Alcohol and Naltrexone interaction
Alcohol and Naltrexone: the Naltrexone prescribing label mention this combination without an instruction to avoid it or change the dose.
Mentioned, no instruction to avoid. Worth knowing; rarely a reason to change anything on its own.
What the FDA labels say
From the Naltrexone label · effective 2026-01-30
Precipitation of Opioid Withdrawal : Opioid-dependent and opioid-using patients, including those being treated for alcohol dependence, should be opioid-free before starting naltrexone for extended-release injectable suspension treatment, and should notify healthcare providers of any recent opioid use.
To prevent occurrence of precipitated withdrawal in patients dependent on opioids, or exacerbation of a pre-existing subclinical withdrawal syndrome, opioid-dependent patients, including those being treated for alcohol dependence, should be opioid-free (including tramadol) before starting naltrexone for extended-release injectable suspension treatment.
Patients treated for alcohol dependence with naltrexone for extended-release injectable suspension should also be assessed for underlying opioid dependence and for any recent use of opioids prior to initiation of treatment with naltrexone for extended-release injectable suspension.
Precipitated opioid withdrawal has been observed in alcohol-dependent patients in circumstances where the prescriber had been unaware of the additional use of opioids or co-dependence on opioids.
In the 24-week, placebo-controlled pivotal trial in 624 alcohol-dependent patients, adverse events involving depressed mood were reported by 10% of patients treated with naltrexone for extended-release injectable suspension 380 mg, as compared to 5% of patients treated with placebo injections.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.