How to Report a Serious Adverse Event in a Trial
Move an event from site awareness to a submitted expedited report without losing the clock.
What a how-to is not
A how-to is SPEQ’s practitioner method, not a procedure. It does not replace your own SOP, it is not a validated approach, and the judgement calls in it belong to your quality unit.
Trial safety reporting is a relay with two clocks and three assessments, and it is routinely confused with postmarketing case processing. The investigator reports serious events to the sponsor; the sponsor decides which of them are suspected, unexpected and serious enough to require expedited notification to the authority. Getting the relay wrong does not usually lose the event — it loses the deadline.
- 1
Record the event and assess seriousness at the site
Seriousness is a regulatory definition, not a severity rating: death, life-threatening, inpatient hospitalisation or its prolongation, persistent or significant disability, congenital anomaly, or another important medical event. A severe headache is not serious; a mild event that required hospitalisation is.
- 2
Report serious events to the sponsor immediately, unless the protocol exempts them
The investigator’s obligation runs to the sponsor and is immediate, with the protocol defining which events are exempt from that immediacy because they are anticipated endpoints. An event exempted by the protocol still goes into the data; it simply does not trigger the relay.
- 3
Assess causality at the site and again at the sponsor
The investigator gives a causality assessment; the sponsor makes its own. Where the two differ, both are retained and reported — the sponsor may not overwrite the investigator’s view, and a report showing only one assessment where two exist is incomplete.
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Assess expectedness against the reference safety information
Expectedness is judged against the named reference document, usually the investigator brochure, and against the version in force when the event occurred. This is the assessment most often done from memory, and it is the one that determines whether an expedited report is required at all.
- 5
Apply the right clock to the right outcome
For a suspected unexpected serious adverse reaction that is fatal or life-threatening, the sponsor notifies the authority as soon as possible and no later than 7 calendar days from receipt, with the fuller report following within a further 15 calendar days. Other suspected unexpected serious adverse reactions run to 15 calendar days.
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Notify the participating investigators and the review board
Sites need the safety information to judge expectedness on the next event and to re-consent where the risk picture changed. A sponsor that reports upward to the authority and never back down to the sites has satisfied half of the obligation.
- !Seriousness confused with severity, so a severe but non-serious event is escalated and a mild hospitalisation is not.
- !The sponsor’s causality assessment replacing the investigator’s rather than being recorded alongside it.
- !Expectedness judged against the current brochure rather than the version in force when the event occurred.
- !The fatal or life-threatening clock treated as the same as every other, losing the shorter window.
How to Report a Serious Adverse Event in a Trial: frequently asked questions
Common questions on report a serious adverse event in a trial.
What is the difference between a serious adverse event and a reportable one?
Seriousness is a property of the event. Expedited reportability additionally requires that it be suspected to be caused by the drug and unexpected against the reference safety information. Most serious events in a trial are neither unexpected nor attributed, and they flow into periodic reporting rather than an expedited report.
Which clock applies to a fatal or life-threatening case?
The shorter one. The sponsor notifies as soon as possible and no later than 7 calendar days after receiving the information, then follows with a fuller report within a further 15 calendar days. Every other suspected unexpected serious adverse reaction runs to 15 calendar days from receipt.
Can the sponsor downgrade the investigator’s causality assessment?
It can reach a different conclusion, but it cannot replace the investigator’s. Both assessments are retained and reported. A file showing only the sponsor’s view where the investigator recorded one is an incomplete record, and the discrepancy is exactly what a reviewer looks for.