Can medical marijuana curb the heroin epidemic?

Can cannabis curb heroin and opioid addiction? Some studies suggest marijuana can be used as a substitute for treating opioid addicts, which has helped reduce opioid overdoses and hard drug use in legalized states. 

http://theconversation.com/can-medical-marijuana-curb-the-heroin-epidemic-35287?utm_content=bufferb70e8&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer