Prescribed cannabis is no immunity pass. While a medical defence exists, you...

https://golf-wiki.win/index.php/If_I_Get_Pulled_Over,_What_Do_I_Say_About_My_Prescription%3F_A_Guide_for_Medical_Cannabis_Patients

Prescribed cannabis is no immunity pass. While a medical defence exists, you must stay under the 2µg/L THC limit and meet DVLA standards. Legality never overrides responsibility; if impaired, you are liable, regardless of your prescription