Overview Esmolol vs. Labetalol in Endoscopic Sinus Surgery Status: Completed Trial end date: 2018-03-30 Target enrollment: Participant gender: Summary The purpose of this study is to compare esmolol and labetalol bleeding and intra-operative visibility scores in functional endoscopic sinus surgery. Phase: Phase 2 Details Lead Sponsor: The University of Texas Medical Branch, GalvestonTreatments: EsmololLabetalol