Seventy-two pathological gambling patients were followed-up after treatment in a combined alcohol, substance abuse and compulsive gambling treatment program. The Addiction Severity Index (modified for use with pathological gamblers) was used to evaluate the effectiveness of treatment. Patients reduced their intake of alcohol, other drugs and their gambling as well as improved in legal, family/social, and psychological functioning. There was a trend for improvement in medical condition and no net change in employment functioning. The study supports the idea that combined treatment is an effective way of dealing with patients whose gambling problems are discovered when they enter treatment for another addiction, as well as for patients whose initial complaints include pathological gambling, with or without additional problems.