eCTD Module 4
CTD Module 4 is the fourth in a five-module common technical document (CTD) made to standardize the submissions and registrations process of a drug. CTD Module 4 is also referred to as Module 4 CTD, eCTD Module 4 (eCTD being short for electronic common technical document) or ICH Module 4 (ICH being short for International Conference on Harmonisation) and refers specifically to the information that must be collected during nonclinical studies.