"suffering from a back injury from 2001. over a couple of years nerve damage on left side started. surgery done l4 and l3 was removed and replaced with an artificial substance. cage over spine with 4 screws. limited back movement.i&#039;m in constant pain always. last meds on was oxycontin and percocet for break through. put on zohydro er, 30 mg. it&#039;s not working.its only been about 3weeks.asking doc to put me back on previous meds. it was job related injury."