Naltrexone vs Disulfiram (Antabuse) for Alcohol Addiction: Side-by-Side Comparison (2026)

Key Differences Explained

Naltrexone and disulfiram take fundamentally different approaches to alcohol addiction. One reduces the desire to drink; the other makes drinking physically unbearable. Understanding this distinction helps match the right medication to the right patient.

Naltrexone blocks opioid receptors in the brain, reducing the pleasurable effects of alcohol. Over time, the brain learns that drinking doesn't produce the expected reward, gradually extinguishing the craving cycle. This is called pharmacological extinction (the Sinclair Method). Naltrexone is available as a daily pill (ReVia) or monthly injection (Vivitrol). It's the only alcohol medication that also treats opioid addiction.

Disulfiram (Antabuse) inhibits the enzyme aldehyde dehydrogenase, causing acetaldehyde to build up when alcohol is consumed. The result: intense nausea, vomiting, flushing, headache, and rapid heartbeat within 10-30 minutes of drinking. It's an aversion therapy — the fear of becoming violently ill deters drinking. It does NOT reduce cravings.

Which Is More Effective?

Naltrexone has stronger clinical evidence overall. A meta-analysis in JAMA (2014) showed naltrexone reduces heavy drinking days by 17% more than placebo. Disulfiram's effectiveness depends heavily on supervised administration — when a spouse, pharmacist, or clinician watches the patient take it daily, outcomes are excellent. Without supervision, many patients simply stop taking it before drinking.

A third option, acamprosate (Campral), reduces post-withdrawal discomfort and works well as an add-on to naltrexone. Discuss all options with your physician. Call (833) 567-5838 for providers who prescribe alcohol addiction medications.