I had surgery yesterday. Normally after anesthesia I pop awake and am able to go home within an hour or so. But yesterday, I was extremely lightheaded and drowsy. My oxygen level kept dropping so they had to keep oxygen on me so that I could sleep. When I finally was able to go to the bathroom, I had a weak stream and was unable to empty my bladder and still am having some trouble today. One of the medicines I had intraoperatively was Dilaudid. I have never had it before and Morphine makes we lightheaded for a short period of time. Do you think this symptomotology is indicative of a reaction to the Dilaudid?