coxibs

I have been dx'd with neuropathic pain after an MRI and BONE SCAN and alot of testing.
Its dt,  DDD and osteoarthritis of the spine and hips.
I am taking 10mg oxycontin x2 daily...it does help with the lower back pain but NO help with the nerve pain.
I find that celebrex a cox-2 inhibitor helps alot....so therefor there must be alot of inflamation (inflammation) in the hips also cortisone injections do help but only for a short time and my pain doc tells me NOT to use the celebrex d/t heart stoke possible complications...
Does a vast increase in oxycontin work? and if so does it than become necessary to continually up the high dose or do you at a point stabilize?
thx for help