This medication is used to treat alcohol abuse. It is used only in people who have been able to stop drinking for some time before starting treatment with naltrexone. You should not be drinking when you start naltrexone. It can help people drink less alcohol or stop drinking altogether. Naltrexone works in the brain to decrease the desire to drink. It does not work like some other treatments for alcohol abuse (e.g., disulfiram). It will not make you sick when taken with alcohol.
This medication is also used to prevent relapse to opioid abuse, after opioid detoxification. It works by blocking the action of opioids. This medication must not be used in people currently taking opiates, including methadone. Doing so can cause sudden withdrawal symptoms.
Naltrexone belongs to a class of drugs known as opiate antagonists. It is used as part of a complete treatment program for alcohol or opioid abuse (e.g., counseling, 12-step program, lifestyle changes).
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