IRCT2016112631095N1 IRCT 2017-01-30 Vice chancellor for research, Mazandaran University of Medical Sciences Clinical trial of comparison of intrathecal with intravenous Dexamethasone to reduce post operation complications after cesarean section Clinical trial of comparison of intrathecal with intravenous Dexamethasone to reduce post operation complications after cesarean section due to intrathecal Morphine 2016-10-22 anticipated 120 Complete https://irct.ir/trial/24526 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Supportive, Other design features: Using simple randomization and table of random numbers, patients are randomly divided into two intervention and control groups. Also, this study is double-blind and the patient and the nurse or anesthesiology resident who complete the checklist are unaware of the study groups. 2-3 Single delivery by caesarean section. Intervention 1: The intervention group receives 0.2 mg of intrathecal Morphine plus 8 mg of intrathecal Dexamethasone made by Iran Hormone Co. injected in L3-L4 or L4-L5 space. Intervention 2: The control group receives 0.2 mg of intrathecal Morphine in inter-vertebral space and 8 mg lntravenous Dexamethasone made by Iran Hormone Co. in addition to 2 cc intratechal distilled water in the same vertebral space.