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Meaning of investigative new drug

inves'tigative new' drug'

Pronunciation: [key]
— Pharm. Pharm.
  1. a regulatory classification assigned by the U.S. Food and Drug Administration to an unproven drug, allowing its use in approved studies with human patients. Abbr.: IND
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.