A written informed consent will be taken from the guardian of children.Patients will be assigned randomly to three groups (30 subjects each) to be anesthetized. The study drug will be delivered in opaque bags labeled study drug and 90 patients will be allocated in three groups (of 30 patients each) to receive the study drug at the end of surgery; a single dose of 0.5 µ/kg IV dexmedetomidine (Group D) or a single dose of 0.1 mg/kg IV nalbuphine (Group N) or same volume of saline placebo (Group C).
The hypothesis of this study is to investigate and compare the efficacy between the administrations of single intravenous (IV) dose of dexmedetomidine versus nalbuphine in preventing immediate postoperative agitation in children undergoing cleft palate repair.