Reminder: Proposed MedDRA Version 23.0 Complex Changes are available for comments

4 September 2019

The MSSO has posted proposed complex changes for MedDRA Version 23.0 on  the MedDRA website in the Change Request section under “Related Documents”. Complex changes are changes to the MedDRA hierarchy, i.e., the High Level Terms (HLTs), High Level Group Terms (HLGTs), or System Organ Classes (SOCs).
We encourage your comments both for and against the proposed complex changes so that we can understand the potential impact on your use of MedDRA.
The deadline for your response to these proposals is 20 September 2019.  Please send your comments to