Preoperative Ondansetron Lozenge for Prevention of Post-Spinal Shivering in Caesarean Section

Spinal anesthesia (SA) is preferred for cesarean section (CS) compared with general anesthesia(GA) because of several advantages, including prevention of the potential risk of GA-related neurotoxicity. Post-spinal shivering (PSS) could be a provocative factor for postoperative pain and its appropriate treatment prevents non-thermoregulatory tremors. Shivering also causes aggravating postoperative pain by stretching of sutures. Ondansetron is a selective antagonist for receptor 5-hydroxytryptamine 3 and is very effective in the prevention and treatment of shivering intra- and post-operation. Ondansetron can affect the body temperature and shivering in rats since the balance of nor-epinephrine and 5-hydroxytryptamine (5-HT) in the preoptic-anterior hypothalamus controls the temperature set point.