Pharmaceutical product quality is evaluated systematically in compliance with Good Manufacturing Practices (GMP) through the Product Quality Review (PQR). It involves checking production and quality control information, like records of how products were made, test results, and any problems or complaints that came up. The PQR is used to make sure that products continuously fulfill quality standards, pinpoint areas that need improvement, and guarantee that regulations are followed. This review aids in preserving the general quality, effectiveness, and safety of the product throughout the manufacturing process.