The Risks of Combining Alcohol and Cannabis in Young Adults

A recent long-term study conducted by York University's Department of Psychology has revealed that young adults who experience heightened stress, anxiety, or depression are more inclined to mix binge drinking with cannabis use. This combination often aims to intensify the euphoric effects of both substances but is associated with increased adverse life outcomes. The research emphasizes the rising trend of cannabis use among young adults after its legalization in Canada, highlighting the importance of understanding the motives behind co-using these substances and their potential consequences.

Research lead Jeffrey Wardell, an associate professor at York University's Faculty of Health and director of the Behavioral Alcohol and Cannabis Research Lab, notes that brain development extends into the twenties, and dependencies on alcohol and cannabis are particularly prevalent in this age group. While occasional simultaneous use might not pose serious concerns, the study underscores the heightened risks involved with frequent co-use, especially during vulnerable periods marked by stress or emotional distress.

The study involved 151 young adults aged 19 to 25 from Ontario who had prior experience with both alcohol and cannabis. Participants documented their daily consumption and related negative consequences over three separate 21-day intervals spaced six months apart. They also reported levels of stress, anxiety, depression, and their motivations for combining these substances. Findings demonstrated a clear link between mental health symptoms and the motivation to co-use alcohol and cannabis.

Participants often reported that during stressful or anxious moments, they believed using both substances would help them feel better or more relaxed. However, Wardell warns that while short-term relief is possible, long-term consequences often involve worsening mental health and other negative life impacts. Alternative coping methods such as breathing exercises, physical activity, social support, and professional help are encouraged.

Early intervention is crucial, as young adulthood remains a critical period for developing substance use patterns. Providing feedback and education can help prevent the escalation of harmful behaviors. The research underscores the need for increased awareness about the potential dangers of combining alcohol and cannabis, especially during periods of emotional vulnerability.

Source: https://medicalxpress.com/news/2025-09-combined-alcohol-cannabis-linked-adverse.html