i presume what you are taking is percocet or the generic there of.....ea tab is 5mg of oxycodone and 325 of tylenol......taking this 2 tabs q 4 hours is putting you at the top end of acceptable tylenol intake and that is only for short term use...2-3 days at a time.....can result in liver damage...
would be much easier to get the oxy separately and throw some tylenol in with some doses but not all.....perhaps your surgeon to be would be willing to prescibe? if you are taking the high end, oxycontin 10/10/10 might do or 10/10/20.....good luck