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SAE Reporting Timeline Quick Reference

A concise reference guide to Serious Adverse Event (SAE) reporting timelines, covering regulatory requirements for investigators, sponsors, ethics committees, and regulatory authorities. Essential for ensuring timely safety reporting compliance in clinical trials.

November 27, 2025494 views

SAE Reporting Timeline Overview

Timely reporting of Serious Adverse Events (SAEs) is critical for participant safety and regulatory compliance. This quick reference provides the essential timelines and requirements you need to ensure compliant SAE reporting.


Definition: What Qualifies as an SAE?

An adverse event is considered serious if it meets any of the following criteria:

CriterionDescription
DeathResults in death
Life-threateningPlaces the participant at immediate risk of death
HospitalizationRequires inpatient hospitalization or prolongs existing hospitalization
DisabilityResults in persistent or significant incapacity or substantial disruption of normal life functions
Congenital anomalyResults in a congenital anomaly or birth defect
Important medical eventRequires intervention to prevent one of the outcomes above

Investigator Reporting Timelines

Investigator to Sponsor notification requirements:

Event TypeTimelineNotes
Fatal or life-threatening SAEImmediately, within 24 hoursPhone notification followed by written report
All other SAEsWithin 24-72 hoursPer protocol requirements; 24 hours is preferred
Follow-up informationAs availableOngoing until resolution or stabilization

Key Actions for Investigators:

  • Document the event in source documents immediately upon awareness
  • Complete the SAE report form with all available information
  • Report to the sponsor regardless of perceived causality
  • Notify the IRB/Ethics Committee per local requirements
  • Provide follow-up reports until resolution

Sponsor Reporting Timelines

Sponsor reporting to regulatory authorities:

Report TypeTimelineApplicable Events
IND Safety Report (FDA)7 calendar daysFatal or life-threatening unexpected suspected adverse reactions
IND Safety Report (FDA)15 calendar daysAll other unexpected serious suspected adverse reactions
SUSAR to EMA7 days (initial)Fatal or life-threatening SUSARs
SUSAR to EMA15 daysAll other SUSARs
Annual Safety ReportWithin 60 days of DIBDComprehensive annual safety update

Definitions:

  • SUSAR: Suspected Unexpected Serious Adverse Reaction
  • DIBD: Development International Birth Date (anniversary of first regulatory approval to conduct trials)
  • IND: Investigational New Drug application

Ethics Committee / IRB Notification

Event TypeTimelineNotes
Unanticipated problems involving riskPromptly, per IRB requirementsTypically within 5-10 business days
DeathsWithin 24-48 hoursPer local IRB policy
Serious, unexpected, related eventsWithin 10 business daysOr per IRB-specified timeline
Protocol deviations affecting safetyPromptlyUsually within 5 business days

Expedited vs. Aggregate Reporting

Expedited Reporting Required When:

  • Event is serious AND
  • Event is unexpected (not in IB or consent) AND
  • Event is possibly related to the investigational product

Aggregate Reporting (Annual Safety Reports):

  • Summary of all SAEs
  • Updated benefit-risk assessment
  • Line listings by system organ class
  • Narrative summaries of significant events

Documentation Requirements

Each SAE report must include:

  • Participant identifier (not name)
  • Event description and onset date
  • Severity and seriousness criteria met
  • Causality assessment
  • Action taken with investigational product
  • Outcome and resolution date (if applicable)
  • Reporter information

Clock Start Times

ScenarioClock Starts When
Investigator reportingInvestigator becomes aware of the event
Sponsor reportingSponsor receives minimum information for valid report
Minimum informationIdentifiable patient, identifiable reporter, suspect product, serious adverse event

Common Pitfalls to Avoid

  • Delayed initial notification: Report immediately, even with incomplete information
  • Waiting for causality determination: Report regardless of perceived relationship
  • Incomplete follow-up: Continue reporting until resolution
  • Missing clock start documentation: Record date/time of awareness
  • Inconsistent terminology: Use MedDRA coding for consistency

Regional Variations

RegionPrimary AuthorityKey Requirement
United StatesFDA21 CFR 312.32
European UnionEMA/National AuthoritiesRegulation EU 536/2014
United KingdomMHRAUK SI 2004/1031
JapanPMDAJ-GCP, PAL
CanadaHealth CanadaFDR C.05.014

Always verify current local requirements as timelines may vary by jurisdiction.

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