Unknowns and impurities in medicinal drugs is a major concern in the pharmaceutical industry due to their potential implications on human health. Guidelines have been established by regulatory agencies to monitor and control these impurities. As a trusted partner in the pharmaceutical industry, Shimadzu provides a variety of instruments and suitable workflows for drug impurity analysis to help ensure compliance to these guidelines. This handbook shares a wide variety of methodologies for different classes of drug impurities using different equipment like LC-MS/MS, UHPLC, GC-MS, GC-MS/MS, ICP-MS. These methods are in sync with relevant ICH guidelines and provides a simple solution for scientists who seek confident analyses.