Deximune is a medication primarily used in the field of transplantation medicine to prevent organ rejection in patients who have undergone kidney, liver, or heart transplants. It contains the active ingredient cyclosporine, which is a type of immunosuppressant. Cyclosporine works by inhibiting the activity of certain cells in the immune system that would normally attack the transplanted organ. By suppressing this immune response, Deximune helps to protect the new organ and ensure its proper function within the recipient's body. It is crucial for patients taking Deximune to adhere closely to their prescribed dosage and monitoring schedule, as maintaining the correct level of medication in the body is key to preventing rejection while minimizing potential side effects.