Sevoflurane with rapid anesthetic induction and emergence, hemodynamic stability, and nonirritating airway properties, has acquired widespread acceptance in children. However, sevoflurane has been reported to be associated with emergence agitation in children, with a reported incidence of up to 80%. In severe case, it cause injury to the child or to the surgical site and lead to the accidental removal of surgical dressings and intravenous catheters. In case of intense agitation with high risk of self-injury, pharmacologic intervention seems reasonable. Pharmacologic treatment of emergence agitation relies on the administration of IV sedative agents (IV midazolam 0.1 mg/kg12 or propofol 0.5 or 1 mg/kg) or opioid agents (IV fentanyl 1 or 2 mcg/kg). However, these treatments are empirical and were extrapolated from pharmacologic preventive studies performed at the end of surgery or from personal experience. To the investigators knowledge, there is no risk of recurrence of EA after a first episode. Consequently, EA is not per se a factor of increased duration of PACU (post-anaesthesia care unit ) stay, but sedative or opioid agents administered postoperatively to alleviate it might prolong this stay.