Medications for Alcohol Use Disorder: Starting Naltrexone, Acamprosate, or Disulfiram Before You Leave Residential Treatment

Most people finishing residential treatment for alcohol use disorder leave with a discharge plan full of meetings, therapy appointments, and sober living options. Far fewer leave with a prescription. That gap is one of the most avoidable problems we see at discharge, and it usually comes down to logistics rather than clinical judgment: nobody started the medication early enough, the pharmacy fill was never confirmed, or the injectable was not authorized before the person walked out the door.

This guide covers what the approved medications are, how a residential program decides which one fits, and the practical steps that determine whether a medication plan actually survives the first week at home. If you are weighing treatment for yourself or someone you love, you can reach our admissions team at (877) 328-1968.

The Three Approved Medications for Alcohol Use Disorder

Three medications are currently approved in the United States to treat alcohol use disorder: naltrexone, acamprosate, and disulfiram, according to the National Institute on Alcohol Abuse and Alcoholism (NIAAA). None of the three is addictive. Naltrexone comes as a daily pill or a long-acting injection and reduces the urge to drink; acamprosate is a pill that eases the uncomfortable symptoms some people feel during early abstinence; and disulfiram is a pill that causes an unpleasant physical reaction if alcohol is consumed. Each can be used on its own or alongside counseling, and the right choice depends on liver and kidney function, other medications, and whether the goal is reducing cravings or building a hard deterrent.

A concern we hear almost every week from families is some version of “Isn’t that just swapping one drug for another?” The short answer is no. These medications do not produce a high, do not cause dependence, and are used the way a person might use a daily medication to manage blood pressure or asthma.

How Each Medication Works

Naltrexone blocks the reward signal: it reduces the pleasurable effect of alcohol and, for many people, the intensity of cravings, which makes it easier to stop after a slip rather than continue.

Acamprosate steadies early abstinence: it is thought to help rebalance brain chemistry disrupted by long-term heavy drinking, which can ease the restlessness, poor sleep, and irritability that often drive a return to alcohol in the first months.

Disulfiram creates a deterrent: it interferes with how the body breaks down alcohol, so drinking produces flushing, nausea, a pounding heart, and other symptoms that make alcohol deeply unappealing while the medication is active.

These are not interchangeable. Naltrexone is often a first choice for people whose main struggle is craving. Acamprosate is often favored for people with liver concerns, because it is cleared through the kidneys rather than the liver. Disulfiram tends to work best when someone is highly motivated and has a supportive person who helps with daily dosing. Your prescriber should explain why one is being recommended over the others.

Why Timing in Residential Treatment Matters

None of these medications treats alcohol withdrawal. Alcohol withdrawal can cause seizures and delirium tremens, which can be life-threatening. Stopping heavy, daily drinking requires medical supervision, and no one should try to detox from alcohol at home using any of these medications as a substitute. The same caution applies if benzodiazepines are also involved, because benzodiazepine withdrawal carries its own seizure risk and requires a supervised taper.

Once withdrawal has been medically managed, residential treatment is often the best window to start an AUD medication. In a residential setting, the care team can watch for side effects such as nausea, headache, or fatigue during the first days, adjust the dose, and switch medications if the first choice is not tolerated. That is much harder to do after discharge, when the first sign of trouble may simply be that the person stops taking the pill.

From practice, the single most useful rule is this: start the medication at least several days before discharge, not on discharge day. A person who leaves already taking a medication they have tolerated is far more likely to keep taking it than a person handed a new prescription on the way out.

Safety Checks Before Starting

Each medication has specific safety requirements that the medical team should review with you:

• Naltrexone and opioids: naltrexone blocks opioids. A person who has recently used any opioid, including prescribed pain medication, can be pushed into sudden, severe withdrawal. The care team needs an accurate history and typically confirms a sufficient opioid-free period before starting it. Naltrexone also means opioid pain medication will not work normally, which matters for anyone facing surgery or dental work.
• Naltrexone and the liver: prescribers usually check liver function before and during treatment.
• Acamprosate and the kidneys: because acamprosate is cleared by the kidneys, kidney function affects the dose, and it may not be appropriate for people with severe kidney impairment. It is usually taken several times a day, which is worth planning around.
• Disulfiram and hidden alcohol: disulfiram should never be given to anyone without their full knowledge and agreement, and never to someone who has been drinking recently. Reactions can be triggered by alcohol in products such as some mouthwashes, cough syrups, sauces, and hand sanitizers, and the effect can last for days after the last dose.

Tell the medical team about every medication and supplement you take, and about any history of liver disease, kidney disease, heart problems, or depression.

The Discharge Logistics That Decide Whether It Works

This is where plans fall apart, and it is almost never a medical failure. In our work coordinating discharges, the most common breakdowns are operational:

Unfilled prescriptions: the prescription was sent, but the pharmacy did not have it in stock, needed a prior authorization, or the person never picked it up.

No follow-up prescriber: the residential physician prescribed a 30-day supply, but no outpatient provider was lined up to continue it, so the medication ended when the bottle ran out.

Injectable timing: the long-acting naltrexone injection often requires insurance authorization and a clinic that stocks and administers it. If this is not arranged before discharge, the next dose can be missed entirely.

Insurance coverage for these medications varies by plan. Our team can check your benefits before admission through our insurance verification page, and our case management staff can help coordinate the outpatient prescriber and pharmacy before you leave.

Five Questions to Ask Before Your Discharge Date

Bring this list to your next meeting with your prescriber or case manager. Write down the answers.

1. Which AUD medication are you recommending for me, and why that one rather than the other two?
2. What date will I start it, and how many days will I take it here before I leave?
3. Has the prescription been sent to my pharmacy, and has someone confirmed it is in stock and covered?
4. Who is my outpatient prescriber, and what is the date of my first appointment with them?
5. If I have side effects or a slip after discharge, who do I call, and should I keep taking the medication?

If any answer is “we’ll figure that out later,” ask for it to be resolved before discharge. A slip after treatment is not a reason to stop a medication without speaking to your prescriber; for naltrexone in particular, continuing it can help keep a single drink from becoming a return to heavy drinking.

Where to Find More Help

NIAAA’s Alcohol Treatment Navigator explains how to evaluate providers who offer medications along with behavioral treatment. SAMHSA’s National Helpline at 1-800-662-4357 is free, confidential, and available 24 hours a day, 365 days a year for treatment referrals. For research on how alcohol use disorder affects the brain, the National Institute on Drug Abuse maintains additional resources.

At Bodhi Addiction Treatment in Northern California, medication for alcohol use disorder is discussed with every appropriate client as part of residential care, not treated as an afterthought at discharge. To talk through whether residential treatment and medication support fit your situation, call (877) 328-1968.

If you or someone you love is in crisis or thinking about suicide, call or text 988 to reach the 988 Suicide & Crisis Lifeline. If someone is having a seizure, is severely confused, or cannot be woken, call 911.

This article is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Medication decisions for alcohol use disorder should be made with a qualified health care provider who knows your full medical history. Never stop drinking abruptly after heavy, prolonged use without medical supervision.