What proportion of alcohol and other drug treatment episodes in Australia are due to cannabis use?

In 2013-14, cannabis was the principal drug of concern in 24% of all alcohol and other drug treatment episodes in Australia. 

In 2013-14 in Australia, 40% of all alcohol and other drug treatment episodes involved alcohol as the principal drug of concern, 24% involved cannabis, 7% involved heroin, 17% involved amphetamine, and 12% involved other drugs.

Source: Australian Institute of Health and Welfare (AIHW). (2015). Alcohol and Other Drug Treatment Services in Australia 2013-14.

Principal Drug of Concern: The main substance that leads an individual to seek treatment from an alcohol and drug treatment agency (as stated by the individual).

Treatment Episode: A period of contact between a client and a treatment provider. Only ‘closed’ treatment episodes are included in the data used here. An episode is closed if there is a change in the principal drug of concern, main treatment, or service delivery setting; if the treatment ends; or if the patient is imprisoned or dies.