I have been on Hydrocodone for almost a year... 7.5 mg 3-4 times daily. Recently I was given a liver function test... and I was immediately taken off the drug and the physician upped my Ocycodone dosage to replace it. It has been 5 days since taking my Hydrocodone and I am feeling horrible. Headache, nausea, dizzyness, depressed... I was told I would not have any withdrawel because of the Oxycodone... Were they wrong?