There should be no detox if you are taking Oxycodone in place of Suboxone? I was on an extremely high dose and it has a very long half life so it could take 3 full weeks to fully be out of your system but realistically the Oxycodone will take its place on your opioid receptors and there should be zero withdrawals or anything. I am in the same boat with the Oxy not relieving my pain but Suboxone was a hell drug and I'm glad to have even some relief after getting off of it.