"i suffer from chronic neck/upper back pain due to spinal stenosis; spinal spondylosis; cervical neuralgia, etc. i&#039;ve had multiple anterior and posterior fusions (c5-c/7) and revisions due to pseudoarthrosis (non-fusion). i&#039;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."