"i have herniated disc and arachnoiditis, degenerative arthritis in upper spine and left hip. i have had three meniscus repairs and the replacement of my left knee. i need the right knee replaced when possible. i have also had a disc fused in my neck. i am on nucynta er 50mg twice a day, percocet 7.5mg 5 times daily, plus soma. i am still suffering a lot of pain in the 8 - 9 range most of the time. i get very little sleep because of the pain and burning. the nucynta er helps but need something better then the percocet...i hate the feeling it causes. i am waiting (jumping through hoops) for the insurance to approve a nerve stimulator implant and praying it will give me at least 50% relief. i have not tried the nucynta ir, will ask dr."