NCIt related terms : NOREPINEPHRINE BITARTRATE ANHYDROUS;
NCIt definition : The anhydrous bitartrate salt form of levarterenol, the levorotatory isomer of norepinephrine
with a vasoconstrictor effect. Levarterenol binds to alpha and beta-1 receptor sites
of sympathetic effector cells, thereby causing vasoconstriction of the radial smooth
muscle of the arteries, arterioles, and veins and increasing myocardial contractility,
heart rate, automaticity, and artrioventricular (AV) conduction, respectively. Stimulation
of the beta-2 adrenergic receptors causes bronchiolar and vascular smooth muscle dilatation.;