RESUMO
One hundred sixty children were planed for elective tonsillectomy under general anaesthesia. They were divided into two groups. First group [group A: seventy five children] received injection of local analgesic lignocaine hydrochloride 1% in a dose of 1.5 mg/kg in the peritonsillar area. The second group [group B: eighty five children] was given O-5% Marcaine [Bupivacaine], in a dose of O.75 mg/kg around each tonsil after induction of anaesthesia. All patients were assessed on awakening, and after 30 minutes, one hour, two hours, four hours, six hours, 12 hours, using the pain scores 1-5 pain scores on awakening, and after 30 minutes, one hour, two hours, four hours, six hours were significantly lower in the second group, but in the first group pain scores were lower until two hours post operatively. Bupivacaine 0.5% as local infiltration in the peritonciller area has more prolonged effect and more potent as analgesic in children having tonsillectomy in comparison with lignocaine 1%