Ondansetron Prior Spinal Anaesthesia

Since Ondansetron is commonly used during cesarean deliveries to treat nausea and vomiting, this study will observe the correlation between ondansetron administration and effect on hemodynamics in order to confirm that the use of Ondansetron can reduce incidence of hypotension and bradycardia associated with spinal in cesarean section, and to identify the optimal timing and dose for administration.