Siddha medicine is developed in pre ayurvedic period with civilization of Mohenzadaro and Harappa in the Indus river valley around 10,000 years back.The Siddha System of Medicine is a contribution of the Dravidian culture, which is one of the oldest cultures in world. Siddha system of medicine talks more about moral principle and moral guidance which is extremely relevant to our present day health care system. Ancient Tamil Civilization has contributed a lot and has left behind a relevant health care system to the world. Siddha concepts are not only relevant today it will continuously relevant in the future also.