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MedDRA - the Medical Dictionary for Regulatory Activities - is a pragmatic, medically valid terminology with an emphasis on ease of use for data entry, retrieval, analysis, and display, as well as a suitable balance between sensitivity and specificity within the regulatory environment. It was developed by ICH (the International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use) and is owned by IFPMA (the International Federation of Pharmaceutical Manufacturers and Associations) acting as trustee for the ICH steering committee.

MedDRA is maintained by the Maintenance and Support Services Organization (MSSO) ( and the Japanese Maintenance Organization (JMO). The activities of JMO are limited to maintain the Japanese version of MedRDA and to distribute and support companies in Japan. Companies whose locations are outside of Japan can purchase the Japanese version of MedDRA from the MSSO.
If you have any question regarding the Japanese version of MedDRA or MedDRA utilization in Japan, please do not hesitate to contact the JMO.