Medical marijuana is touted as a pain reliever, but in U.S. states where it’s legal, prescriptions for opioid or non-opioid painkillers haven’t decreased, a new study finds. The study, published in the Annals of Internal Medicine, looked at the use of medical marijuana 3 years after the law was implemented in 12 states, comparing them with 17 states where medical marijuana was illegal. Investigators noted that several structural barriers may account, in part, for the results including lack of insurance coverage, lack of access to approved prescribers, or provider reluctance to prescribe cannabis.  Read the article here.