“…13,35,37,39 One new RCT indicates that dixrazine is effective in the prophylaxis of postoperative nausea when compared with placebo (Category A3-B evidence), with equivocal findings reported for postoperative vomiting, headache, dizziness, and anxiety (Category A3-E evidence). 40 New literature is insufficient to further evaluate postoperative nausea and vomiting findings, as reported in the original Guidelines, for the following drugs: hydroxizine (Category A3-B evidence), perphenazine (Category A3-B evidence), and prochlorperazine (Category…”