Overview Mepolizumab in Nasal Polyposis Status: Completed Trial end date: 2014-12-05 Target enrollment: Participant gender: Summary A two-part, randomised, double-blind, placebo controlled, multi-centre study to investigate the use of mepolizumab (SB-240563) in reducing the need for surgery in subjects with severe bilateral nasal polyposis. Phase: Phase 2 Details Lead Sponsor: GlaxoSmithKline