Preoperative Ondansetron Lozenge for Prevention of Postoperative Nausea and Vomiting in Pediatrics Undergoing Squint Surgeries

Inclusion Criteria: * Age from 4 to 15 years. * American Society of Anesthesiology (ASA) physical status I, II. * Pediatric patients undergoing squint surgeries. Exclusion Criteria: * Patients who had received any medication with antiemetic properties within 24 h before surgery. * Post-operative period (for reasons other than rescue antiemetic therapy). * Patients with known liver or renal disease. * Patients with a history of vomiting or retching within 24 h before surgery.