bptoo; No, I don`t know much about the Oxy but I do know about Fentynal patches, they are 3 day patches and worked very well for me. I have chronic back pain from nerves that were messed up in an accident. There expensive, here [in Madison,Wi] there $20.00 per patch but well worth it. I don`t use one every three days though. If you have Ins. to cover them it would be nice?? greg

G.B./calli