Modern Instrumental Techniques for Evaluation of APIs and Drug Products provides a comprehensive overview of advanced analytical methodologies essential for the qualitative and quantitative assessment of Active Pharmaceutical Ingredients (APIs) and finished formulations. The book covers principles, instrumentation, and applications of techniques such as HPLC, UPLC, LC-MS/MS, FTIR, DSC, PXRD, and spectroscopy, emphasizing regulatory validation and data interpretation. It serves as an invaluable resource for students, researchers, and professionals in pharmaceutical analysis, ensuring quality, safety, and efficacy of modern drug products.