NCIt definition : An indirect-acting sympathomimetic amine with adrenergic property. Hydroxyamphetamine,
when applied topically to the eye, stimulates the release of norepinephrine from postganglionic
adrenergic nerves resulting in the stimulation of both alpha and beta adrenergic receptors.
Local alpha stimulatory effects include dilation of the pupil, increased flow of aqueous
humor, and vasoconstriction; whereas beta stimulatory effects include relaxation of
the ciliary muscle and a decreased production in aqueous humor.;