Suplatast Tosilate is a specific Th2 cell inhibitor that has been widely used in the treatment of various allergic and inflammatory diseases such as asthma and atopic dermatitis, with good efficacy and high safety. Research has shown that Suplatast Tosilate can inhibit the production and function of Th2 cells and Th2-type cytokines such as IL-4 by regulating GATA3 and chloride channels, thereby exerting a therapeutic effect on allergic diseases. Additionally, Suplatast Tosilate also has regulatory effects on dendritic cells, monocytes, eosinophils, and neurons. Therefore, Suplatast Tosilate has become a focus of attention in the research field of treating Th2 cell-mediated allergic inflammatory diseases.