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

https://www.pop-bookmarks.win/this-article-explains-how-prescribed-medical-cannabis-in-the-uk-is-consumed

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