phenylephrine
noun
phen·yl·eph·rine ˌfe-nᵊl-ˈe-ˌfrēn 
-frən
: a sympathomimetic agent C9H13NO2 that is used in the form of its hydrochloride as a vasoconstrictor, a mydriatic, a nasal decongestant, and by injection to raise the blood pressure
Example Sentences
Recent Examples on the Web Anything containing phenylephrine, which is the active ingredient in many popular over-the-counter nasal decongestants, may be particularly harmful to those with cardiovascular issues. 
Zee Krstic, Good Housekeeping, 11 Jan. 2021 Each pod has acetaminophen to relieve pain and reduce fevers, dextromethorphan HBr to quiet coughs and phenylephrine HCl to clear nasal passages. Good Housekeeping Editors, Good Housekeeping, 16 Oct. 2019
Zee Krstic, Good Housekeeping, 11 Jan. 2021 Each pod has acetaminophen to relieve pain and reduce fevers, dextromethorphan HBr to quiet coughs and phenylephrine HCl to clear nasal passages. Good Housekeeping Editors, Good Housekeeping, 16 Oct. 2019 Word History
Etymology
phenyl + epinephrine
First Known Use
circa 1947, in the meaning defined above
Medical Definition
phenylephrine
noun
phen·yl·eph·rine ˌfen-ᵊl-ˈef-ˌrēn, -rən
: a sympathomimetic agent with vasoconstrictive properties that is used in the form of its hydrochloride C9H13NO2·HCl especially as a nasal decongestant and mydriatic and to raise blood pressure
Note: Trademarks for preparations containing phenylephrine include Actifed and Neo-Synephrine.