pain
"I suffer from chronic neck/upper back pain due to spinal stenosis; spinal spondylosis; cervical neuralgia, etc. I've had multiple anterior and posterior fusions (c5-c/7) and revisions due to pseudoarthrosis (non-fusion). I've been on opioids for 7 years. 



Due to insurance coverage, my pain doc switched me from kadian (10mg 2x/day) to Opana ER (5mg 2x/day) and I immediately experienced a HUGE increase in pain. I also take Percocet (10/325) for breakthrough pain. I experienced minor withdrawal symptoms, which I thought was odd since I was actually taking slightly more morphine daily. My pain doc explained it was due to how the body metabolizes kadian. Opana did nothing for me."