Years , pick up tablets once a month at chemist, blood test when they remember, phone call to say carry on taking the tablets 

I take maritime pine bark extract clinical tests showed it was better than any prescribed pain killer for Arthritis!A bit off topic but.......
Just a thought, get proper medical.avice etc ......
I have had Arthritis in my hands for decades, especially my thumbs.
Some years ago a lady friend suggested that I try Evening Primrose Oil and it has made a huge difference!
I get less pain now that 40 plus years ago.
I take 2 large capsules a day and it takes a couple of weeks to "kick in" but my hands are now virtually pain free.
If I run out or stop for any reason than I can feel the difference after a few days.
If you are medically OK to take these then why not try it?
Background story.
The lady wad advised to try Evening Primrose Oil for symptoms of the menopause and found that it had a dramatic effect on her hands - hence the suggestion that I try it.
GP= Drug dealer in my opinion!
100% drug dealers for big pharmaGP= Drug dealer in my opinion!

That sort of interaction probably brightens her day a little aswellOur local GP service is amazing - phone up and the staff know you by first names and ask what time you want to come in.
The doctor then usually has a chat as well - one youngish Canadian lady GP is properly funny and has me laughing every time.