EAPs are worksite-based programs designed to help identify & facilitate the resolution of behavioral, health, & productivity problems that may adversely affect employees well-being or job performance. Many cost-effectiveness studies indicate the value of EAPs in dealing with alcohol & other drug (AOD) problems. This report reviews a wide range of these studies & presents data about EAP use for AOD-related problems. Includes an overview of EAPs, & examines EAPs & prevention, cost-effectiveness studies, long-term support & follow-up, supervisory training & impact, & findings on early intervention & prevention in EAPs. References.