NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,879 terms related to cancer and medicine.
Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.
- investigational drug
- listen (in-VES-tih-GAY-shuh-nul ...)
that has been tested in the laboratory and has been
approved by the U.S. Food and Drug Administration (FDA) for
testing in people. Clinical trials test how well
investigational drugs work and whether they are
safe to use. An investigational drug may be
approved by the FDA for use in one disease or condition but
still be considered investigational in other diseases or
conditions. Also called experimental drug, IND, investigational agent, and investigational new drug.