Preventing Hypotension in Parturients With an Elevated Body Mass Index (BMI)

Inclusion Criteria: * English speaking * ASA Physical Status I-II * Non-laboring women * Single gestations ≥ 36 weeks * Obese women (Body Mass Index 35 - 55 kg/m2) * Non-emergent CD under spinal anesthesia Exclusion Criteria: * Height \< 5'0" * Antiemetic drug use in the 24 hours prior to CD * Allergy to phenylephrine, or any other standardized medication * Hypertensive disease of pregnancy (i.e. mild \& severe preeclampsia) * Chronic hypertension receiving antihypertensive treatment * Severe Cardiac disease in pregnancy with marked functional limitations * Patients on Monoamine Oxidase Inhibitors or Tricyclic Antidepressants * Subject enrollment in another study involving a study medication within 30 days of CD * Any other physical or psychiatric condition which may impair their ability to cooperate with study data collection