The document provides a comprehensive overview of the Investigational New Drug (IND) application process, detailing its definition, types of studies, and the submission process required for clinical trials involving unapproved drugs. It covers when an IND is necessary, the content and format of an IND application, and the data needed for FDA approval. Furthermore, it outlines the differences between IND and New Drug Application (NDA) and emphasizes the importance of obtaining IND authorization for advancing drug development.
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