norepinephrine
noun
nor·epi·neph·rine
ˈnȯr-ˌe-pə-ˈne-frən 
: a monoamine C8H11NO3 that is a neurotransmitter in postganglionic neurons of the sympathetic nervous system and in some parts of the central nervous system, is a vasopressor hormone of the adrenal medulla, and is a precursor of epinephrine in its major biosynthetic pathway
Examples of norepinephrine in a Sentence
Recent Examples on the Web
Duloxetine works by affecting two key neurotransmitters in the brain: serotonin and norepinephrine.
—
Joseph Epstein, Newsweek, 10 Dec. 2024
Duloxetine belongs to the class of medications called selective serotonin and norepinephrine reuptake inhibitors (SNRIs) that help increase levels of serotonin and norepinephrine in the brain.
—Stephanie Brown, Verywell Health, 19 Dec. 2024
SNRIs work by blocking this absorption or inhibiting it, allowing more serotonin and norepinephrine to remain active and available in the brain and transmit easier from nerve to nerve.
—Mary Walrath-Holdridge, USA TODAY, 13 Dec. 2024
Serotonin plays a role in mood regulation, anxiety, and emotional stability, while norepinephrine affects pain perception and alertness.
—Joseph Epstein, Newsweek, 10 Dec. 2024
See all Example Sentences for norepinephrine 
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Joseph Epstein, Newsweek, 10 Dec. 2024
Duloxetine belongs to the class of medications called selective serotonin and norepinephrine reuptake inhibitors (SNRIs) that help increase levels of serotonin and norepinephrine in the brain.
—Stephanie Brown, Verywell Health, 19 Dec. 2024
SNRIs work by blocking this absorption or inhibiting it, allowing more serotonin and norepinephrine to remain active and available in the brain and transmit easier from nerve to nerve.
—Mary Walrath-Holdridge, USA TODAY, 13 Dec. 2024
Serotonin plays a role in mood regulation, anxiety, and emotional stability, while norepinephrine affects pain perception and alertness.
—Joseph Epstein, Newsweek, 10 Dec. 2024
See all Example Sentences for norepinephrine
Dictionary Entries Near norepinephrine
Cite this Entry
“Norepinephrine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/norepinephrine. Accessed 22 Jan. 2025.
Copy CitationKids Definition
norepinephrine
noun
nor·epi·neph·rine
ˈnȯ(ə)r-ˌep-ə-ˈnef-rən
: a hormone that causes blood vessels to contract and helps to transmit nerve impulses in the sympathetic nervous system and in some parts of the central nervous system
Medical Definition
norepinephrine
noun
nor·epi·neph·rine
ˌnȯr-ˌep-ə-ˈnef-rən
-rēn
-rēn
: a catecholamine C8H11NO3 that is the chemical means of transmission across synapses in postganglionic neurons of the sympathetic nervous system and in some parts of the central nervous system, is a vasopressor hormone of the adrenal medulla, and is a precursor of epinephrine in its major biosynthetic pathway
called also arterenol, noradrenaline
see levophedLove words? Need even more definitions?
Merriam-Webster unabridged
Share