This guy I know gets 80mg tablets prescribed 90 at a time in order to last him the full month (bad car accident). But it all depends on the doctor and what you're getting treated for, etc.
-Steve
They are supposed to be prescribed 1 tab every 12 hours, which makes for 60 a month.. because they only last about 8 hours a lot of doctors are prescribing 90 at a time.. I only get 60 a month but I also get OxyIR for break through (as most OxyContin patients do)