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an adrenergic with potent vasoconstrictor properties; used as the hydrochloride salt for various purposes: topically to decongest nasal and laryngeal mucous membranes or to produce mydriasis without cycloplegia; intravenously to maintain blood pressure during spinal and inhalation anesthesia, to treat vascular failure in drug-induced shock, shocklike states, and hypotension, to prolong spinal anesthesia, and to treat paroxysmal supraventricular tachycardia; and orally as a component of combination antihistaminic-decongestant preparations.
phenylephrine/phen·yl·eph·rine/ (-ef´rin) an adrenergic used as the hydrochloride salt for its potent vasoconstrictor properties.
An adrenergic drug, C9H13NO2, that is a powerful vasoconstrictor and is used to relieve nasal congestion, dilate the pupils, and maintain blood pressure during anesthesia.
phenylephrineA SYMPATHOMIMETIC drug used as eye drops to dilate the pupils for ophthalmic examination of the interior of the eyes. A brand name is Minims phenylephrine.
an α-adrenergic stimulant used as the hydrochloride salt as a nasal decongestant and in ophthalmology to produce mydriasis.