Dexamethasone is an adrenocorticotropic hormone drug that is primarily used in the treatment of allergic and immune inflammatory diseases. It has excellent anti-inflammatory, anti-allergic, and immunosuppressive effects, and this product reduces and prevents the tissue response to inflammation, thereby reducing the manifestation of inflammation. The hormone inhibits the accumulation of inflammatory cells including macrophages and leukocytes, at the site of inflammation and inhibits phagocytosis, the release of lysosomal enzymes and the synthesis and release of inflammatory chemicals, mediators, which can reduce and prevent the tissue response to inflammation and thus reduce the manifestation of inflammation. Secondly, it has good immunosuppressive effects, including preventing and inhibiting the delayed allergic reaction of cell-mediated immune response, reducing the number of T lymphocytes, monocytes, and eosinophils, decreasing the binding ability of immunoglobulins to cell surface receptors, and inhibiting the synthesis and release of interleukins, thus decreasing the conversion of T lymphocytes like lymphoblasts, reducing the expansion of primary immune response, and can reduce the It decreases the number of immune complexes passing through the basement membrane and reduces the concentration of complement components and immunoglobulins.