You have been given a new transplanted liver or kidney, lung or heart from another person because your own was no longer healthy. Your body recognises that this new organ is different from your other organs and will try to reject it by attacking it in the same way that it would attack germs that enter your body. This could make you become ill again. ADVAGRAF XL stops this attack; it is very important to take ADVAGRAF XL given to you by your doctor regularly so that your new liver, kidney, lung or heart will not be attacked or rejected.