UK prescribed medical cannabis is vaporised rather than smoked to avoid harmful...

https://angelowlnv711.yousher.com/what-makes-the-medicine-the-biggest-recurring-cost-in-medical-cannabis

UK prescribed medical cannabis is vaporised rather than smoked to avoid harmful toxins. The effectiveness varies with device type—conduction heats directly, convection uses hot air—and temperature controls dosage and flavour