Neoral is a brand name for the immunosuppressant drug cyclosporine, specifically formulated for enhanced absorption and bioavailability. It is primarily used to prevent organ rejection in patients who have undergone kidney, liver, or heart transplants. Neoral works by suppressing the body's immune response, thereby reducing the risk of the body attacking the transplanted organ. In addition to its role in organ transplantation, Neoral is also prescribed for certain autoimmune conditions, such as severe psoriasis and rheumatoid arthritis, where it helps to control the body's immune response. The medication requires careful monitoring by healthcare professionals to manage its dosage and to watch for potential side effects, which can include kidney damage, hypertension, and increased susceptibility to infections.