caudal epidural block is a technique used as an adjuvant to general anesthesia for postoperative analgesia in pediatric patients,especially those with infraumbilical, perineal and lower extremity surgery , because it reduces the need for perioperative and postoperative analgesia, reduces the need for general anesthesia, accelerates the awakening, suppresses the surgical neurohumoral stress response and can be performed easily The objective of the current study is to determine the efficacy and safety of prophylactic intravenous administration of combination of 0.1mg/kg of dexamethasone plus 4mg of ondansetron immediately before establishment of caudal block for prevention of Nausea\&vomiting and Shivering in pediatric patients undergoing infra umbilical surgeries
Age from 2 to 12 years old.
Patients with stable vital signs.
Patients with normal laboratory investigations.
Patients undergoing Caudal anaesthesia for infraumbilical surgeries
Patient's parental refusal.
Age < 2 or > 12 years.
Contraindications to Caudal anaesthesia (Coagulopathy, increased intracranial pressure, or local skin infection ,pilonidal cyst and congenital anomalies of lower spine because of unclear or impalpable anatomy
Patients with cardiac morbidities.