prodrug A substance which, after metabolic action in the body, is coverted to an active drug. prodrug drug modified by biotransformation (i.e. metabolic processes) to achieve desired pharmacological action proÂ·drug (prÅ'drÅ­g) A class of drugs, the pharmacologic action of which results from conversion by metabolic processes within the body.
verb (used without object), sagged, sagging. 1. to sink or bend downward by weight or pressure, especially in the middle: The roof sags. 2. to hang down unevenly; droop: Her skirt was sagging.
v. wagged, wagÂ·ging, wags. v. intr. 1. To move briskly and repeatedly from side to side, to and fro, or up and down: The dog's tail wagged. 2. To move rapidly in talking. Used of the tongue.3.Archaic To be on one's way; depart.. tr. To move (a body part) rapidly from side to side or up and down, as in playfulness, agreement, or admonition: wagged his finger at the giggling students. n. The act or motion of wagging: a farewell wag of the hand.