Prescribed cannabis users face a legal tightrope. A medical defence exists for...

https://edwinxrml916.lucialpiazzale.com/is-it-illegal-to-drive-if-my-medication-makes-me-drowsy-a-guide-to-staying-on-the-right-side-of-the-law

Prescribed cannabis users face a legal tightrope. A medical defence exists for the 2μg/L THC limit, but it's not a free pass. You must notify the DVLA; being legal doesn't replace your responsibility to drive safely. If you’re impaired, you’re liable.