# Medical Dictionary for Regulatory Activities Terminology (MedDRA) (MEDDRA)

> MedDRA is an international medical terminology with an emphasis on use for data entry,...

- Page: https://library.schematica.io/model/208be642cb604040ac8657182b6c7819
- Model type: Ontology
- License: Commercial
- Access type: Premium
- Access method: Email Request
- Model size: Huge
- Formats: UMLS
- Domains: Healthcare
- External link: https://bioportal.bioontology.org/ontologies/MEDDRA
- Contact: MedDRA MSSO (mssohelp@meddra.org)
- Listed in library: 2025-06-12
- Last updated: 2025-09-10

## Description

## Ontology Info

| Field | Value |
|-------|-------|
| Acronyme | MEDDRA |
| Description | MedDRA is an international medical terminology with an emphasis on use for data entry, retrieval, analysis, and display. It applies to all phases of drug development, excluding animal toxicology, and to the health effects and malfunction of devices. An appendix includes concept descriptions which describe how a medical concept is interpreted, used, and classified within the MedDRA terminology. It is not intended as a medical definition. The concept descriptions are intended to aid the consistent and accurate use of MedDRA in coding, retrieval, and analysis. |
| Format | UMLS |
| Categories | Health |
| Groups | Unified Medical Language System, Cancer Biomedical Informatics Grid |

## Metrics

| Metric | Value |
|--------|-------|
| Classes | 81,485 |
| Individuals | 0 |
| Properties | 13 |
| Max Depth | 7 |
| Max Child Count | 0 |
| Average Child Count | 0 |
| Classes With One Child | 0 |
| Classes With More Than 25 Children | 0 |
| Classes With No Definition | 81,255 |

## Projects using MEDDRA

- [ISA software suite](https://bioportal.bioontology.org/projects/ISS)
- [Socrates MD](https://bioportal.bioontology.org/projects/Socrates_MD)
- [PractiKPharma](https://bioportal.bioontology.org/projects/PractiKPharma)
- [Mapping of Norwegian national quality registries- Variabelbibliotek for medisinske kvalitetsregistre](https://bioportal.bioontology.org/projects/RegMap)
- [Lexigram](https://bioportal.bioontology.org/projects/lexigram)
- [TerminologyLinkingService](https://bioportal.bioontology.org/projects/TLS)
- [eTOX](https://bioportal.bioontology.org/projects/eTOX)
- [NLP for the prediction of chemotherapy response](https://bioportal.bioontology.org/projects/TalRep)
- [Safety and Toxicity of Excipients for Paediatrics (STEP) Database](https://bioportal.bioontology.org/projects/STEP+database)
- [Signaling ADEs from social media](https://bioportal.bioontology.org/projects/ASPASM)
- [Tao Hoang](https://bioportal.bioontology.org/projects/T.+Hoang)

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Source: https://library.schematica.io/model/208be642cb604040ac8657182b6c7819