The product is an immunosuppressant.It is mainly used to prevent rejection following allogeneic organ transplantation or bone marrow transplantation and in the prophylaxis of graft-versus-host disease(GVHD). It is also used in the treatment of systemic lupus erythematosus(SLE),rheumatoid arthritis,atopic dermatitis and other autoimmune diseases.There are some recent HIV injection researches and studies with the treatment of CsA in these years.