As a student I have been told that oxygen metabolizes opiates and reduces the half life of opiates which I found quite interesting and that when an opiate OD (post naloxone) has recovered having a normal GCS and no signs of respiratory depression it is good practice to administer oxygen routinely regardless of oxygen saturations. This is against our guidelines so I did a bit of research. However, doing my own literature search I cannot find any explanation for this. Has anyone else been told this? Can anyone direct me to any evidence to support this?