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Related Terms:
Noun
Definition: A substance (especially a drug) that is vasotonic, usually with reference to a drug that modifies the tone of vessel walls, such as a vasopressor or a phlebotonic.
Adjective
Definition: Affecting the tone of vessels (almost always with reference to blood vessels); that is, affecting the muscle tone of the smooth muscle in the walls of blood vessels, thus influencing blood flow within the lumen.