僅用于工業應用或科學研究，不可用于人類或動物的臨床診斷或治療，非藥用. Mepolizumab （SB 240563） is a humanized monoclonal antibody that binds to and neutralizes interleukin-5 （IL-5）, the major cytokine involved in eosinophil proliferation, activation, and survival. Mepolizumab can be used for the research of eosinophilic granulomatosis with polyangiitis （EGPA） and severe eosinophilic asthma.