Metaraminol hydrochloride, used primarily as a vasoconstrictor in the treatment of HYPOTENSION, is a sympathomimetic agent that acts predominantly at alpha-1 adrenergic receptors.
Metaproterenol also has anti-inflammatory activity. Metaproterenol is a direct-acting sympathomimetic and a β2-adrenergic receptor (β2AR) agonist (IC50: 68 nM).