Phytochemical Dictionary: A Handbook of Bioactive Compounds from Plants, Second Edition
4-(2-Aminoethyl)benzene-1,2-diol; 4-(2-Aminoethyl)pyrocatechol; 3,4-Dihydroxyphenethylamine; α-(3,4-Dihydroxyphenyl)-β-aminoethane; 3-Hydroxytyramine
High concentrations are found in banana peel (6–12 per g fresh-weight), and in Musa sapientum (Musaceae). It is present in mescal buttons, Lophophora williamsii (Cactaceae), broom, Cytisus scoparius (Leguminosae), and Hermidium alipes (Nyctaginaceae).
A neurotransmitter in the brain; dopamine levels are reduced in patients with parkinsonism.
It is a direct acting sympathomimetic with effects on both α- and β-adrenergic receptors. Also, it increases cardiac output. The main use is in treatment of shock, but it is inactive orally and must be given by dilute intravenous infusion.
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