 Study Objective The aim of the proposed study is to examine the effect of Q4 hour multidose IV acetaminophen on patients readiness for discharge. In doing so the investigators will also investigate the various factors that could potentially contribute to a patients readiness for discharge such as overall opioid consumption, time to rescue medication, incidence of postoperative nausea and vomiting, pain scores, and perioperative stress markers and their overall correlation with IV acetaminophen intake. 