Hi: I have just completed my 5th major shoulder / knee surgery and have developed very high tolerance to pain meds. Pain Dr switching me from ~330mg per day of oxycodone and oxycontin to 100 mcg fentanyl patch plus extra oxycodone to manage pain and withdrawal. Pain is already getting a LOT better and he will start reducing the fentanyl patch very slow, over 6-12 months. Does this all seem reasonable? Reason for the switch is my liver is over processing the oxycodone and he wants some meds to by pass first metabolism in the liver and he thinks it will be too hard to ween me form the oxycodone. Any thoughts greatly appreciated!! FYI, I work full time and am not disabled in any way, I simply had to have my terrible shoulders and knees fixed!