Driving with prescribed medical cannabis involves more than just holding a...

https://victor-wiki.win/index.php/I_Only_Use_Cannabis_Oil_at_Night:_Can_I_Drive_the_Next_Morning%3F

Driving with prescribed medical cannabis involves more than just holding a prescription. While a medical defence exists for the 2µg/L THC limit, it isn't a free pass. Drivers must notify the DVLA and remain fully fit to operate their vehicle