The line graph shows that, from 2011–12 to 2013–14, amphetamine and ‘amphetamines not further defined’ were the most common drugs of concern among amphetamine-related treatment episodes for clients’ own drug use. In 2014–15, methamphetamine became the most common drug of concern. The proportion of episodes for methamphetamine increased from 12.3% in 2011–12 to 92.5% in 2020–21.
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 Western Australia in 2020–21. Injecting was the most common method of use for amphetamine and methamphetamine (56.1% and 56.3% of episodes, respectively), while ingesting was the most common method of use for other amphetamines (100.0% of episodes).