There are consequences to abusing your prescription in that, the doctor may cut you off for not taking as prescribed (thinking that you were selling them which is one of the new angle's docs are looking for). I found info saying that marijuana shows up in 1-3 everything else 2+ I guess if those are your time parameters, you're in for a wait to find out.. if you pass or fail.
If you dont need them why not tell them you dont?
Why do you need to show percocet? Pain management?
2 hours after last dose rather