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

https://victoriasuniquedigest.talesignal.com/posts/what-s-the-best-way-to-ask-about-total-annual-cost-without-sounding-awkward

UK medical cannabis is typically vaporised, not smoked, to avoid harmful toxins. Vaporiser temperature and device type—conduction vs convection—impact how effectively cannabinoids are delivered