Norepinephrine hydrochloride, (±)- (DL-Norepinephrine Hydrochloride) is a vasoconstrictor, cardiac stimulant, α- and β-sympathomimetic agent. DL-Norepinephrine hydrochloride is an adrenergic drug. Norepinephrine is an endogenous catecholamine that is the neurotransmitter at sympathetic postganglionic fibers. It has potent beta1- and alpha-stimulating effects. In contrast to epinephrine, norepinephrine has only minor effects on beta2 receptors. The clinical effects of norepinephrine administration are mainly increased cardiac index and increased vascular (systemic and pulmonary) resistance. Several adult studies have suggested that norepinephrine is useful in increasing SVR in patients with hyperdynamic or vasodilatory septic shock that is not responsive to dopamine or epinephrine. Additionally, it can augment coronary blood flow by increasing systemic diastolic pressure, at the expense of increasing afterload.