Preventive Medicine is somewhat a new division of medicine. It is more often regarded substitutable with Community Medicine, Public Health, and Community Health in India. All these share common ground, i.e., prevention of disease and promotion of health. Public health has over and over again been defined as a science coping with the determinants and defence of health at the population level. Public health aims to interpret and act upon the social, cultural and economic determinants of health in addition to study and structure health systems as resourceful channels for health services delivery. Public health is therefore, a discipline built on the academic institution of inquiry comprising research, teaching and professional practice to put a stop to disease and promote health in populations. Anti-diabetic drugs treat diabetes mellitus by lowering glucose levels in the blood. With the exceptions of insulin, exenatide, and pramlintide, all are administered orally and are thus also called oral hypoglycemic agents or oral antihyperglycemic agents. There are different classes of anti-diabetic drugs, and their selection depends on the nature of the diabetes, age and situation of the person, as well as other factors. This book becomes highly useful and must-read for students, researchers and professionals in botany, biotechnology, bioinformatics, environmental sciences, agriculture, molecular biology and other streams of biological sciences.