Naltrexone is taken once daily in pill form when used to treat alcohol use disorder.
Naltrexone (brand name: ReVia) is a medicine that reduces your desire for alcohol when you try to stop drinking. Naltrexone may help you stay sober for a long time. Although your doctor has prescribed naltrexone to help you stop drinking, this medicine is not a complete cure for your alcoholism. It can help you stop drinking while you get other treatments that your doctor will talk about with you.
You should be careful not to take any narcotics such as codeine, morphine or heroin at the same time you take naltrexone. Don’t even take any cough medicine with codeine in it while you are taking naltrexone. You must stop taking all narcotics for 48 hours before you start taking naltrexone. If you don’t, you could get withdrawal symptoms.