This review examines the application of machine learning (ML) in physiologically based pharmacokinetic (PBPK) modeling through improved prediction of input parameters, particularly via quantitative structure-activity relationship (QSAR) models, for absorption, distribution, metabolism, and excretion (ADME) properties across drug development phases. Traditional PBPK models, while mechanistically sound, face limitations in applicability domain when compound-specific physicochemical and biochemical
