I can't remember which of the websites I was reading, either Arthritis Care, Research or UK but there was a section on complementary treatments. A pill of arthritis sufferers had brought capsaicin ointment out at number one for effectiveness against pain. At number two came a supplement called SAM-e, which also came out better regarding improved flexibilty. I am now taking SAM-e which is safely available via Amazon and I can report a definite improvement but you have to take for a month. I am almost at the month. Of course it is expensive if you have to take forever. Read up on it.
I might also ask gp if I can have another go at prescription-strength capsaicin, which I found tremendously effective but it aggravated my skin, despite using E45 first, as recommended.