Both cyclosporine and cyclophosphamide can be used to treat immune disorders with good clinical results. However, cyclosporine and cyclophosphamide have different chemical properties and treat different diseases. 1. Chemical properties (1) Cyclophosphamide is a compound formed by combining nitrogen mustard and phosphoramidonium group, which is a commonly used alkylating agent antitumor agent and cytotoxic immunosuppressant drug. (2) Cyclosporine is a cyclic polypeptide consisting of 11 amino acids, which is a potent immunosuppressant and acts on lymphocytes. 2. Treatment of diseases (1) Cyclophosphamide is the most commonly used alkylating agent antitumor drug. After entering the body, it is catalyzed by hepatic microsomal enzymes to interpret chloroethylphosphoramidonium, which has strong alkylating effect and cytotoxic effect on tumor cells, in addition to its immunosuppressive effect. (2) Cyclosporine mainly acts on organ transplantation, bone marrow transplantation and autoimmune diseases such as endogenous uveitis, rheumatoid arthritis, atopic dermatitis and psoriasis by regulating the function of lymphocytes. Although cyclophosphamide and cyclosporine can both be used in the treatment of immune diseases, their chemical properties and effects are different, and you must choose the right drug for your condition under the guidance of your doctor to ensure therapeutic effects.