October Deadline for New Adverse Event Reporting Standard

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FDA says beginning 10/1 it will require drugmakers and other regulated entities to adopt updated international data standards for submitting postmarketing safety reports, according to a notice scheduled for publication in the Federal Register.

The requirement applies to individual case safety reports (ICSRs) for human drugs, biologics and certain combination products submitted electronically to the agency’s Adverse Event Monitoring System (AEMS), the database formerly known as FAERS. Submissions made through the agency’s Electronic Submissions Gateway Next Generation (ESG NextGen) must use the International Council for Harmonization E2B(R3) format, a globally harmonized standard designed to improve the consistency and usability of safety data.

FDA officials said the updated format will enhance the quality of adverse event reporting and enable more efficient analysis. The E2B(R3) standard introduces expanded and revised data elements, evaluates seriousness at the individual event level rather than the overall case level, and allows attachments to be embedded directly within reports.

The transition marks the culmination of a multi-year shift toward international harmonization. FDA began accepting E2B(R3)-formatted submissions in 1/2024, allowing a two-year transition period during which companies could continue using the older E2B(R2) standard. Beginning 10/1, that transition period will end, and the agency said it intends to stop accepting ICSRs submitted in the legacy format.

Under existing regulations, pharmaceutical companies, biologics manufacturers and other responsible parties are required to submit postmarketing safety reports in an electronic format that FDA can process, review and archive. The updated standard is intended to align U.S. reporting requirements with international practices and improve pharmacovigilance capabilities.

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