The document summarizes addiction services in the Northern Area of Dublin, including historical development, current services, client pathways, and future challenges. It describes the development of services in response to HIV in the late 1980s/early 1990s and increasing numbers accessing services from 1994 to 2009. It outlines the current range of prevention, treatment, and rehabilitation services offered across four tiers and the client referral process. Future challenges discussed include developing comprehensive assessment, greater interagency collaboration, changing needs and philosophies, and financial pressures.