IRCT201410319014N46 IRCT 2014-11-01 Vice-chancellor for Research the Technology, Hamadan University of Medical Sciences Effect of oral ketamine versus placebo on pain relief in patients with renal colic Effect of oral ketamine versus placebo on pain relief in patients with renal colic: a double blinded randomized clinical trial 2013-04-26 anticipated 44 Complete https://irct.ir/trial/9485 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Other design features: Randomization: The patients will be allocated to intervention and control groups through block randomization. For this purpose, patients will be divided into groups of four then each group will be allocated to intervention and control groups 2 by 2. Blinding: The patients in the intervention and control groups will receive drug with the same volume and color. Therefore, they will not aware of the intervention. In addition, the examiner will not aware of the type of intervention. Accordingly, the trial will be run as double blinded. 2 Renal colic. Intervention 1: Intramuscular injection of pethidine 1 mg/kg to maximum of 100 mg plus a single dose of 5 mg/kg oral ketamine 0.5%. Intervention 2: Intramuscular injection of pethidine 1 mg/kg to maximum of 100 mg plus a single dose of 0.1 mg/kg oral glucose 5%.