What's best over the counter pain medicine for severe joint pain?

I have steel rods in my legs from an accident years ago, and now that it's getting colder i'm in terrible pain. I take tylenol so often i'm afraid it will damage my liver. Has anyone had great success with severe joint pain with an OTC med? I can't take prescription painkillers (I was addicted to them for a long time, had to break the habit) and the prescription non narcotic meds are so expensive. Any help please?