[ fen-l-ef-reen, -rin, feen- ]
/ ˌfɛn lˈɛf rin, -rɪn, ˌfin- /

noun Pharmacology.

an alpha-adrenergic stimulant, C19H13NO2, used chiefly as a nasal decongestant.

Origin of phenylephrine

First recorded in 1945–50; phenyl + (epin)ephrine Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for phenylephrine


[ fĕn′əl-ĕfrēn, fē′nəl- ]


An adrenergic drug that is a powerful vasoconstrictor and is used to relieve nasal congestion, dilate the pupils, and maintain blood pressure during anesthesia.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.