Dopamine

Dopamine

(Science: drug) a catecholamine neurotransmitter and hormone (153 D), formed by decarboxylation of dehydroxyphenylalanine (dopa). a precursor of adrenaline and noradrenaline.

pharmacologic action: 1. Precursor of norepinephrine 2. Stimulates dopaminergic, alpha and beta-1 adrenergic receptors: 3. Dopaminergic (1-2 mcg/kg per min): cerebral, renal, and mesenteric vasodilation increase urine output 4. Mixed alpha and beta-1 (2-10 mcg/kg per min): increases cardiac ouput with moderate increase systemic vascular resistance 5. Predominantly alpha (

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