UK medical cannabis is taken by vaporisation rather than smoking to avoid...

https://deansbestchat.hexaforgey.com/posts/what-s-the-plain-english-reason-smoking-will-never-be-the-licensed-route-in-the-uk

UK medical cannabis is taken by vaporisation rather than smoking to avoid harmful toxins. Temperature control and device type—conduction vs convection—impact cannabinoid delivery and effect