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

https://sophiassuperbperspectives.iamarrows.com/what-should-i-expect-the-pharmacy-to-do-when-dispensing-an-unlicensed-medicine

UK prescribed medical cannabis is typically vaporised, not smoked, to avoid harmful combustion byproducts. Vaporiser type—conduction or convection—and temperature settings influence how the cannabis is absorbed and experienced