Submission & Approval

Common Technical Document(CTD)

An internationally harmonized format for organizing pharmaceutical regulatory submissions into five standardized modules.

Usage Examples

The application was organized according to CTD format.
Module 3 of the CTD contains all quality and CMC information.
The CTD summaries in Module 2 provide overviews for each discipline.

What is CTD?

The Common Technical Document (CTD) is the harmonized structure for pharmaceutical applications adopted by regulatory authorities in ICH regions (US, EU, Japan) and many other countries. Developed by ICH under the M4 guideline, CTD standardizes the organization of technical documentation.

The CTD comprises five modules: Module 1 (regional administrative information), Module 2 (quality, nonclinical, and clinical summaries), Module 3 (quality/CMC data), Module 4 (nonclinical study reports), and Module 5 (clinical study reports). While Module 1 varies by region, Modules 2-5 are common across all ICH regions.

The electronic implementation of CTD is known as eCTD, which adds XML backbone files for navigation and lifecycle management.

Regulatory Context

This term appears most often in submission & approval workflows where submission quality, regulatory evidence, and audit readiness depend on consistent language. It is commonly referenced alongside ICH M4, ICH M2.

FDAICHEMA

When This Matters

The application was organized according to CTD format.
Module 3 of the CTD contains all quality and CMC information.
The CTD summaries in Module 2 provide overviews for each discipline.

Common Mistakes

Treating submission readiness as a formatting-only check without lifecycle validation.
Using outdated guidance references across modules and summaries.
Missing cross-functional review between RA, CMC, and quality before submission.

Related Regulations

ICH M4ICH M2

Frequently Asked Questions

CTD refers to the document organization structure, while eCTD is the electronic implementation using XML backbone files. eCTD enables electronic submission, navigation, and lifecycle management of CTD-formatted content.

CTD is mandatory in ICH regions (US, EU, Japan, Canada, Switzerland) and accepted or required by many other regulatory authorities. Some countries have regional variations for Module 1.

Module 1: Regional forms and administrative documents. Module 2: Summaries and overviews. Module 3: Drug substance and drug product quality data. Module 4: Pharmacology and toxicology studies. Module 5: Clinical pharmacology, efficacy, and safety studies.