Understanding substance use trends is vital to quickly respond to and reduce associated risks. This study contributes to such knowledge by qualitatively exploring drug use trends across 20 European cities between July 2024 and July 2025. It uses focus group discussions conducted with key informants who are directly or indirectly engaged
in the dynamics of local drug markets, including people who use drugs. This approach permits the identification of emerging developments that may not yet appear in quantitative datasets, while providing rapid insights into changes in local drug
landscapes.
