| Defining URL | http://terminology.hl7.org/NamingSystem/MDREX |
| Version | 2.1.0 |
| Name | MDREX |
| Title | MedDRA expanded |
| Status | retired |
| Definition | Medical Dictionary for Regulatory Activities Terminology (MedDRA), with expanded abbreviations, Version 7.0. Bethesda, MD: National Library of Medicine, March 1, 2004. |
| Publisher | ICH |
| Type | Value | Preferred |
| OID | 2.16.840.1.113883.6.164 | true |
| URI | http://terminology.hl7.org/CodeSystem/MDREX | true |