This data briefing summarises the main findings from the 2004-05 Alcohol and Other Drug Treatment Services (AODTS) NMDS data for Tasmania. Throughout this briefing, data from Tasmania are presented along with 2004-05 national AODTS-NMDS data. Highlights include: 12 government-funded alcohol and other drug treatment agencies provided 1,921 'closed treatment episodes'; almost one-third (31%) of closed treatment episodes were for clients aged 20-29 years and just over one-quarter (26%) were for clients aged 30-39 years; male clients accounted for 59% of all closed treatment episodes.