TL;DR
Three FDA-approved medications treat alcohol use disorder (AUD): naltrexone, acamprosate, and disulfiram. All three work differently, and none of them produces a high or causes physical dependence. They are not sedatives and they are not replacement addictions.
Naltrexone blocks the rewarding effects of alcohol by acting on opioid receptors. It’s generally considered best for people whose goal is to reduce heavy drinking or binge drinking, and works even if drinking continues during treatment. Available as a daily pill or a monthly extended-release injection (Vivitrol).
Acamprosate stabilizes the brain chemistry disrupted by long-term drinking, making it easier to maintain abstinence once you’ve already stopped. It works best for people who have already detoxed and are committed to staying sober. Taken three times a day.
Disulfiram (Antabuse) causes severely unpleasant physical reactions if you drink while taking it. It works as a deterrent rather than a craving reducer. Effective for highly motivated people with stable support, but no longer considered first-line due to adherence challenges.
Choosing among them depends on your drinking goals (cutting back vs. full abstinence), your history, and your preferences. None of them is a standalone solution — medication works best alongside therapy, behavior change, and recovery community.
At Healthy Life Recovery in San Diego, we integrate medication-assisted treatment with evidence-based therapy and our outpatient alcohol rehab programs to give people the tools they need for lasting recovery.
The Medication Conversation People Don’t Have
When someone decides to do something about their drinking, the first conversation is usually about therapy, support groups, or rehab. Medication often doesn’t come up at all — or comes up as an afterthought. That’s a problem, because for many people with alcohol use disorder, the right medication substantially improves their odds of succeeding.
Part of the gap comes from stigma. There’s a widespread assumption that “real” recovery means doing it without pharmaceutical help, and that using medication for alcohol is somehow cheating or incomplete. This framing doesn’t reflect how AUD actually works in the brain, and it isn’t how clinicians approach the treatment of other chronic conditions.
Part of the gap is simple unfamiliarity. Most people have heard of Antabuse from movies or TV, but naltrexone and acamprosate — both of which are significantly more useful for most patients — are often unknown outside addiction medicine. The result is that people miss out on tools that could meaningfully help them.
This guide walks through what each of the three FDA-approved medications actually does, who each one works best for, what the research shows about effectiveness, and how medication fits into a broader treatment plan.
First, What AUD Medication Isn’t
It’s worth clearing up some misconceptions before getting into the specific medications.
AUD medications don’t produce a high. None of naltrexone, acamprosate, or disulfiram has euphoric effects, causes sedation, or creates the kind of reinforcing experience that drives addiction. You can’t get addicted to any of them — there’s nothing to get addicted to.
They aren’t a substitute for therapy. Medication addresses the physical and neurochemical dimensions of AUD. It doesn’t address the underlying reasons people drink, the behavioral patterns that developed around drinking, or the social and emotional factors that sustain the disorder. Medication works best when it’s one part of a comprehensive treatment approach.
They don’t work the same way for everyone. Different medications suit different people. Someone who is trying to cut back on binge drinking has different needs from someone who has already quit and is trying to stay quit. Matching the medication to the person’s situation is what a good clinical assessment does.
And critically: they work. Despite being underutilized, all three medications have substantial evidence of effectiveness when used appropriately. A comprehensive JAMA systematic review and meta-analysis of AUD pharmacotherapy confirms that medication-assisted treatment produces meaningful improvements in drinking outcomes across multiple measures.
Naltrexone: The Heavy-Drinking Disruptor
Naltrexone is an opioid receptor antagonist — meaning it binds to opioid receptors in the brain but doesn’t activate them, which blocks other opioids (including the body’s own endorphins) from having their normal effect.
The connection to alcohol isn’t immediately obvious, but it’s well-established. When someone drinks alcohol, the brain releases endogenous opioids that activate the reward pathway, producing the pleasurable, relaxing, euphoric feelings that make drinking reinforcing. Naltrexone blocks that reward signal. Peer-reviewed research on naltrexone’s mechanism describes its effect as reducing dopamine release triggered by alcohol, which diminishes the rewarding effects of drinking.
