Percocet is oxycodone with apap(tylenol/acetominophen), oxycontin is extended release oxycodone (crushing or smoking is making it instant release) and roxycodone is a SLANG name for instant releasr oxycodone (10mg, 15mg, 20mg, 30mg etc). No bottle will EVER say "roxycodone", so you're wrong with that. But you are right that the active ingredient is oxycodone in ALL those.