UK medical cannabis is prescribed for vaporisation, not smoking, to avoid...

https://www.thelondoneconomic.com/lifestyle/health/how-medical-cannabis-vaping-works-temperature-devices-and-the-economics-behind-it-409054/

UK medical cannabis is prescribed for vaporisation, not smoking, to avoid harmful combustion byproducts. Device type—conduction or convection—and temperature settings impact effectiveness and user experience