Antabuse is in your system. Even small amounts of alcohol—in mouthwash, cough syrup, or cooking—can trigger reactions.
The psychological effect: Knowing you’ll become severely ill if you drink creates a powerful deterrent. Antabuse essentially removes the option of impulsive drinking.
Naltrexone blocks opioid receptors in your brain that are involved in alcohol’s rewarding effects. When you take naltrexone:
The psychological effect: Drinking becomes less appealing because it’s no longer as rewarding. Many people find they can have one drink and stop, or that they simply lose interest in drinking altogether.
Unlike Antabuse, naltrexone doesn’t make you sick if you drink—it just makes drinking less satisfying. This fundamental difference shapes how each medication is used in treatment.
Both medications are effective for treating alcohol use disorder, but research shows some important differences.
Studies show Antabuse is highly effective when taken as prescribed. The challenge is adherence—people must take it consistently for it to work. Research published in the Journal of the American Medical Association (JAMA) shows:
The key factor: motivation and accountability. Antabuse works exceptionally well for people who have someone ensuring they take it daily and who are committed to abstinence.
According to the Substance Abuse and Mental Health Services Administration (SAMHSA), naltrexone reduces:
The National Institute on Alcohol Abuse and Alcoholism (NIAAA) recognizes naltrexone as a first-line treatment for alcohol use disorder. Studies show naltrexone works well for:
The Sinclair Method: Some people use naltrexone specifically before drinking (rather than daily) to reduce alcohol’s rewarding effects over time. This approach, called The Sinclair Method, has shown promise in research.
Research suggests:
The “best” medication depends on your goals, lifestyle, support system, and personal preference. Many people try one medication and switch to another if it doesn’t work well for them.
Both medications can cause side effects, though they differ significantly.
When not drinking alcohol:
When drinking alcohol (disulfiram reaction):
Common side effects (usually mild and temporary):
Less common side effects:
Important note: Unlike Antabuse, naltrexone doesn’t make you sick if you drink alcohol. The side effects are unrelated to alcohol consumption.
Most naltrexone side effects improve after the first few weeks. Taking it with food can reduce nausea, and knowing what to avoid on naltrexone helps prevent more serious interactions.
Strong deterrent effect: Knowing you’ll become severely ill creates powerful motivation not to drink
Clear accountability: Easy to verify compliance through observation or supervised dosing
No cravings needed: Works even if you still want to drink—the consequences prevent acting on urges
Long-lasting effect: Stays in your system for up to two weeks after stopping, maintaining protection
Lower cost: Generic disulfiram is typically inexpensive
Requires absolute abstinence: You cannot drink at all, even small amounts in food or products
Dangerous if you drink: The disulfiram reaction can be severe, even life-threatening
Daily compliance crucial: Missing doses eliminates protection within days
Limited flexibility: Doesn’t support moderation or reduced drinking goals
Requires vigilance: Must avoid alcohol in unexpected sources (cough syrup, vinegar, fermented foods)
Can be skipped: If unsupervised, people can simply stop taking it before drinking
Reduces cravings: Addresses the underlying desire to drink, not just creates consequences
Safe if you drink: Doesn’t cause dangerous reactions—just reduces alcohol’s effects
Supports multiple goals: Works for complete abstinence or reduced drinking
Less daily vigilance needed: Don’t have to avoid trace alcohol in products
Can help with spontaneous cravings: Even if you drink, it reduces the reward
Injectable option available: Vivitrol provides 30 days of coverage with one shot
Requires motivation: Won’t stop you from drinking if you’re determined to get drunk
Gradual effect: Takes time to reduce cravings; not an immediate deterrent
Possible drinking while on it: Some people drink despite reduced pleasure
Blocks beneficial opioids: Can’t use opioid pain medications if needed
Cost: Vivitrol injections can be expensive without insurance
Initial side effects: Nausea in first weeks discourages some people from continuing
Antabuse works best for people who:
Have strong external accountability:
Are committed to complete abstinence:
Want a physical barrier to impulsive drinking:
Are motivated by fear of consequences:
Don’t have certain health conditions:
Naltrexone works best for people who:
Want to address cravings:
Prefer a harm reduction approach:
Value safety if they drink:
Are self-directed in recovery:
May need opioid pain management:
Prefer less daily vigilance:
At Porch Light Health, our providers help you determine which medication aligns with your recovery goals, lifestyle, and medical history.
Some people benefit from:
Sequential use: Starting with Antabuse for early sobriety, then switching to naltrexone for long-term maintenance
Combining with other medications: Adding acamprosate to naltrexone for enhanced craving reduction
Alternating approaches: Using Antabuse during high-risk periods (holidays, stressful times) and naltrexone otherwise
Acamprosate (Campral):
Disulfiram plus naltrexone:
Gabapentin or topiramate:
At Porch Light Health, starting medication for alcohol use disorder involves:
We’ll evaluate:
Together, we’ll consider:
Medication is most effective when combined with:
If one medication doesn’t work well:
Recovery isn’t one-size-fits-all, and medication choice isn’t permanent. The goal is finding what works for you.
Whether you choose Antabuse, naltrexone, or another medication, the most important step is seeking help for alcohol use disorder. At Porch Light Health, we provide evidence-based alcohol use disorder treatment at over 60 locations across Colorado and New Mexico.
Our services include:
We accept most insurance and offer a sliding fee scale for those without coverage. Everyone deserves access to effective treatment regardless of ability to pay.
Call (866) 394-6123 today to speak with our treatment team about medication options for alcohol use disorder. We’ll help you understand which approach is right for your situation and get you started on the path to recovery.
Recovery from alcohol use disorder is possible, and medication can be a powerful tool in your journey. You don’t have to do this alone.
