MedDRA Terminology
Medical Dictionary for Regulatory Activities — standardized medical terminology for PV coding
7 toolsmeddra-org
Search Terms
Search MedDRA terms across all hierarchy levels (SOC, HLGT, HLT, PT, LLT)
query
Get Term Hierarchy
Get the full MedDRA hierarchy path for a preferred term
preferred_term
Get Soc Terms
List all Preferred Terms under a System Organ Class
soc
Get Smq
Get Standardised MedDRA Query terms for a safety topic
smq_name
Get Hierarchy Overview
Get complete MedDRA hierarchy structure — 5 levels (LLT→PT→HLT→HLGT→SOC) with counts, relationships, and multi-axiality
no params
Get Version Info
Get MedDRA version information, biannual update cycle, and MSSO maintenance organization details
no params
Get Multiaxiality Guide
Get MedDRA multi-axiality guidance — how PTs map to multiple SOCs with primary/secondary designation and impact on signa
no params