Alcohol use disorder is a serious medical condition, and recovery requires more than willpower alone. Naltrexone is an FDA-approved medication that reduces the rewarding effects of alcohol, helping to decrease cravings and support sustained recovery. Used alongside counseling and behavioral therapy, naltrexone has helped countless individuals achieve and maintain sobriety.
What Is Naltrexone?
Naltrexone is an opioid antagonist—a medication that blocks opioid receptors in the brain. While it was originally developed to treat opioid addiction, research demonstrated its effectiveness for alcohol use disorder. It's available in oral form (taken daily) or as a monthly injectable (Vivitrol), giving patients flexibility in treatment options.
How Does Naltrexone Reduce Alcohol Cravings?
When alcohol is consumed, it triggers the release of endogenous opioids in the brain—natural chemicals that create pleasure and reward. This pleasure cycle reinforces drinking behavior and intensifies cravings. Naltrexone blocks opioid receptors, interrupting this reward pathway. Without the reinforcing pleasure, the motivation to drink diminishes substantially.
This mechanism is particularly powerful because it addresses the biological underpinning of cravings, not just willpower or habit. By reducing the brain's reward response to alcohol, naltrexone makes it easier for individuals to resist triggers and maintain their commitment to recovery.
Efficacy and What Research Shows
Clinical studies demonstrate that naltrexone reduces heavy drinking days by approximately 25-50% compared to placebo, and it significantly lowers relapse rates. For individuals who slip and drink, naltrexone dampens the rewarding sensation, making it less likely to spiral into a full relapse.
Naltrexone vs. Other Medications for Alcohol Recovery
The two primary medications for alcohol use disorder are naltrexone and acamprosate. While naltrexone works on the reward system, acamprosate stabilizes brain chemistry by modulating glutamate and GABA. Some prescribers may combine both medications for additive effect. Disulfiram (Antabuse) works differently—it creates an unpleasant reaction if alcohol is consumed, relying on aversive conditioning. Your psychiatrist will recommend the best option based on your clinical picture.
Starting Naltrexone: What to Expect
Most patients begin with the oral form (50 mg daily). A baseline liver function test is essential, as naltrexone is processed by the liver. Side effects may include nausea (usually mild and transient), fatigue, or headache. The monthly injectable form (Vivitrol 380 mg) eliminates daily pill-taking but requires clinic visits.
Improvement in cravings often becomes noticeable within the first 1-2 weeks, though full therapeutic benefit may take several weeks. Consistency is critical—skipping doses reduces effectiveness.
Important Considerations and Safety
- Naltrexone must not be started until you are fully detoxified (typically 7-10 days alcohol-free).
- Inform your prescriber about all medications and supplements, as interactions are possible.
- If you have opioid-use disorder or take opioid pain medications, naltrexone is not appropriate.
- Do not suddenly stop naltrexone without medical guidance—gradual tapering prevents withdrawal symptoms.
- Regular follow-up appointments are essential to monitor liver function, assess efficacy, and adjust treatment as needed.
Naltrexone as Part of Comprehensive Recovery
Medication alone does not cure alcohol use disorder. Naltrexone is most effective when combined with psychotherapy, support groups (like AA or SMART Recovery), lifestyle changes, and treatment of co-occurring mental health conditions such as depression or anxiety.
Medication-Assisted Treatment at Next Step Psychiatry
At Next Step Psychiatry in Lilburn, GA, Dr. Aneel Ursani and Fathima Chowdhury, PA-C specialize in medication-assisted treatment for alcohol and opioid use disorders. We conduct comprehensive evaluations to determine if naltrexone is right for you, provide medical supervision throughout treatment, and integrate psychiatric care with behavioral health referrals.
Recovery is possible. If you or a loved one is struggling with alcohol, we're here to help.
Frequently Asked Questions
Can I drink while taking naltrexone?
Technically, naltrexone does not prevent you from drinking. However, the medication blocks the rewarding effects of alcohol, making drinking significantly less appealing. The goal is to use naltrexone to support your commitment to abstinence or greatly reduced drinking.
How long do I need to take naltrexone?
Duration varies. Some individuals take it for 6-12 months, while others benefit from longer-term use. Your prescriber will help you determine the appropriate timeline based on your progress, risk factors, and personal goals.
Does naltrexone have withdrawal symptoms?
Naltrexone itself is not addictive and does not cause dependence. However, stopping suddenly may lead to discomfort. Always taper under medical guidance to avoid unpleasant side effects.
When to See a Psychiatrist
If you're struggling with alcohol and considering medication-assisted treatment, or if you've tried recovery before and need additional support, a psychiatrist can evaluate whether naltrexone is appropriate and monitor your progress. Early intervention improves outcomes.
Talk to Next Step Psychiatry
Recovery from alcohol use disorder is achievable with proper medical and psychological support. Contact us today to discuss your options.
4145 Lawrenceville Hwy STE 100, Lilburn, GA 30047 • 678-437-1659
Disclaimer: This article is for educational purposes and does not replace professional medical advice. Always consult with a licensed psychiatrist before starting, stopping, or changing any medication.