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

https://wakelet.com/wake/gbkZNUz3wYXB825yb9LdD

UK medical cannabis is typically vaporised, not smoked, to avoid harmful toxins from combustion. Vapour quality depends on device type—conduction heats directly, convection heats air—and temperature settings, influencing effects and efficiency