I use...nothing, usually. For the last year Tylenol has been the "recommended" pain reliever b/c the others can inhibit bone growth. Unfortunately, it doesn't really do much for pain. I take Excedrin for migraines when absolutely necessary and will occasionally take tylenol PM if I'm in too much pain to sleep, but there isn't a pill that really has helped my back pain (not even percocet).

For me, laying over a pilates ball on my stomach and then my back is the best thing I can do to let it relax and decompress. Once that feels good, I have a little while before it starts to bother me again. Obviously I'm having different issues than you are but I wonder if there is something similar that might help you, even temporarily.