Don't smoke it. Use it as cannabis oil and juice raw cannabis.
The study used UBC data from more than 400 medical cannabis users collected between 2011 and 2012. It found that 87 per cent were likely to use marijuana as a substitute for a different substance, especially prescription drugs. (Medical marijuana is often used for pain relief.)
https://www.civilized.life/articles/mental-health/
According to researchers, the “most comprehensive” report ever indicates that people with drug addictions, especially those hooked on opioids or alcohol, could use cannabis as a “reverse stepping stone” away from more harmful substances. Their findings were recently published in the journal Clinical Psychology Review.
http://www.medicalnewstoday.com/articles/314159.php
"Research suggests that people may be using cannabis as an exit drug to reduce the use of substances that are potentially more harmful, such as opioid pain medication," Walsh explains.