Vivitrol / ReVia Withdrawal & Tapering Guide

Common withdrawal symptoms of Vivitrol / ReVia (naltrexone) include: mild — naltrexone itself does not produce dependence, underlying alcohol/opioid cravings can return without the medication-supported buffer. Symptom severity varies by individual, dose, and duration of use.

For oral naltrexone, most patients can stop without taper. For depot, the long half-life provides a natural taper. Plan for return of cravings. Naltrexone is not dependence-forming; the main risk on discontinuation is loss of the medication-supported buffer against the underlying disorder, not pharmacological withdrawal.

Vivitrol / ReVia withdrawal typically begins Days (oral) or weeks (depot wear-off), peaks around 1-2 weeks, and resolves within Usually 2-4 weeks. Rare for the medication itself; the underlying condition is the main long-term consideration

Stopping Vivitrol / ReVia abruptly is not recommended. Its half-life is 4 hours (parent); 13 hours (active metabolite 6β-naltrexol); 5-10 days (Vivitrol depot), and the receptor adaptations built up during treatment do not reverse at that speed, so a sudden stop tends to produce the sharpest withdrawal. Prescribing guidance favours gradual, proportional reductions agreed with your prescriber.

Vivitrol / ReVia (naltrexone) has a half-life of 4 hours (parent); 13 hours (active metabolite 6β-naltrexol); 5-10 days (Vivitrol depot). As a rule of thumb, a drug is mostly cleared after about five half-lives. Withdrawal symptoms often begin before the drug has fully cleared and continue after it has, because the adaptations the brain made during treatment reverse more slowly than the drug leaves the blood.