Today I took 45 mg of oxycodone and have a drug test coming up in 7 days. From my math of the half life it should be out in time for the test. But now I am reading that it is metabolized in to oxymorphone which has a 7-9 hour half life. How long does it take for it to be metabolized into oxymorphone and will it show up in my drug test that is 7 days away? Also read only 15% of the oxycodone dose is metabolized into oxymorphone.