Naltrexone has been sitting in pharmacies since the 1990s, FDA-approved to treat alcohol use disorder, available for roughly $1.60 a pill – and largely ignored by both patients and doctors. A 2023 systematic review in JAMA covering 118 clinical trials and nearly 21,000 participants found it meaningfully reduces return to heavy drinking. Fewer than 2% of people with alcohol use disorder have ever received an FDA-approved medication for it. The drug recently acquired a new nickname online – the “Ozempic of alcohol” – and the comparison, however imprecise, has introduced millions of people to a treatment option that has existed for decades.
The drug is naltrexone, and the question behind the viral label is worth asking seriously: what do people actually need to know about it?
Naltrexone’s history is older than most people assume. According to the NCBI, naltrexone was initially developed to treat opioid dependence and received FDA approval for that use in 1984. It was then approved to treat alcohol use disorder in 1994. That is four decades of clinical use.
How Naltrexone Actually Works
The brain’s reward system runs partly on opioid receptors – the same receptors targeted by heroin and prescription painkillers. When a person drinks, alcohol triggers the release of endorphins (natural feel-good chemicals), which bind to those receptors and generate a pleasant, reinforcing effect. That reinforcement is a core driver of repeated drinking. Naltrexone blocks those opioid receptors, dampening the brain’s rewarding response to alcohol. This process, known as pharmacologic extinction, diminishes alcohol’s reinforcing properties and can lead to reduced drinking over time.
In practical terms: alcohol stops feeling as good. For someone who drinks partly because it reliably delivers a dopamine payoff, removing that payoff changes the equation. Over repeated exposures – drinking while on naltrexone – the brain gradually unlearns the association between alcohol and pleasure, and cravings tend to follow the reward downward.
This is distinct from how GLP-1 drugs like Ozempic work. Semaglutide mimics a gut hormone involved in appetite signaling, slows digestion, and acts on different receptors in the brain to reduce hunger. Naltrexone and Ozempic share almost no pharmacological common ground. The “Ozempic of alcohol” framing works as a cultural shorthand – a cheap, established drug that may blunt a destructive craving – but it should not be taken literally. Naltrexone is not a weight-loss drug, does not suppress appetite broadly, and is not new.
What the Evidence Shows on Naltrexone Alcohol Reduction
The 2023 systematic review published in JAMA, covering 118 clinical trials and 20,976 participants, found that oral naltrexone at 50mg per day had a number needed to treat of 18 for return to any drinking and a number needed to treat of 11 for return to heavy drinking. In plain language: for every 11 people treated with naltrexone, one fewer person returned to heavy drinking compared to those who received a placebo. That is a meaningful clinical benefit, though not a guarantee.
Across the broader research base, the picture is one of real but modest efficacy. The same JAMA review concluded that, alongside psychosocial interventions, oral naltrexone at 50mg daily and acamprosate stand as first-line pharmacotherapies for alcohol use disorder. The differences between naltrexone and placebo, while consistent, are not enormous. Naltrexone is a legitimate medical tool, not a miracle.
One area where naltrexone’s advantage over alternatives is clearest is flexibility of goals. Patients can take it whether they are abstinent from alcohol or simply want to reduce their drinking. Many people assume that everyone who struggles with alcohol misuse needs to give up drinking altogether, but abstinence is difficult to achieve for some and can be a barrier to treatment.
According to SAMHSA, hospitalizations related to alcohol use disorder are common, yet few patients receive pharmacotherapy consistent with guideline recommendations. The 2023 National Survey on Drug Use and Health, published by SAMHSA, found that 28.9 million people aged 12 and older in the United States had alcohol use disorder. NIAAA has noted that fewer than 2% of people with alcohol use disorder received an FDA-approved medication for it. The treatment gap is substantial.
Who May Benefit – and Who Should Be Careful
The FDA has warned that naltrexone carries a risk of hepatic (liver) injury and advises patients to seek medical attention if they experience any symptoms of acute hepatitis, in which case naltrexone should be discontinued. According to SAMHSA, people with acute hepatitis or active liver failure should not take naltrexone. People with chronic but compensated liver disease may be able to take naltrexone, but this requires a physician to assess individual risk.
