Read on line that if you do oxycodone for a exteneded amount of time it will stay in system for a longer amount of time. So say you do 60 mg a day for 2 weeks and it normally takes 3-5 days for it to leave your system through the 3-4.5 hour half life process will this make for a longer period for the drugs to leave your system. What makes them stay in your system longer if done for longer period of times.