https://www.motherjones.com/politics/2018/02/jeff-sessions-says-marijuana-fuels-the-opioid-epidemic-study-after-study-finds-the-opposite/
"The latest study, published by the RAND Corporation this week, found that states that allowed liberal access to marijuana through legally protected dispensaries saw reduced deaths from opioid overdoses. States that legalized the drug but didn’t allow dispensaries didn’t see the same pattern."