METHODS	Sixty children undergoing elective tonsillectomy or adenotonsillectomy were randomly allocated into three groups before tonsillectomy : peritonsillar infiltrations with 0.25 % levobupivacaine with 1:200,000 epinephrine ( group levobupivacaine , n = 20 ) , 0.25 % bupivacaine with 1:200,000 epinephrine ( group bupivacaine , n = 20 ) , and normal saline ( group saline , n = 20 ) were applied .\