Several studies have shown that cranial electrotherapy stimulation (CES) is useful in treating brain dysfunction associated with alcoholism. A double-blind study replicated the latest of these findings in 60 inpatients and extended them by treating individuals with alcoholism and other chemical dependencies. Treatment effects were assessed on three subscales of the WAIS that are clinical indicators of organic brain syndrome. No placebo effect was found. CES appears to be a valuable adjunct to rehabilitation programs for addicted persons and can effect changes in areas not addressed by other treatment modalities.