The effects of prophylactic bolus phenylephrine on hypotension during low-dose spinal anesthesia for cesarean section

•We evaluate the effects of three prophylactic bolus doses of phenylephrine on spinal hypotension.•Prophylactic bolus injection reduced the incidence of hypotension.•Prophylactic bolus of phenylephrine 1.5μg/kg may be an alternative method to reduce the incidence of hypotension.