UK-prescribed medical cannabis is typically vaporised, not smoked, to avoid...

https://augustsniceblogs.timeforchangecounselling.com/does-my-vaporiser-count-as-part-of-my-medical-cannabis-treatment

UK-prescribed medical cannabis is typically vaporised, not smoked, to avoid harmful toxins from combustion. Vaporiser type—conduction or convection—and temperature settings influence effectiveness and user experience