 The use of norepinephrine to prevent and treat hypotension during cesarean delivery CD is new and data in the literature are scarce. A recent randomised controlled trial by Ngan Kee et al compared continuous infusions of norepinephrine and phenylephrine to prevent hypotension during CD. They showed that norepinephrine was effective at maintaining blood pressure, with a greater cardiac output and heart rate compared to phenylephrine. However, the effective bolus dose of norepinephrine needed to prevent maternal hypotension was not determined, and since this is a relatively new arena, no dose-response studies are available in the literature either. Therefore, it would be logical to establish the effective bolus dose of norepinephrine TO PREVENT HYPOTENSION during elective CD. 