This document provides an overview of medical ethics and its principles. It begins with introducing the concept of medical ethics, its importance and branches. It then discusses in detail the key principles of medical ethics - autonomy, beneficence, confidentiality, non-maleficence, and justice. It also outlines various ethical codes and regulations that guide medical practice, including the Hippocratic Oath, Declaration of Geneva, and ICMR guidelines. The document concludes by discussing public health ethics, research ethics, and highlighting issues like informed consent and risk-benefit analysis.