FDA's GMP Expectations for Phase I and First-in-Man Clinical Trials

Early clinical trials are conducted to establish initial safety of a drug. The studies are generally in small number of healthy subjects and use lower doses of the drug product. Therefore, only small amounts of investigational material are required. In order to not undertake substantial costs and to reduce regulatory burden during these early stages, the FDA has established guidelines to allow early stage investigational products to be manufactured under less stringent GMPs.