Legal since 2018, medical cannabis isn't a first-line treatment for arthritis....

https://atomic-wiki.win/index.php/What_Does_%22Case-by-Case%22_Mean_for_Medical_Cannabis_and_Arthritis%3F

Legal since 2018, medical cannabis isn't a first-line treatment for arthritis. Access is usually through private clinics following a specialist assessment. If you’re exploring options, do chat with a qualified professional about your needs.