I think you have the oxynorm and teh oxycodone the wrong way round. Oxynorm is the slow release version in tablet form which should last 12 hours. 10mg is a small dose which should be taken once every 12 hours. Oxycodone is liquid and quick acting for breakthrough pain. 5ml seems to be the normal starting dose and it’s supposed to last for 4 hours. I find it wears off after 3.
