Documenting symptom and context changes in individual case safety reports: a methodological perspective

Individual case safety report narratives support pharmacovigilance by preserving clinical chronology and contextual information. A possible information gap concerns how documented symptom changes, surrounding circumstances, and actions already taken are linked and attributed to their sources. Its frequency and consequences have not been established. This Perspective proposes a minimal representation of symptom trajectories, context, actions, subsequent responses, concurrent changes, and remaining uncertainty. A limited procedural inspiration is the repeated observation and revision of working hypotheses used in dynamic psychotherapy; this does not establish a new pharmacovigilance diagnostic method. The proposal builds on existing case processing, causality frameworks, quality assessment, and follow-up practice. Evaluation would first audit source records and processing histories, then compare the proposed representation with optimized routine narratives containing the same facts. An independently adjudicated reference would specify what the records support, without claiming to establish biological causality. The primary endpoint would be correct reconstruction of prespecified case information; unsupported conclusions, completion, and workload would be assessed separately. Additional questioning would require a later, distinct evaluation of information yield, nonresponse, recall, and questioning effects. Contextual information must not delay reporting or justify unsupported dismissal of a medicinal-product contribution. The representation warrants testing, including the possibility that good routine processing already provides equivalent practical information.