Comparing the analgesic efficacy of morphine plus ketamine versus morphine plus placebo in patients with acute renal colic: A double-blinded randomized controlled trial.

Objectives: Renal colic (RC) is a common cause for emergency department visits. This study was conducted to compare the analgesic efficacy of morphine plus ketamine (MK) versus morphine plus placebo (MP) in patients with acute renal colic.

Method: Using a single center, double-blind, two-arm, parallel-group, randomized controlled trial, 200 patients were equally and randomly divided to receive 0.