The Illicit Drug Reporting System (IDRS) is a national illicit drug monitoring system intended to identify emerging trends of local and national concern in illicit drug markets. The IDRS consists of annual interviews across all Australian jurisdictions with people who inject drugs (PWID), as well as analysis and examination of indicator data sources related to illicit drugs. The IDRS is designed to be sensitive to trends, providing data in a timely manner, rather than describing issues in detail. This report details findings from Melbourne, Victoria.