The most important safety caveat involves opioid medications. Naltrexone should not be taken by people currently receiving opioid analgesics, those dependent on opioids, or those maintained on opioid agonists such as methadone or partial agonists such as buprenorphine. Because naltrexone blocks opioid receptors completely, taking it while opioids are in the system can trigger immediate and severe withdrawal. Naltrexone should only be started under medical supervision, after a period of opioid clearance.
Naltrexone does not treat alcohol withdrawal symptoms. It is designed to suppress cravings, not withdrawal. Individuals with moderate to severe alcohol use disorder who are using naltrexone may experience withdrawal symptoms if they suddenly stop drinking – symptoms that can include dangerous seizures. These individuals should consult with a physician before discontinuing alcohol use.
For people with alcohol use disorder connected to underlying anxiety, depression, or trauma, medication alone is unlikely to address the full picture. Clinicians recommend that people looking to stop drinking or reduce their intake consider naltrexone as part of a comprehensive treatment approach that also involves psychological counseling and behavioral support.
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The Forms Naltrexone Comes In
According to SAMHSA, naltrexone can be prescribed and administered by any practitioner licensed to prescribe medications. It is available in pill form for alcohol use disorder, taken daily, or as an extended-release injectable formulation administered once a month by a practitioner. The once-monthly injection, sold under the brand name Vivitrol, removes the issue of daily adherence – for people who struggle to remember a daily pill or who worry about motivation dipping, a monthly clinic visit can be a structural advantage.
The standard oral dose is 50mg daily. Some clinicians start patients at 25mg for the first week to reduce the chance of nausea as the body adjusts. Meta-analyses show that injectable naltrexone produces modest reductions in drinking days per month compared to placebo – a finding consistent with naltrexone’s stronger track record on reducing heavy drinking than on achieving full abstinence.
Drinking less, even without stopping entirely, carries real health benefits. Cutting heavy drinking reduces the risk of liver disease, certain cancers, cardiovascular events, and accidents. For someone who has been drinking a bottle of wine a night and gets down to two glasses twice a week, that is a clinically meaningful change even if it does not register as sobriety in a traditional sense.
Other Approved Options Alongside Naltrexone
Naltrexone is one of three FDA-approved medications for alcohol use disorder. As the NIAAA notes, acamprosate and disulfiram are also approved to help people stop or reduce drinking and prevent relapse. Each works differently, and each has its own risk profile.
Disulfiram interferes with alcohol metabolism, causing flushing, nausea, and vomiting if a person drinks while taking it. It also requires strict abstinence; drinking while on disulfiram is not just uncomfortable, it can be dangerous. Acamprosate stabilizes brain chemistry during abstinence, but carries a monitoring requirement because of a small risk of suicidal thoughts in some users.
Alongside medication, behavioral treatments – cognitive behavioral therapy, motivational enhancement therapy, and peer support groups – have solid evidence behind them. Combining medication with behavioral support tends to produce better outcomes than either alone.
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What This Means for You
Naltrexone has decades of clinical evidence behind it, an established safety profile, and a cost low enough that access is not the primary barrier. Clinicians recommend monitoring for potential adverse effects, including hepatotoxicity, and combining naltrexone with behavioral interventions to optimize treatment outcomes. If you are wondering whether it might be appropriate for you or someone close to you, a conversation with a primary care physician, psychiatrist, or addiction medicine specialist is the right first step. The opioid interaction risk alone makes self-prescribing genuinely dangerous – naltrexone is a prescription medication for good reason.
Prescribing naltrexone for alcohol misuse remains one of the most underutilized interventions in medicine. That gap exists partly because of stigma – people are reluctant to seek help for alcohol problems, and many doctors do not proactively discuss medication options. The viral attention around the “Ozempic of alcohol” nickname has made more people aware that a low-cost, FDA-approved option has existed for 30 years and is worth asking about. That conversation belongs in a doctor’s office.
Disclaimer: The author is not a licensed medical professional. The information provided is for general informational and educational purposes only and is based on research from publicly available, reputable sources. It is not intended to constitute, and should not be relied upon as, medical advice, diagnosis, or treatment. Always consult a licensed physician or other qualified healthcare provider regarding any medical condition, symptoms, or medications. Do not disregard, avoid, or delay seeking professional medical advice or treatment because of information contained herein.
AI Disclaimer: This article was created with the assistance of AI tools and reviewed by a human editor.
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