Does Legalizing Marijuana Affect Alcohol and Other Drug Use?

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Over the past several decades, there has been a substantial increase globally in policies legalizing medical and recreational cannabis, yet the impacts of this liberalization remain unclear. Milbank Quarterly author Sarah Windle of McGill University joined the Johns Hopkins Bloomberg School of Public Health’s Public Health on Call podcast, for the September 11, 2026, episode, Does Legalizing Marijuana Affect Alcohol and Other Drug Use? where she discussed her article, Impacts of Global Cannabis Policy Changes on Substance Use: A Systematic Review of Quasi-Experimental Studies.

In this episode, Windle explains what her team’s systematic review can tell us about whether legal cannabis is being used to substitute or to complement other substances.