Cellcept Tablets 500mg – Immunosuppressant for Organ Transplant PatientsCellcept Tablets 500mg Immunosuppressant for Organ Transplant Patients Cellcept Tablets 500mg (Mycophenolate Mofetil) are a powerful immunosuppressive medication used to prevent organ rejection in patients who have undergone renal, cardiac, or hepatic transplants. This medication works by inhibiting the proliferation of lymphocytes (T and B cells), which are involved in the immune response, thus preventing the body from rejecting a transplanted organ.