vasoactive

Short definition from Wiktionary

Adjective

1. 1
   Active on vessel walls, that is, causing either constriction or dilation of a blood vessel, thus affecting hemodynamics (blood flow). Vasoactive substances may be endogenous (for example, endogenous angiotensin, vasopressin, or epinephrine) or exogenous (for example, pharmaceutical vasopressin or epinephrine).