Naltrexone

Naltrexone Hydrochloride Tablets USP, an opioid antagonist, are a synthetic congener of oxymorphone with no opioid agonist properties. Naltrexone differs in structure from oxymorphone in that the methyl group on the nitrogen atom is replaced by a cyclopropylmethyl group.

When used as a treatment for alcohol dependency, naltrexone blocks the euphoric effects and feelings of intoxication. This allows people with alcohol addiction to reduce their drinking behaviors enough to remain motivated to stay in treatment and avoid relapses. Naltrexone is not addictive nor does it react adversely with alcohol.

Long-term naltrexone therapy extending beyond three months is considered most effective by researchers, and therapy may also be used indefinitely. Learn more about alcohol use disorders.