A comparison of the efficacy and safety of morphine and pethidine as analgesia for suspected renal colic in the emergency setting

Objectives-The aim of this study was to compare morphine and pethidine in p atients with clinically suspected renal colic with regard to analgesic effi cacy, patient satisfaction and side effects. Methods-Double blinded, randomised controlled trial. Results-There was no significant difference between morphine and pethidine with respect to any of the parameters measured. Conclusion-Because of the well known adverse effects that may be associated with pethidine use, the authors recommend that morphine should be the pref erred agent in suspected renal colic, when an opioid analgesic is to be use d.