This longitudinal cohort study examined the association of state-level medical and recreational cannabis laws with cannabis use disorder (CUD) and cannabis poisonings in the adult population with employer-sponsored health insurance. The study showed that from 2011 to 2021, states with legalized medical cannabis experienced 42.7% and 88.6% increases in CUD and cannabis poisoning, respectively, compared to states without legalized medical cannabis. States with legalized recreational cannabis experienced a 31.6% increase in cannabis poisoning compared to states without legalized recreational cannabis.

https://jamanetwork.com/journals/jamapsychiatry/article-abstract/2828352