ICH M4 (CTD) - The Common Technical Document

What it says

The Common Technical Document establishes a harmonised format and organisation for regulatory submissions across ICH regions, structured into five modules covering administrative information, summaries, quality (chemistry, manufacturing and controls), nonclinical study reports, and clinical study reports, allowing a single core submission structure to support applications in multiple regulatory jurisdictions.

Paraphrased for plain-language clarity. Always verify against the current published regulation text.

What it means in practice

• The CTD format's harmonisation is what allows a company to prepare largely the same core submission content, particularly the quality and nonclinical and clinical study modules, for regulatory review across the US, EU, Japan and other participating regions, substantially reducing duplicated submission preparation effort.
• Module 3, covering quality information, is where chemistry, manufacturing and controls data lives, directly connecting the CTD structure to the specific manufacturing, validation and specification documentation described throughout the rest of the regulatory framework.
• While the module structure is harmonised, specific regional requirements and administrative information still differ, meaning the CTD format standardises document organisation and structure rather than eliminating all regional regulatory differences.

What inspectors look for

• This is a submission format and structure standard rather than a specific manufacturing practice inspectors check during a facility inspection - its practical relevance is ensuring that Module 3 quality information accurately and currently reflects the facility's actual manufacturing and control practices.
• Whether changes made to manufacturing processes or control strategies are properly reflected in updates to the corresponding CTD Module 3 content submitted to regulators.

Related regulations