Objective To observe the curative effect and side effect ofdifferent dosage of flurbiprofen applied in refractory renal colic cases.Methods Two hundred refractory renal cohc cases were randomly divided into group A and group B,each group was 100 cases.Group A were apphed 100 mg flurbiprofen injection,group B were applied 50 mg flurbiprofen injection.Observed the time of the colic pain reheved,the curative effect and side effect Results The total effective rate of group A and group Bwere 99%(99/100)and 91%(911100)respectively,there was significant difference between two groups(P<0.05).In the time to relieve of group A and group B were(8.3±5.7)min and(13.2±9.1)min respectively,there Was significant difference between two groups(P<0.05).Analgesia continuous time of group A and group B were(19.3 ±3.2)h and(14.5 4±5.1)h respectively,there was no significant difference between two groups(P>0.05).And side effect was no significant difference between two groups.Conclusion The curative effect of 100mg flurbiprofen injection applied to the refractory renal colic cases is very outstanding,the time to relieve is very shod but side effect dose not increase.