If you are afraid of mentioning the oxycontin to your doctor - I would do two things. One is mention to him your fears about
your liver. If you have been on on percocet for a long period of time, let him know you are afraid of that, and he could easily run some tests on your liver to check it out. Also - let him know that since the opana did not work for you - would you be able to switch to another time release medication?
I was on MS Contin for a while and noticed a small difference in my relief... it was mild, but as you know every bit helps. My new pain doctor actually switched me to a medication called Kadian which had made a very dramatic difference in my pain levels. There are other options out there, ask your doctor to explore those options with you. Also - I'm not sure what dosage of the Opana he put you on, but when I switched from 30mg of MS Contin (due to stomach surgery I was told I wasn't even absorbing 25% of the pain medication from it) to 50mg of the Kadian which is in a more gastric bypass friendly form - I actually was very sick to my stomach the first few days due to the HUGE difference in the amount of medication being absorbed. So if you are sensitive to medications he may need to start you off on a very small dosage and work you up.
Best of luck,
"When we come to the edge of the light we know, and are about to step off into the darkness of the unknown, of one thing we can be sure; either God will provide something solid to stand on... or we will be taught to fly.'"
"Cause when push comes to shove You taste what you're made of, You might bend, till you break Cause its all you can take; On your knees you look up Decide you've had enough, You get mad you get strong Wipe your hands shake it off, Then you Stand" From "Stand" by Rascal Flatts
Dx.: Polycystic Ovarian Syndrome, Ulcerlative Colitis, Chronic Inflammation of the Colon, Ruptured & Fused L4-L5-S1 w/pinched nerves, Degenerative Disc Disease, Chronic Costochondritis, Back Muscle Spasms, Asthma, Benign Tremmors (hands)