Definition of experimental drug - NCI Dictionary of Cancer Terms

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experimental drug (ek-SPER-ih-men-tul ...)

A substance that has been tested in a laboratory and has gotten approval from the U.S. Food and Drug Administration (FDA) to be tested in people. An experimental drug may be approved by the FDA for use in one disease or condition but be considered investigational in other diseases or conditions. Also called investigational agent and investigational drug.

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