Hello, I had a total knee replacement on July 8, 2014. I was prescribed oxycodone ( 5 mg) . . 1 - 3 tablets every 4- 6 hours. I am trying to taper off, and have noticed that I have isomnia, am agitated have anxiety. Are these withdrawl symptoms? If so, what should I do? I have been trying to take just 1 ( 5 mg) tablet every 6 hours, but the knee pain, and other symptoms ( above ) are of a concern. What can I do to minimize the tapering off effects? Thank you