Sandummun Neoral 25mg Capsule contains the active ingredient Cyclosporine. It is a medication that belongs to a class of drugs known as immunosuppressants. It is primarily used to prevent organ rejection in patients who have undergone organ transplantation, such as kidney, liver, or heart transplants. It is used with other medicines to prevent the rejection of the new organ by the body's immune system. After solid organ transplantation, the body generates an aggressive immune response because it recognizes the transplanted organ's antigens as foreign antigens. Thus, treatment with immunosuppressive agents is necessary after an organ transplant to prevent organ rejection.