Medications for alcohol: naltrexone, acamprosate, and disulfiram explained

Three medications are approved by the US Food and Drug Administration to treat alcohol use disorder: naltrexone, acamprosate, and disulfiram. NIAAA says they can help prevent a return to heavy drinking and promote abstinence, and that they are neither addicting nor complicated to prescribe, yet most people who could benefit have never been offered one. This page is information, not medical advice, and the decision to start any of them belongs with a clinician who knows your history.

What are the three medications for alcohol use disorder?

Each one works in a different way. The NIAAA consumer guide sums them up in a line each: naltrexone reduces the urge to drink, acamprosate eases the negative symptoms some people feel during abstinence, and disulfiram discourages drinking by causing unpleasant symptoms when alcohol is consumed. None of them is addictive; NIAAA compares taking one to using medicine for asthma or diabetes. None of them is a magic pill either. They work best paired with counseling, peer support, and a plan for the hours when the urge actually hits.

Why have you probably never been offered one?

Awareness, mostly, not evidence. The same NIAAA clinical resource states plainly that these medications are neither addicting nor complicated to prescribe, yet only a small fraction of people with alcohol use disorder are ever offered one. Many people never think to ask, and many clinicians trained in an era when a referral to rehab was the default response. The treatment existed; the conversation did not. Often, asking your own doctor directly is all it takes to start it. If you want the wider picture of what help looks like, our guide to where to find alcohol help maps the options.

How does naltrexone work?

Naltrexone is the one most people have in mind when they search "naltrexone for alcohol." According to NIAAA, it works by blocking the opioid receptors in the brain that are involved in the rewarding effects of drinking, which dampens the pull a drink has. It comes two ways: a daily pill or an injection given about once a month. MedlinePlus describes it as decreasing the craving for alcohol and stresses that it is meant to be used alongside counseling and social support, not on its own.

It is also worth correcting a common myth: naltrexone is not only for people who want to quit outright. NIAAA describes the approved medications as helping prevent a return to heavy drinking as well as promoting abstinence, so it can suit someone working to cut back just as much as someone going alcohol-free. The boundaries are specific rather than vague. It is not for people who are using opioids, and MedlinePlus cautions that very large doses can cause liver damage, though that is unlikely at the amounts a doctor prescribes; anyone with liver disease should say so up front. Sorting out whether it fits is precisely the kind of call a clinician makes.

How does acamprosate work?

Acamprosate takes a different angle. Rather than touching the reward of drinking, the NIAAA guide describes it as easing the negative symptoms some people feel during abstinence, the restlessness and unease that can follow stopping. For that reason it is usually started after you have already stopped drinking, not while you are still drinking. MedlinePlus says to tell your doctor if you have kidney disease before starting, since reduced kidney function calls for careful assessment. It is nonaddictive, and it often suits people who have already detoxed and want steady support holding the line.

How does disulfiram work?

Disulfiram is the oldest of the three and the most blunt. It works as a deterrent: if you drink while taking it, it sets off an unpleasant reaction. MedlinePlus describes that reaction as flushing, headache, and nausea, and warns it can occur for as long as two weeks after the last dose of the medication. Because of how it works, it should never be taken with any alcohol in your system, never be given to someone without their full knowledge, and only be started once alcohol has completely left the body. Many people use it with some form of supportive supervision so that taking it stays consistent. It tends to suit people who want a firm external line between themselves and the next drink.

What does the evidence actually show?

Modest but real, and on par with medicines we accept without a second thought. The largest synthesis is a 2014 JAMA meta-analysis by Jonas and colleagues, which pooled dozens of trials covering thousands of people. It measured benefit as the number needed to treat: how many people have to take a medication for one additional person to avoid a bad drinking outcome. Lower numbers mean a stronger effect. The review found no significant difference between acamprosate and naltrexone for keeping people from returning to any drinking.

Put plainly, for every dozen or so people who take acamprosate, one more stays on track than would have on placebo. That is a similar order of help to medicines prescribed for plenty of other chronic conditions. It is not a guarantee, and it is not nothing.

Is there an Ozempic-style drug for alcohol?

Not yet, but it is being studied seriously. A 2025 randomized clinical trial in JAMA Psychiatry tested low-dose semaglutide, the compound in some GLP-1 medications, in a phase 2, double-blind study of 48 adults over nine weeks. The authors reported initial evidence that it can reduce craving and some drinking outcomes, enough to justify larger clinical trials, and no more than that. Two things are worth holding onto: the trial was small, and GLP-1 drugs are not FDA-approved for alcohol use disorder. The approved starting points remain the three above. If a clinician raises a GLP-1 for your situation, that is a conversation to have with clear eyes about how early the science still is.

How do people actually get these medications?

Through a licensed clinician, in one of a few ways. The most direct is your own primary care doctor, who can prescribe all three. If you would rather start with a specialist or a directory, the NIAAA Alcohol Treatment Navigator and the federal FindTreatment.gov directory both point to prescribers near you. There are also telehealth programs built specifically around alcohol medication. As of June 2026, Oar Health runs a naltrexone-focused service by video, and Ria Health offers a program that combines FDA-approved alcohol medications with counseling and coaching. We name them as examples, not endorsements, and have no affiliation with either. In every route, a licensed clinician evaluates whether a medication is right for you. No legitimate service ships these without that step.

What does medication not do on its own?

It does not rewrite the 9 p.m. habit. A pill can lower the volume of a craving, but the reflex to reach for a drink after a hard day is a learned loop, and unlearning it takes counseling, support, and some daily structure to lean on. That is why every source above frames medication as one part of a plan rather than the whole of it. If the urge itself is your sticking point, our guide to stopping cravings in the moment covers the behavioral side, and quitting without AA walks through support that is not a meeting in a church basement.

That behavioral layer is where Orlyn, our iOS app, fits: one-tap daily check-ins, a craving SOS for the hard minutes, and a 24/7 coach that is clearly labeled AI, not a clinician and not medical care. It is a complement to treatment and to mutual-support groups, never a replacement for either, and it does not prescribe or manage medication. If a medication is right for you, that decision lives with your doctor.

When is stopping a medical question, not just a personal one?

When your body has come to expect alcohol every day. None of these medications is meant for someone who is still drinking heavily and then stops cold on their own. NIAAA warns that quitting suddenly after a long stretch of heavy daily drinking can be painful and even life-threatening, which is why a clinician should be involved before you stop. If you want to know what that process looks like hour by hour, our alcohol withdrawal timeline lays it out, and if symptoms like shaking, a racing heart, confusion, or seizures appear, treat that as urgent and use our crisis resources right away.

One last caution. The shelves are full of unregulated "anti-craving" supplements that borrow the language of these medications without any of the evidence behind them. They are not among the FDA-approved options and have not been tested the way the three above have. If you want something that actually moves the needle, the honest answer is the one this page opened with: information like this is a starting point, and the decision belongs with a clinician who can match a real treatment to your history. Our guide to how to stop drinking covers the wider plan around whatever you and your doctor choose.

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