Abstract
The optimal use of immunosuppressant drugs requires an understanding of their mechanism of action as well as a basic understanding of the biology of transplant rejection and tolerance. The ability to tailor a drug regimen that strikes a fine balance between allograft maintenance and patient well-being demands a sensitivity to the patient's needs and expectations as well. The object of this article is to cover the basic biological principles involved in selecting an immunosuppressant protocol while sharing our experiences with these various regimen.