Combination of two or more drugs in the same syringe among a national sample of people who regularly inject drugs in Australia, 2025

The Illicit Drug Reporting System (IDRS) has been conducted annually since 2000. The IDRS is a national drug monitoring system, designed to identify and track emerging trends of local and national concern in illicit drug use and markets. The IDRS forms part of the broader Drug Trends program. This bulletin examines the percentage of participants who combined two or more drugs in the same syringe in the month prior to interview, how many times the drugs were combined in the same syringe, the specific drugs combined and sociodemographic and health factors associated with participants who reported combining two or more drugs in the same syringe.