 In the neonatal population, spironolactone is primarily used in addition with chlorothiazide for its potassium-sparing effects to reduce the need for electrolyte supplementation. However, evidence and current practice suggests the majority of patients still receive electrolyte supplementation. One study evaluated spironolactones effect on the need for electrolyte supplementation, but there is no published data with a primary outcome evaluating spironolactones effect on the quantity of electrolyte supplementation. We hypothesize there will be no difference in the amount of electrolyte supplementation between the two groups. 