Norepinephrine, DL-

**Semantic type:** Pharmacologic Substance

**Definition:** A synthetic phenylethylamine that mimics the sympathomimetic actions of the endogenous norepinephrine. Norepinephrine acts directly on the alpha- and beta-adrenergic receptors. Clinically, norepinephrine is used as a peripheral vasoconstrictor that causes constriction of arterial and venous beds via its alpha-adrenergic action. It is also used as a potent inotropic and chronotropic stimulator of the heart mediated through its beta-1 adrenergic action.

**Synonyms:** - (+/-)-Noradrenaline - (.+-.)-Noradrenaline - (.+-.)-Norepinephrine - 1,2-benzenediol, 4-(2-amino-1-hydroxyethyl)-, (+/-)- - Arterenol - NORADRENALINE, (+/-)- - Noradrenaline - Norepinephrine - Norepinephrine - noradrenaline - norepinephrine