Diclofenac
back pain
"I have degenerative disc disease and foraminal stenosis and am in chronic pain. I've tried all sorts of pain relievers from the weakest all the way up to fentanyl. 
The other day I was in incredible pain and someone gave me a 75mg diclofenac. I researched it and reviews were very positive, so I tried it. Amazingly, it worked great and very fast. "