What happened when cannabis was legalised in the US?

While cannabis remains illegal at the federal level, almost half of the states of the US have now legalised it for recreational use. But what effect has this had on health, and how are researchers monitoring the situation?

Niall Boyce and Mariam Sabin from the Lancet chat with Professor Deborah Hasin, Professor of Clinical Epidemiology at Columbia University.

The Lancet Voice is part of the Lancet Group podcast offering.  Editorial team: Niall Boyce, Miriam Sabin, Jessamy Bagenal, Richard Horton, and Gavin Cleaver Podcast editing: Matteo Simonetti Visit https://www.thelancet.com/multimedia to learn more about our multimedia offering.  Find the best science for better lives at thelancet.comFollow us today at...https://thelancet.bsky.social/https://instagram.com/thelancetgrouphttps://facebook.com/thelancetmedicaljournalhttps://linkedIn.com/company/the-lancethttps://youtube.com/thelancettv