Analgesic Effect of Bupivacaine Plus Ketamine Versus Bupivacaine Alone in Transversalis Fascia Plane Block

Inclusion Criteria: * Patients aging ≥ 21 years to ≤ 45. * Patients undergoing cesarean section under spinal anesthesia. * American Society of Anesthesiologists (ASA) physical statusphysical status classes II. Exclusion Criteria: * Patient's refusal of procedure or participation in the study. * Coagulopathy and bleeding disorders. * Use of chronic pain medications. * Pregnancy-induced hypertension or diabetes. * Evidence of Local skin infections at site of injection. * Body mass index \>40kg/m2 * A history of relevant local anesthetic allergy.