I have diclofenac for my arthritis, I've been on it for years too. I combine the diclofenac with paracetamol and codeine which helps me conserably. I've been prescribed naproxen in the past but find the diclofenac better, but you must take it after food as it can upset the stomach, and you can't take it at the same time as ibuprofen as they belong to the same family of drugs. If you feel your pain isn't being adressed by the diclofenac I think you ought to go back to your doctor and see if there is another pain killer he can offer you