IRCT20211011052726N1 IRCT 2021-11-08 Mazandaran University of Medical Sciences The effect of intranasal ketamine on pain intensity after cesarean section The effect of intranasal ketamine on pain intensity after cesarean section 2020-10-22 anticipated 120 Complete https://irct.ir/trial/59319 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: Random allocation method (table of random numbers) is divided into two groups of intervention and control. Patients in the intervention group will be given 1 mg / kg of intramuscular ketamine. For the control group, normal saline will be administered intravenously as a placebo. 2 will be identified and sealed in envelopes that only the project nurse who prepares the medication will be aware of, and other staff, including the surgeon and anesthesiologist, will not be aware of the two groups, Blinding description: The syringes were similar in volume and shape, and the syringes were identified by the numbers 0 and 2. Was not given to patients as only The project nurse who prepared the drugs was aware of it, and other staff, including surgeons and anesthesiologists, were unaware of the two groups. 3 Severe postpartum pain. Intervention 1: Intervention group: One 4 mg tizanidine tablet (made by Galenus) is taken orally one hour before the operation and one tablet 24 hours later. Intervention 2: Control group: A dose of 0.4 mg of clonidine (manufactured by Galenus) is taken orally one hour before the operation and 24 hours after the operation. Intervention 3: Control group: One tablet of 0.4 mg placebo is taken orally one hour before the operation and 24 hours after the operation. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no more information