"Medical marijuana legalization was associated with 23% (p = 0.008) and 13% (p = 0.025) reductions in hospitalizations related to opioid dependence or abuse and OPR overdose, respectively" - Medical marijuana policies and hospitalizations related to marijuana and opioid pain reliever, Shi, Yuyan, Drug & Alcohol Dependence , Volume 173 , 144 - 150
Soros.