Evaluating the analgesic effect of ketorolac combined with paracetamol in unilateral cleft lip surgery in children were conducted on 60 patients from 6 to 12 months old who had unilateral cleft lip surgery at the National Hospital of Odonto-Stomatology Ha Noi from 6 - 2020 to 10 - 2020; Patients were randomly divided into 2 groups according to even and odd surgery days.