Cindy:
Oxycodone is the generic ingredient in Percocet. The only thing you are missing is the tylenol. I am on 10mg Percocet (up to 6 per day), and mine contain 325mg Tylenol per tablet. There are other 10mg Percocets that have up to 650mg Tylenol per tablet.
Most docs will tell you that the reason they put you on straight oxycodone is to protect you against liver damage.
Have you been on other narcotic pain meds that contained Tylenol for extended periods of time? If you have, that could be the reason why the doc has you on straight Oxycodone.
Hope this helps.
Kim