The chemistry that requires a blend of both theoretical and practical knowledge is called Process Chemistry. Manufacturing & development of a product in large scale while keeping in mind the cost effectiveness & safety of the product is the main objective of any process chemist in medicinal chemistry. One way of doing so is to use costly reagents only in the later process of manufacture so to avoid wastage. Thus Process Chemistry is involved with Sustainable or green chemistry which is increasingly becoming important & adds another level of complexity to the system. Working in Process Chemistry be very beneficial in cases of job satisfaction, as it involves products along the development chain. Pharmaceutical sector depends on Process chemistry in the development and optimization of production processes for chemical compounds and the scaling up of laboratory reactions.