The propose of this study is to determine the effect of intravenous fentanyl prior the end of surgery on the incidence and severity of EA in pediatric patient.

Emergence agitation (EA) is a common self limiting problem after emerging from general anesthesia (GA) especially in pediatric patients. The incidence of EA in Thai population, the incidences of EA 43.2% in pediatric patients aged between 2-9 years. There have been many studies tried to reduce the incidence of EA in various ways such as Preoperative anxiety reduction method and medication. Premedication, Sedative drugs and narcotic drugs were used to reduce the incidence of EA.

Inclusion Criteria:

• Aged between 2-9 years
• IPD patient
• Receiving Chloral hydrate 50mg/kg (BW<20 kgs)or midazolam 0.1 mg /kg (BW>20 kgs)Per oral for premedication
• Scheduled for one kind of these surgeries; Otolaryngology, Ophthalmology, Urology, Orthopedic,General surgery, Plastic surgery and Cardiac catheterization.

Exclusion Criteria:

• ASA physical status IV-V
• History of drug allergy:thiopental, fentanyl cisatracurium, chloral hydrate and diazepam