IRCT201610023051N11 IRCT 2016-12-09 Vice Chancellor for research of Qazvin University of Medical Sciences Evaluation of analgesic efficacy of lidocaine infusion in cesarean section Effect of intravenous lidocaine on postoperative analgesia in cesarean section under spinal anesthesia 2015-12-22 anticipated 80 Complete https://irct.ir/trial/3069 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Other design features: Random sampling is based on selection of colorful cards. N/A Cesarean section. Intervention 1: In control group, we injected bolus dose of Normal Saline intravenously instead of Lidocaine.(in same volume of Lidocaine based on milliliter) 15 min before spinal anesthesia. then maintenance dose of Normal saline continue one Hour from beginning of surgery. Intervention 2: In treatment group, 15 minutes before spinal anesthesia, 1.5 mg/kg of bolus Lidocaine 2% injected intravenously then, we infuse maintenance dose of IV Lidocaine 2%(1.5mg/kg/h) and Infusion of drug should be continue one Hour from beginning of surgery.