Inhaled cannabis is the most common form in which patients are using it. This is very damaging to the respiratory system. CPSA should look at longer-term harm as they set the policies. All practitioners planning to prescribe cannabis should be required to take a course on the effects to the respiratory system. Carcinogens abound (not any safer than cigarettes). Vaped forms have even more harmful concerns. As a Respirologist, I do believe that inhaled cannabis use (for medical or other) should be banned from any CPSA licensed practitioner.