The Ecstasy and Related Drug Reporting System (EDRS) is a national drug monitoring system intended to identify emerging trends of local and national concern in illicit drug markets, and form part of Drug Trends.

Ketamine use has continued to rise, and previous research have linked several harms with frequent use. This paper described trends in ketamine use among sentinel cross-sectional samples of Australians who regularly use ecstasy and other illicit stimulants from 2009-2019, along with the characteristics of consumers.