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

https://wiki-cable.win/index.php/Do_I_Buy_the_Vaporiser_Myself_or_Is_It_Prescribed%3F

UK medical cannabis is prescribed to be vaporised, not smoked, to avoid harmful toxins. Vapour quality depends on device type—conduction or convection—and temperature settings, affecting how active ingredients are released