Overview Hydromorphone vs Fentanyl in Children Undergoing Tonsillectomy Surgery Status: Recruiting Trial end date: 2022-01-31 Target enrollment: Participant gender: Summary A RCT to compare hydromorphone versus fentanyl for pain control following tonsillectomy or adenotonsillectomy surgery. Phase: Early Phase 1 Details Lead Sponsor: Washington University School of MedicineTreatments: FentanylHydromorphone