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On Cannabis and Mental Health

On Cannabis and Mental Health

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What does the science actually say about cannabis and mental health? In this episode of In Conversation With, hosted by Dustin Graham (Deputy Editor, The Lancet Psychiatry), three leading researchers unpack a landmark collection of papers on cannabis and mental health published in the journal.

Dr. Jack Wilson (University of Sydney) breaks down a comprehensive meta-analysis of randomised controlled trials, revealing striking evidence gaps. Dr. Wayne Hall (University of Queensland) synthesises multiple forms of evidence, exploring cannabis's complex relationship with psychosis, anxiety, and depression. Professor Tom Freeman (University of Bath) zooms out to examine international cannabis policy, from decriminalisation to commercial legalisation, and what those shifts mean for psychiatric outcomes.

Together, they tackle the tension between public demand, commercial interests, and a rapidly evolving evidence base — and what policymakers and clinicians urgently need to know.

Read the full collection at thelancet.com

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