This document provides an overview of medical ethics, informed consent, and advance directives. It discusses key principles of medical ethics including autonomy, beneficence, non-maleficence, and justice. It defines informed consent and its legal and ethical basis, noting it is based on a patient's right to receive information and choose treatment. Exceptions to informed consent requirements are also outlined. Advance directives allow for healthcare decision making according to a patient's wishes if they become incapacitated. Case examples demonstrate how these principles apply to clinical scenarios.