Cannabis use found in 82.8% of youth with early psychosis symptoms

This Ontario-based study examined cannabis use patterns among 116 youth aged 14-35 enrolled in an Early Psychosis Intervention (EPI) program between 2016 and 2019. The findings revealed a strikingly high prevalence of cannabis use, with 82.8% of participants reporting use—substantially higher than rates in the general youth population. The majority of users were male, with peak usage among individuals aged 18-25. Researchers also found a significant association between cannabis use and substance-induced psychosis (p < 0.001), and notably, cannabis users had lower levels of formal education compared to non-users.

The study underscores a critical public health concern: young people experiencing early psychosis symptoms are using cannabis at alarming rates, and this use appears closely linked to the development of substance-induced psychosis. This suggests a potential bidirectional relationship where cannabis use may trigger or worsen psychotic symptoms in vulnerable youth, or conversely, those experiencing emerging psychosis may turn to cannabis as a coping mechanism. The findings highlight the urgent need for screening, education, and integrated treatment within youth mental health services.

For individuals using cannabis or considering use, particularly those with any family or personal history of psychosis or mental health conditions, these findings carry important implications. The research emphasizes the importance of harm reduction strategies and early identification of problematic patterns. Mental health providers working with young people should implement routine cannabis screening and provide evidence-based counseling about the risks, especially given the heightened vulnerability of adolescents and young adults whose brains are still developing.