Pharmacovigilance: Translating Adverse Events Correctly

A poorly translated adverse event isn’t just a language mistake — it’s a pharmacovigilance data point that can turn into the wrong safety signal. Adverse event reports, especially those classified as serious (SAEs), feed regulatory databases that compare events across sites, countries, and languages. If the translation uses a loose synonym where it should use the exact MedDRA term, the system stops recognizing two reports of the same event as the same thing.

This guide covers why pharmacovigilance demands more than a fluent translation, what changes when the document is an SAE, and what must always be preserved — even in long reports with dozens of events per patient.

Why pharmacovigilance demands more than “translating well”

A translation can be grammatically flawless and still fail at pharmacovigilance, because the standard here isn’t sounding good — it’s matching exactly a controlled term. MedDRA (Medical Dictionary for Regulatory Activities) organizes adverse events into a hierarchy of Preferred Terms (PT) and Lowest Level Terms (LLT), and every reported event needs to be coded to one of these terms, in the target language, to be comparable with equivalent reports in other languages.

A generic translation model doesn’t have that dictionary as a reference — it translates the sentence, not the code. The result is usually grammatically correct and clinically imprecise: exactly the kind of error that slips past a superficial review.

MedDRA terms: why a loose synonym doesn’t work

This applies even to events with a well-established everyday name: “headache” is fine in participant-facing text (in the consent form, for example), but in a formal adverse event report the coded term is “cefaleia”. The difference between the two registers — accessible language versus coded terminology — needs to be recognized by the translator, document by document.

SAEs: the document that leaves no room for ambiguity

A serious adverse event (SAE) carries a regulatory notification deadline — often 24 hours — and translation happens inside that clock. A poorly translated SAE that has to be sent back for clarification isn’t just a quality problem: it can jeopardize the notification deadline to the regulator or the ethics committee.

An example of how an SAE loses precision in translation:

The first version describes the event in everyday language — it drops the MedDRA term (“anaphylactic reaction”), the severity grade, and the correct terminology (“participant”, not “patient”). None of these elements is optional in an SAE report.

What can never change when translating adverse events

Checklist before submitting an adverse event report

How this works in practice

Every pharmacovigilance document processed by SealScribe runs through a glossary built from official sources (MedDRA in Portuguese, ANVISA’s Controlled Vocabulary, DCB for drug names), with each coded term locked consistently across every occurrence — even in 200+ page documents with dozens of events per participant — and review before delivery. When the document contains patient identifying data, anonymization runs before anything reaches the cloud, without altering any clinical data — included in every order, at no extra cost.