dopamine + metaraminol

Dopamine + metaraminol is a combination of two sympathomimetic agents used to manage acute hypotension, particularly in critical care and perioperative settings. Dopamine acts as a catecholamine neurotransmitter and vasopressor, stimulating dopaminergic receptors at low doses, beta-1 adrenergic receptors at moderate doses (increasing cardiac output), and alpha-1 adrenergic receptors at higher doses (causing vasoconstriction). Metaraminol is primarily an alpha-1 adrenergic receptor agonist with some indirect action via norepinephrine release and minor beta-adrenergic effects; it increases peripheral vascular resistance and blood pressure. The combination may be used when rapid hemodynamic support is required, leveraging both direct vasoconstrictive effects (metaraminol) and inotropic/vasopressor actions (dopamine).