Five Years of Legal Cannabis: What Have We Learned?

Recorded on Thursday, September 14, 2023 

HRI Talks – Five Years of Legal Cannabis: What Have We Learned?

This HRI Talk shed light on how the change in cannabis’s legal status has affected the landscape of mental health and substance use research and treatment. Our panel of experts explored various facets of cannabis legalization, focusing on the public health and research dimensions of this transformative policy change. Viewers can expect an informed and data-driven conversation that assesses the benefits, challenges, and unforeseen consequences that have emerged since legalization.


  • Discuss what have we learned since recreational cannabis was legalized in 2018.
  • Explore how legalization has impacted the mental health and substance use health of people in Canada.
  • Learn how legal recreational cannabis has affected cannabis use research and treatment.



Dr. Sidney Kennedy
Executive Director of HRI


Dr. James MacKillop
HRI Senior Scientist, Tier 1 Canada Research Chair in Translational Addiction Research, Professor of Psychiatry and Behavioural Neurosciences at McMaster University

Dr. Alexander Caudarella
Family physician and Chief Executive Officer at Canadian Centre on Substance Use and Addiction

Michael DeVillaer
Professor in the Department of Psychiatry and Behavioral Neurosciences at McMaster University. Author of the upcoming book, “Buzz Kill: The Corporatization of Cannabis”.

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*HRI Talks are open to everyone. We aim to create a welcoming and inclusive space for all attendees to learn and engage. Disruptive or inappropriate activity, including (but not limited to) bullying or hate speech, will result in removal from the webinar.

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