The practical consequence: people on naltrexone who drink often report that alcohol just doesn’t feel the way it used to. The first drink doesn’t lead as automatically to the second, the buzz is muted, and the escalating cycle of heavy drinking becomes much easier to interrupt. This is why naltrexone is sometimes described as making it easier to say no to the second drink — the reinforcement that usually drives continued drinking is weakened.
Who it works best for. Naltrexone is generally the first-line medication for people whose primary problem is heavy or binge drinking rather than maintaining complete abstinence. It’s effective whether or not the person has fully detoxed, though research suggests outcomes are better when patients begin treatment while abstinent.
How it’s taken. Oral naltrexone is a once-daily 50 mg tablet. An extended-release injectable form (brand name Vivitrol) is given once a month and can be helpful for people who struggle with daily medication adherence.
Research evidence. A meta-analysis of 64 randomized placebo-controlled trials found that naltrexone is significantly more effective than placebo at reducing heavy drinking and craving. In head-to-head research, naltrexone consistently shows stronger effects on heavy drinking outcomes than acamprosate.
Cautions. Naltrexone can’t be used by people currently taking opioids or who need opioid pain medications, since it blocks opioid effects and can trigger withdrawal. It requires liver function monitoring. Common side effects include nausea, headache, and fatigue, which usually improve within the first few weeks.
Acamprosate: The Abstinence Stabilizer
Acamprosate works through a completely different mechanism. Long-term alcohol use disrupts the brain’s balance between excitatory (glutamate) and inhibitory (GABA) neurotransmitter systems. When someone with chronic AUD stops drinking, that imbalance doesn’t resolve immediately — the brain remains in a state of hyperexcitability that drives protracted withdrawal symptoms, sleep disturbance, anxiety, and ongoing cravings for weeks or months.
Acamprosate helps normalize this imbalance. It’s thought to modulate glutamate and GABA signaling, which reduces the neurochemical stress that makes early sobriety so uncomfortable. It doesn’t block rewards like naltrexone, and it doesn’t affect drinking itself — it works by making abstinence more sustainable.
Who it works best for. Acamprosate is the go-to medication for people who have already detoxed and stopped drinking, and whose goal is to stay stopped. It’s particularly useful for people with longer drinking histories, where the post-acute withdrawal syndrome is more pronounced.
How it’s taken. Two 333 mg tablets, three times a day — the dosing regimen is acamprosate’s biggest practical drawback. Missing doses can reduce effectiveness.
Research evidence. The same meta-analysis of 64 clinical trials found that acamprosate is significantly more effective than naltrexone at maintaining complete abstinence — people on acamprosate are more likely to stay sober once they’ve stopped drinking. Effects are strongest when medication is started after a period of detoxification.
Cautions. Acamprosate is generally well-tolerated with minimal drug interactions. It’s safe for people with liver disease (unlike naltrexone) and has no abuse potential. The main side effect is transient diarrhea. It can’t be used in people with significant kidney disease.
Disulfiram: The Deterrent
Disulfiram (brand name Antabuse) is the oldest of the three medications, first used for AUD in the 1950s. It works completely differently from the other two — it doesn’t affect craving, reward, or brain chemistry. It’s a deterrent.
Normally, when you drink alcohol, your body breaks it down in two steps: alcohol becomes acetaldehyde, and acetaldehyde becomes acetic acid. The second step is what prevents acetaldehyde from accumulating (acetaldehyde is what makes you feel sick when you drink too much). Disulfiram blocks the enzyme responsible for the second step. The result: if you drink while taking disulfiram, acetaldehyde accumulates rapidly and produces severe reactions — flushing, nausea, vomiting, chest pain, palpitations, and in severe cases, life-threatening cardiovascular effects.
The deterrent is purely behavioral. The medication doesn’t reduce your desire to drink; it just makes drinking acutely miserable and potentially dangerous.
Who it works best for. Disulfiram works for highly motivated people with strong support systems who have committed to complete abstinence and who don’t have ambivalence about that commitment. It’s particularly effective when someone else (a spouse, a family member, or a treatment provider) supervises the daily dose, which dramatically improves adherence.
How it’s taken. Once-daily oral tablet (250 mg).
