Mycophenolate Mofetil is a medication primarily used to prevent organ rejection in patients who have received a transplant. It works by suppressing the immune system, specifically targeting certain white blood cells that can attack the transplanted organ. This helps to ensure that the body accepts the new organ and functions properly. In addition to its use in transplant patients, Mycophenolate Mofetil may also be prescribed for autoimmune diseases, such as lupus or rheumatoid arthritis. It is usually taken orally in the form of a capsule or liquid, and patients are monitored for potential side effects, including increased risk of infections.