Mycophenolic acid is a medication used to prevent organ rejection in individuals who have received organ transplants, such as kidney, heart, or liver transplants. It belongs to a class of drugs known as immunosuppressants.

After an organ transplant, the body’s immune system may recognize the transplanted organ as foreign and mount an immune response against it, leading to organ rejection. Mycophenolic acid works by suppressing the immune system, specifically by inhibiting the proliferation of T and B lymphocytes, which are immune cells involved in the rejection process.