A randomized, double-blind study comparing morphine with fentanyl in prehospital analgesia.

Study Objective: The aim of this study was to compare, by a randomized double-blind method, morphine (M) and fentanyl (F) in a prehospital setting.

Methods: Consecutive patients with severe, acute pain defined as a visual analog scale score (VASS) of 60/100 or higher were included. The M group received an initial intravenous M injection of 0.