octopamine

A sympathomimetic amine; a false neurotransmitter produced by noradrenergic neurons in the presence of monoamine oxidase inhibitors. SYN: norsympatol, norsynephrine.

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oc·to·pa·mine äk-'tō-pə-.mēn, -mən n an adrenergic biogenic amine C₈H₁₁NO₂ that is found in some invertebrates and vertebrates and has been used to treat hypotension

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oc·to·pam·ine (ok″to-pamґēn) a sympathomimetic amine thought to result from inability of the diseased liver to metabolize tyrosine; it is called a false neurotransmitter, since it can be stored in presynaptic vesicles, replacing norepinephrine, but has little effect on postsynaptic receptors. It is used as the hydrochloride salt in treatment of hypotension.