Cannabis use in Europe stabilizes after long-term growth.

• Cannabis remains the most widely used drug in Europe, with an estimated 31 million users in 2024 (10 million women and 21 million men).
• In the majority of countries with available data, use has stabilized in recent years following long-term increases. However, wastewater data reveal a continued gradual rise in detected levels of cannabis metabolite, which may also be related to increasing potency.
• Men consistently report higher use than women, though the gap varies across countries and has narrowed slightly over time.