Generic Drug Product approval is most stringent and crucial process for company with different rules and regulation in different country. For the registration of the product company has to follow regulatory rules and requirement of country specific agency. Company should apply product marketing authorization as per norms of country requirements and should manage life cycle of that product throughout market. Need to understand and describe the various regulatory requirements for the generic drug approval process and comparison of regulated country. To understand the technical requirements required to market medicines in regulated pharmaceutical market. To evaluate similarities and differences within regulated market of U.S, Canada, and Europe. To understand and evaluate differences of post approval Changes within regulated market.