Research evidence. Disulfiram shows mixed results in clinical trials, largely because adherence is the central issue — when people stop taking it, the deterrent disappears. In studies with supervised dosing, outcomes improve substantially. Clinical guidelines now generally consider disulfiram second-line behind naltrexone and acamprosate because of these adherence challenges.
Cautions. The disulfiram-alcohol reaction can be genuinely dangerous. Patients need to avoid all sources of alcohol including mouthwash, some cough syrups, and certain foods (vinegar, fermented products). The reaction can occur up to two weeks after stopping the medication. Disulfiram has significant drug interactions and isn’t suitable for people with cardiovascular disease, liver disease, or psychiatric conditions that might compromise judgment.
How the Medications Compare
The three medications aren’t interchangeable — they’re tools for different situations.
Naltrexone and acamprosate are both first-line. Most clinical guidelines recommend starting with one of these before considering disulfiram. The choice between them depends mostly on the patient’s goals and situation: naltrexone if the target is reducing heavy drinking or the patient may continue to drink occasionally; acamprosate if the patient has already stopped and wants to stay stopped.
Combining medications is possible. Some patients benefit from naltrexone plus acamprosate together, addressing both the reward system and the neurochemical instability of early sobriety. The combination has evidence of effectiveness, though it’s not necessary for everyone.
Disulfiram is specialized. It’s the right choice for a specific subset of patients but not the default. People who have tried and failed on naltrexone or acamprosate, or who specifically want a deterrent-based approach, may benefit from disulfiram — particularly with supervised dosing.
All three are underutilized. Despite the evidence, a minority of people with AUD receive any medication as part of their treatment. Bringing up medication with a treatment provider is almost always worth doing.
Medication Isn’t a Standalone Solution
One consistent finding across the research: AUD medications work best as part of a comprehensive treatment approach that includes therapy, behavioral change, and recovery support. Medication addresses the neurochemistry; everything else addresses the reasons people drink in the first place.
Cognitive behavioral therapy is particularly well-supported for AUD, helping patients identify the thoughts, situations, and emotional triggers that drive drinking and develop alternative coping strategies. Group therapy, peer support (including 12-step programs and SMART Recovery), and family involvement all add meaningful value beyond medication alone.
For people with co-occurring mental health conditions — depression, anxiety, PTSD, trauma histories — treatment needs to address both the AUD and the underlying conditions simultaneously. Drinking often serves a self-medication function, and resolving the underlying issue is part of making sobriety sustainable.
For people whose drinking has reached a level where withdrawal is a concern, medically supervised detox comes before maintenance medication. Alcohol withdrawal can be dangerous in severe cases, and starting naltrexone or acamprosate is typically done after detox is complete.
How Healthy Life Recovery Approaches AUD Treatment
At Healthy Life Recovery, medication for alcohol use disorder is integrated into our broader outpatient treatment rather than offered as a standalone prescription. When medication is the right tool, we combine it with our outpatient rehab and Evening IOP programs, individual and group therapy, and — when needed — medically supervised detox to get through the initial withdrawal phase safely.
Our San Diego alcohol rehab programs match each client with an approach that fits their actual situation rather than defaulting to a single protocol. For clients whose primary issue is binge drinking or heavy weekend use, naltrexone combined with CBT and lifestyle work often produces strong results. For clients coming out of detox who need help maintaining abstinence, acamprosate plus our Four Pillars programming (exercise, nutrition, community, education) addresses both the neurochemical and behavioral sides of early recovery. For clients with co-occurring mental health conditions, our dual diagnosis approach treats both together.
We don’t push medication on clients who don’t want it, and we don’t withhold it from clients who would benefit. The decision is collaborative, evidence-based, and revisited over time as recovery progresses.
Take the Next Step
If you’re thinking about medication as part of your approach to alcohol use disorder — or trying to figure out whether the medication you’re on is the right fit — the most useful step is talking to a clinician who works with all three options and can assess your specific situation.
Contact Healthy Life Recovery at (844) 252-8347 or reach out through our website for a confidential conversation about MAT for alcohol and how it fits into our outpatient programs. The medications work. The question is finding the right one for you.Share
