Overview PK Study of Sildenafil in Neonate Status: Completed Trial end date: 2016-10-01 Target enrollment: Participant gender: Summary The purpose of this study is to investigate the pharmacokinetics of sildenafil which is used as treatment of pulmonary hypertension in neonate and preterm infant. Phase: Phase 2 Details Lead Sponsor: Seoul National University HospitalCollaborator: Seoul National University Bundang HospitalTreatments: Sildenafil Citrate