Medical cannabis has been legal since 2018 but isn't a first-line option....

https://wiki-net.win/index.php/How_Do_Lifestyle_Changes_Fit_with_Medical_Cannabis_for_Arthritis%3F

Medical cannabis has been legal since 2018 but isn't a first-line option. You’ll need a specialist assessment, usually via private clinics, once standard treatments have failed. Speak with a qualified professional to discuss your options.