What is the difference between oxycodone or Percocet and Roxicodone? I feel both are the same, except for the fact that Roxi does not contain aspirin. The reason I am asking this is because I have been having gnawing stomach aches for the past 2 months and I have been prescribed Percocet/oxycodone. Initially, I was on hydrocodone till my doc decided to change it to oxy 2 weeks back and I have been stomach sick since then. Does anyone feel I should ask my doc to put me on Roxicodone instead? Is it going to make any difference? I have permanent nerve damage, a torn disc and spondylosis and terrible fybro. Appreciate your suggestions!!!