An Advance Directive for Health Care is a written legal document that allows you to instruct your attending physician whether or not you wish to be given life-sustaining treatments and artificially administered nutrition (food) and hydration (water) and to give other medical directions that impact the end of life. Its purpose is to recognize your right to control some aspects of your medical care and treatment, primarily the right to decline medical treatment or direct that it be withdrawn even if death ensues.