Dexamethasone
"They put 6 shots in my back, 3 on each side.  No relief, and then 9 days later relief.  It took the pain from my lower back and legs away.  I had pain in my neck where I have a plate.  It also took that pain away.  It also took my wrist pain away.  For reasons unknown to me I do now have upper middle of the back pain.  It blocks the chemical the makes things inflame, so therefore they cannot inflame.  
My neighbor gets back shots every 3 months and he is happy with his results."