Comparing Blood Loss and Visualization After the Preoperative Use of Topical 0.05% Oxymetazoline Versus 1:1000 Epinephrine Prior to Endoscopic Sinus Surgery

Inclusion Criteria: * The inclusion criteria will be patients undergoing bilateral endoscopic sinus surgery (ESS) in which the same sinuses and procedures on both sides are the same for CRS with or without nasal polyposis. Exclusion Criteria: * pregnancy * known coagulopathy * an international normalized ratio greater than 1.3 * a partial thromboplastin time greater than 50 seconds * use of non-steroidal anti-inflammatory drugs in the last 10 days (2 or more doses) * use of any antiplatelet agents (eg, warfarin, clopidogrel, berlinta) * poorly controlled hypertension with a preoperative systolic blood pressure of 160mm Hg or greater or a diastolic blood pressure of 90mm Hg or greater * having any adverse reaction to topical epinephrine or oxymetazoline.