Ultracet and exhaustion

Has anyone out experienced itching, not so much that you scratch yourself raw, but you need to touch any spot that has the begining of an itch. One touch usually stops the itch but the feeling comes back someplace else. I only took one pill and have not taken another. As long as I was awake the urge to scratch kept me on the move, exhaustion put me to sleep. Maybe my pain was not so great as to need this drug. Two days prior to taking the drug I was in great pain (lower back) but, by the time that I could make it to the Doctors Office I was feeling better.