MedDRA (Medical Dictionary for Regulatory Activities)
MedDRA (Medical Dictionary for Regulatory Activities) is a standardized terminology for coding medical events, diagnoses, and symptoms used in regulatory reporting. It enables consistent classification of adverse events across clinical trials and pharmacovigilance worldwide, supporting drug safety analysis and submissions.
What is MedDRA (Medical Dictionary for Regulatory Activities)?
MedDRA, the Medical Dictionary for Regulatory Activities, is a standardized medical terminology used to classify and code information about diseases, symptoms, diagnoses, and medical events. It provides a common vocabulary so that clinical and safety data can be described consistently.
The dictionary is organized in a hierarchy that ranges from broad system organ classes down to highly specific terms. This structure lets users group related events for analysis while still capturing precise detail.
Why is MedDRA (Medical Dictionary for Regulatory Activities) important?
MedDRA is central to regulatory reporting and pharmacovigilance, allowing adverse events from clinical trials and post-market surveillance to be coded and compared consistently across regions. This harmonization supports drug safety analysis and regulatory submissions worldwide.
Because regulators and manufacturers use the same terminology, MedDRA reduces ambiguity when safety signals are evaluated. Consistent coding makes it possible to aggregate data from many sources and detect patterns that might otherwise be obscured by inconsistent wording.
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