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FAERS - FDA Adverse Event Reporting System

Organization: Food and Drug Administration

Description

The FDA Adverse Event Reporting System (FAERS) Database supports the FDA's post-marketing safety surveillance program for all marketed drug and therapeutic biologic products. It contains quarterly adverse event reports FDA has received from manufacturers as required by regulation along with reports received directly from consumers and healthcare professionals.

The informatic structure of the FAERS database adheres to the international safety reporting guidance issued by the International Conference on Harmonisation (ICH E2B). Adverse events and medication errors are coded to terms in the Medical Dictionary for Regulatory Activities (MedDRA) terminology.

FAERS is being consolidated into the FDA’s new FDA Adverse Event Monitoring System (AEMS), which is refreshed daily.

Key Information

Dataset Contents
Data Date Span 2021-Oct-01 to 2025-Dec-31
Event Count 7,150,527
Update Status Active
Dataset Type Case Reports
Event Context All
Region United States
Age Restrictions N/A
Access & Availability
Native Data Structure Custom
Hosting Hosted by data user
Database File Size 6.3 GB
Availability Restrictions None
Data Identifiability De-identified

References and Resources:

Dataset Dictionary

FAERS Data Dictionary

Dataset Publications

  • Potter E, Reyes M, Naples J, Dal Pan G. FDA Adverse Event Reporting System (FAERS) Essentials: A Guide to Understanding, Applying, and Interpreting Adverse Event Data Reported to FAERS. Clin Pharmacol Ther. 2025 Sep;118(3):567-582. doi: 10.1002/cpt.3701. Epub 2025 May 19. PMID: 40384638; PMCID: PMC12393772.

Last updated Jun 22, 2026