Sandbox
To commercialize a new pharmaceutical product globally, developers must submit detailed applications to regulatory bodies (like the FDA, EMA, and HPRA). To streamline this process, the International Council for Harmonisation (ICH) developed the **Common Technical Document (CTD)** format, establishing a unified dossier structure recognized worldwide.
The 5 Modules of the CTD Structure
The CTD dossier is organized into a pyramid structure of five distinct modules:
- Module 1 (Region Specific): Contains administrative documents and labeling specific to the local region (e.g., FDA forms, regional packaging designs). This module is technically outside the global CTD definition.
- Module 2 (Summaries): Provides high-level summaries and overviews of Modules 3, 4, and 5, authored by qualified scientific experts.
- Module 3 (Quality): Details the chemistry, manufacturing, and control (CMC) parameters of the drug substance and final drug product.
- Module 4 (Nonclinical): Archives the toxicology and pharmacology reports from preclinical animal studies.
- Module 5 (Clinical): The largest module, containing clinical study reports, pharmacokinetic data, and safety profiles from human clinical trials.
The Shift to Electronic CTD (eCTD)
Virtually all modern submissions are compiled as **eCTD**, using XML structures to link files, manage document lifecycle updates, and allow regulators to navigate the massive database of files efficiently.
