Transforming Drug Development: In Vitro-In Vivo Correlation for Clinical Success

Abstract: In vitro–in vivo correlation (IVIVC) serves as a predictive mathematical model bridging in vitro drug release characteristics with corresponding in vivo pharmacokinetic responses. This correlation is integral to pharmaceutical development as it facilitates drug performance predictions, potentially reducing the need for extensive in vivo testing, thereby minimizing animal use, decreasing costs, and accelerating timelines. Establishing IVIVC involves rigorous experimental design, encompassing diverse in vitro dissolution models and in vivo absorption profiles, followed by statistical validation. The review explores various levels of IVIVC, testing methodologies, regulatory guidelines from agencies, such as the FDA and EMA, and the application of IVIVC in formulation development and quality control. Moreover, it discusses challenges in correlation due to physiological complexities, variability, and a lack of standardized methodologies. Future advancements in modeling, personalized medicine, and real-time monitoring are highlighted to enhance IVIVC accuracy and clinical translatability.