• The FDA has finalized its guidance on clinical pharmacology considerations for antibody-drug conjugates (ADCs), providing a framework for drug developers focusing on the cytotoxic payload.
• The guidance emphasizes bioanalytical methods, dosing strategies, exposure-response analysis, intrinsic patient factors, QTc assessments, immunogenicity, and drug-drug interactions (DDIs).
• Key areas of interest include measuring ADC constituents and metabolites, conducting exposure-response analyses, and assessing intrinsic factors like renal or liver impairment.
• The guidance also addresses QTc assessment for cardiac safety, drug-drug interaction risk, and dosing strategies to maximize the therapeutic index of ADCs.