4Nortcliffe SA,Shah J,Buggy DJ.Prevention of postoperative nausea and vomiting after spinal morphine for Caesarean section:comparison of cyclizine,dexamethasone and placebo[J].Br J Anaesth,2003,90(5):665-670
5Peter RK,Nicole B,Linda GF.Interactions between metoclopramide and morphine:enhanced antinociception and motor dysfunction in rats[J].Clin Exp Pharmacol Physiol,2007,34(1-2):106-112
6anonymtty. Practice guidelines for preoperative fasting and the use of pharmacologic agents to reduce the risk of pulmonary aspiration: application to healthy patients undergoing elective procedures:a report by the American Society of Anesthesiologists Task Force on Preoperative Fasting[J]. Anesthesiology, 1999,90:896-905.