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The Brian Lehrer Show

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The Brian Lehrer Show

Reefer, Managed: Can Cannabis Cause Psychosis?

In this Friday, March 22, 2019 photo, a marijuana plant is visible at Compassionate Care Foundation's medical marijuana dispensary in Egg Harbor Township, N.J.

Alex Berenson, former reporter for New York Times and the author of Tell Your Children: The Truth About Marijuana, Mental Illness, and Violence (Free Press, 2019), discusses his research into how cannabis may contribute to increased risks for mental illness and violence.