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

https://louisvpqz495.theglensecret.com/what-s-the-difference-between-lighter-and-denser-vapour

UK prescribed medical cannabis is typically vaporised, not smoked, to avoid harmful toxins from combustion. Vaporisation methods—conduction or convection—and device temperature influence how cannabinoids are delivered and absorbed