The EUA-PREP-CICP Medico-Legal Framework for Nirmatrelvir/Ritonavir During the COVID-19 Pandemic

The coronavirus (COVID-19) pandemic necessitated unprecedented regulatory responses that enabled rapid therapeutic deployment. The integrated medico-legal framework—comprising the FD&C Act Section 564 (Emergency Use Authorization/EUA), PREP Act (liability immunity), and CICP (injury compensation)—facilitated emergency response while protecting all stakeholders. This normative legal and policy analysis examines nirmatrelvir/ritonavir (Paxlovid) as a case study, integrating emerging pharmacokinetic evidence demonstrating its passage across the blood–brain and blood–placenta barriers. The EUA-PREP-CICP framework achieved notable results: nirmatrelvir/ritonavir’s authorization enabled deployment approximately 1 year after trials began, demonstrating an 89% reduction in the risk of hospitalization or death and potentially preventing thousands of hospitalizations. The PREP Act enabled focused pharmaceutical development and protected frontline healthcare workers during the crisis, though access barriers and transparency concerns remain areas warranting ongoing attention. The CICP provided administrative compensation for qualifying injuries, with acknowledged limitations in filing timelines and causation standards. Pharmacokinetic studies published after authorization revealed biological barrier crossing, representing normal scientific progress through continued investigation. The EUA-PREP-CICP nexus functioned as an integrated system: EUA enabled rapid evidence-based access, PREP immunity facilitated development and deployment, and CICP provided injury remedy. Based on this experience, this study proposes targeted enhancements to further strengthen this framework: systematic post-authorization surveillance timelines, enhanced special population monitoring through registries, modest procedural refinements to CICP, and improved surveillance infrastructure. These evidence-based improvements would build on the framework’s demonstrated strengths, optimizing performance for future emergencies while preserving the essential functions that helped address the COVID-19 pandemic.