valium and adderall will probably cancel out a little.
valium and percocet is a good combo for getting high, but i doubt you'll notice anything in any configuration if you only have 5mg of percocet to take
I took the adderal like 6 hours ago so it's probably worked it's way out of me for the most part but I'm not even close to tired and the valium usually knocks my ass right out pain or no pain