What's similar to oxycontin,besides fentanyl patches?

I'm 29 had 3 back surgeries and numerous other procedures with no relief,also have spondylosis,degenerative disk disease,rheumatoid arthritis and some other things.I have used duragesic(fentanyl)patches in the past.I was on oxycontin 20mg,then 40,and now on 80mg. Oxycontin makes me sleepy.I was wondering what other meds are similar to fentanyl or oxycontin that are in similar category and are as strong that i can talk to my dr about?Thank you for all comments.