What does vasoactive mean?
Vasoactive is a medical and pharmacological adjective describing something that alters the diameter or tone of blood vessels. Such effects may open vessels, as in vasodilation, or narrow them, as in vasoconstriction, so the term is broader than either vasodilator or vasoconstrictor. The word is especially common in discussions of drugs, natural mediators such as nitric oxide, vascular research, and clinical responses that depend on changes in blood flow. Its use is formal and technical, but its meaning is straightforward once the elements are understood: vaso refers to vessels and active indicates an effect. Recognising the distinction matters because calling an agent merely vasodilator narrows the claim, whereas calling it vasoactive leaves the direction of the vascular change unspecified. In short, the term is useful when the relevant fact is that an agent affects blood vessels, but not whether that effect is widening or narrowing.
adjectiveCausing or capable of causing changes in the diameter or tone of blood vessels, especially by affecting the smooth muscle in their walls.
- Causing or capable of causing changes in the diameter or tone of blood vessels.
"The drug has a potent vasoactive effect on the cerebral circulation."
"Several vasoactive mediators help regulate blood flow and vascular tone."
"Because the compound can cause marked vasodilation, it must be administered under close medical supervision."
One word covers both opening and narrowing blood vessels: the direction of the effect is left to the context.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of vasoactive
Vasoactive is an English scientific compound formed from the combining form vaso- and the adjective active. Vaso- ultimately derives from Latin vas, meaning a vessel, while active comes through French from Latin activus, meaning active or doing; vascular, vasculature, and vasomotor share the same Latin root.
Related word forms
How vasoactive is actually used
Chiefly used in medicine and pharmacology. It is broader than either vasodilator or vasoconstrictor because it does not specify the direction of the vascular effect.
Easily confused with vasoactive
A vasoactive substance may either widen or narrow blood vessels, whereas a vasodilator specifically causes them to widen.