A case of an adult with disulfiram-induced hepatitis is presented. An etiological role for the drug was proved when the patient underwent a provocative challenge and developed evidence of hepatocellular damage, reversible on withdrawal of the drug. Disulfiram-induced liver injury is difficult to detect in a population with a high incidence of alcohol-related hepatic disease. Liver chemistries should be screened before beginning disulfiram therapy and periodically during treatment.