Inclusion Criteria:  Age: 21-38 years old. Mild and moderate preeclampsia parturient. American Society of AnesthesiologistPhysical status II. Body Mass Index (BMI) (25-35kg/m²). Type of operations: elective cesarean section under spinal anesthesia. Written informed consent from the parturient.  Exclusion Criteria:  Altered mental state. Women with known history of allergy to study drugs. Women with uncontrolled diabetes mellitus, bleeding, coagulation disorders, advanced hepatic, renal, cardiovascular, respiratory disease and neuropsychiatric disorders. Patients receiving anticonvulsants or antidepressants. Sever preeclampsia, intrauterine growth restriction or fetal compromise.