Firstly, I'm sorry you have excruciating pain with this but secondly, I'm amazed that you have an actual diagnosis!
All I'm told is that it's osteoarthritis, to be expected when you're older and no, don't take anti-inflammatories.
I think these are the joints where the nerves can become trapped, leading to pain and possibly sciatica.
Do you think physiotherapy to strengthen the muscles around that area would be beneficial? If so, can you self-refer in your area?
I've just been to the physio this morning and have been given some chair exercises which strengthen the lower back. 🤞 They will help.