MedDRA

MedDRA

MedDRA or Medical Dictionary for Regulatory Activities is a clinically validated international medical terminology used by regulatory authorities and the regulated biopharmaceutical industry throughout the entire regulatory process, from pre-marketing to post-marketing activities, and for data entry, retrieval, evaluation, and presentation. In addition, it is the adverse event classification dictionary endorsed by the International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use (ICH). MedDRA is used in the US, European Union, and Japan. Its use is currently mandated in Europe and Japan for safety reporting.

MedDRA is managed by the MSSO (Maintenance and Support Services Organization), an organization that reports to the International Federation of Pharmaceutical Manufacturers and Associations (IFPMA). MedDRA is free for regulators and priced according to company revenue for industry. MedDRA is also available in Japanese. The Japanese counterpart for MSSO is called JMO.

The MSSO updates MedDRA from subscriber change requests to add a new medical concept that is yet to be in MedDRA or to change an existing concept. The decisions are made by international medical officers on how to map the terminology within the grouping categories according to a general consensus based on language considerations internationally.

The MSSO releases updated MedDRA versions twice a year - in March and September. The March release is the main annual release and contains LLT and PT changes, and changes at the HLT level and above. The September release typically contains changes only at the LLT and PT level. The March 2008 Version 11.0 release is the current version.

The FDA has committed to keeping current on MedDRA, and it has become the standard for adverse event reporting in the USA.

The MedDRA dictionary is organized by System Organ Class (SOC), divided into High-Level Group Terms (HLGT), High-Level Terms (HLT), Preferred Terms (PT) and finally into Lower-Level Terms (LLT). In addition, the MedDRA dictionary includes Standardized MedDRA Queries (SMQs). SMQs are groupings of terms that relate to a defined medical condition or area of interest.

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