The document outlines the structure and functions of various regulatory agencies involved in drug safety and efficacy, including the CDSCO in India, FDA in the US, and EMEA in Europe. It details the evolution of Indian drug legislation, emphasizing the roles of the Ministry of Health and Family Welfare, as well as the principles of Good Laboratory Practice (GLP) aimed at ensuring the quality of laboratory studies. Additionally, it touches on the significance of Contract Research Organizations (CROs) in the drug development process.