For alcohol use disorder and opioid use disorder, the usual dosage of naltrexone is 50 milligrams (mg) daily. But lower doses of naltrexone may be prescribed off-label for other uses. (With off ...

2012;5(4):427-435. Naltrexone is relatively well tolerated, and the primary side effects are gastrointestinal discomfort. Higher doses (above 50 mg/day) have been suggested to increase the risk of ...