The 3 groups (N-acetylcysteine plus naltrexone 150 mg, naltrexone 150 mg, and naltrexone 50 mg) will be compared in a 12-week randomized, double-blind clinical trial.
The purpose of this study is to determine whether: (1) the combination of N-acetylcysteine + high-dose naltrexone (150 mg) works better than high-dose naltrexone (150 mg) alone in reducing alcohol drinking; and (2) high-dose naltrexone (150 mg) alone works better than low-dose naltrexone (50 mg) alone in reducing alcohol drinking.