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    Data & Quality

    Adverse Event (AE)

    An adverse event (AE) is any untoward medical occurrence in a clinical trial participant administered a pharmaceutical product, regardless of whether it is considered related to the product.

    AEs are categorized by seriousness (Serious AE: death, life-threatening, hospitalization, persistent disability, congenital anomaly, or important medical event) and by relationship to study drug (related, possibly related, unrelated). Serious Adverse Events trigger expedited safety reporting under ICH E2A.

    Suspected Unexpected Serious Adverse Reactions (SUSARs) must be reported to regulators within 7 days (fatal/life-threatening) or 15 days (other serious unexpected). MedDRA is the standard adverse-event terminology dictionary.

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