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Abstract

Discovery of the drug molecule which has therapeutic values is the backbone of drug development. Pharmaceuticals have an important role in the prevention and treatment of diseases in humans and animals. However, gradual change in the process of drug synthesis from drug development to bulk production is a common complication in the drug development process. This change may result in the formation of impurities. Moreover, impurities can also be formed during transport and storage. The presence of more than the prescribed limit of impurities in the drugs may influence the purpose of the pharmaceuticals. Therefore, the evaluation of pharmaceutical drugs for the identification and quantification of impurities at various stages is essential. Several chemical and instrumental methods are used to assess the impurities. For this purpose, analytical instrumentations and methods play a crucial role. The current review highlights the development of impurities at various stages of drug development and pharmaceutical manufacturing. Moreover, this review put light on the recent advancement in the analysis of pharmaceuticals.