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Published online by Cambridge University Press: 08 April 2025
This study characterizes 2008-2022 FDA advisory committee discussions of new supplemental indication applications that were not approved by FDA. Discussion themes included contextual concerns unique to already-approved drugs, including insights from prior experience and concerns about off-label use, and efficacy and safety concerns also observed for new drugs. These findings highlight advisory committees’ role in transparency of regulatory decision-making, specifically for drugs already authorized for use.