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

https://johnathanrcpw248.wpsuo.com/do-ev-safety-features-change-legal-responsibility-if-i-am-on-medication

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