The line graph shows that, between 2011–12 and 2012–13, amphetamines not further defined was the most common drug of concern among amphetamine-related treatment episodes for clients’ own drug use. In 2013–14, methamphetamine became the most common principal drug of concern within the amphetamines group. The proportion of methamphetamine-related episodes increased from 23.7% of amphetamine-related episodes in 2011–12 to 85.7% in 2020–21, while the proportion of episodes for amphetamines not further defined decreased from 50.1% to 7.8% over the same period.
The stacked horizontal bar chart shows the method of use for treatment episodes related to clients’ own use of methamphetamine, amphetamine, amphetamines not further defined, and other amphetamines in the Australian Capital Territory in 2020–21. Injecting was the most common method of use for methamphetamine, amphetamines not further defined and other amphetamines (ranging from 38.0% to 50.0% of episodes), while smoking was the most common method of use for amphetamine (42.7%).