Welcome to the forum. We aren't allowed to give medical advice, but I'd say if you go to your doctor, he/she may have some helpful suggestions to get you off the medication. From my experience, a medically supervised withdrawal is much better than trying to go it alone. Just my opinion, as someone who works in the medical field and is going through it herself.
Also, to give you some hope.....
In December my liver enzymes were elevated (pretty high) and I just had labs re-done, and my enzymes are back no normal!! That was just from 6 weeks of not drinking or using! I was taking more pills than you, and for a longer time, but I was also drinking, which didn't help those liver enzymes at all! However, since 1/1/06, with my doctors supervision, I've been able to stay off the oxycodone & alcohol!!! I also go to meetings, which help SOOOO much!! I can't stress it enough...meetings are the key to success!!! This forum is full of good information, keep coming back.......it works!
-Elaine-