This report analyzes trends in hospital stays and emergency room (ER) visits involving hallucinogen use in Canada over ten fiscal years (2014-15 to 2023-24). It also examines trends by age group, sex, type of harm, and province or territory. The rates of hallucinogen-related hospital stays and ER visits increased between 2014-15 and 2023-24, with the steepest increase coinciding with the first year of the COVID-19 pandemic (2020-21). Over the ten-year period, the rate of hospital stays rose by 39% and the rate of ER visits by 32%.