How long can you be on oxycontin. The doctor has been prescribing 40 mg 2x day for over 14 years and now the prescription drug company wont pay for it anymore and they are prescribing hydro-codone in its place and expect everything will be okay. I image there will still some withdrawl even with the small dose. I want to know if this was wrong of the doctor to keep prescribing this med to me.