Definition of phentolamine in English:


Syllabification: phen·tol·a·mine
Pronunciation: /fenˈtäləˌmēn


  • A synthetic compound used as a vasodilator, especially in certain cases of hypertension.
    More example sentences
    • Agitation and anxiety can be controlled with benzodiazepines, and hypertension with labetalol, phentolamine, or nitroprusside.
    • Epinephrine may interact with alpha- and beta-adrenergic blocking agents such as propranolol and phentolamine.
    • Severe hypertension can be treated with labetalol, phentolamine, nitroprusside, or similar agents.


1950s: from phen- + tol(yl) (an isomeric cyclic radical derived from toluene) + amine.

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