: 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

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Examples of catecholamines are epinephrine (adrenaline) and norepinephrine (noradrenaline).3 However, ephedrine also comes with serious risks, such as heart attacks, seizures, stroke, and sudden death.1 Caffeine: Caffeine may have similar metabolic effects as ephedra. Ross Phan, Pharmd, Bcacp, Bcgp, Bcps, Verywell Health, 17 Jan. 2025 This category includes the depressants Valium, Xanax and Ativan, among others. Antipsychotics, a class of drug that addresses psychosis symptoms in a variety of ways. Antidepressants, which relieve symptoms of depression by affecting neurotransmitters such as serotonin, norepinephrine and dopamine. Ashley Bradford, The Conversation, 10 Jan. 2025 This reaction can continue, helping to produce norepinephrine as well. Caitlin Pagán, Verywell Health, 31 Jan. 2025 This oscillatory norepinephrine release proved crucial to the operation of the glymphatic system. Ars Technica, 20 Jan. 2025 See all Example Sentences for norepinephrine 

Word History

First Known Use

1937, in the meaning defined above

Time Traveler
The first known use of norepinephrine was in 1937

Dictionary Entries Near norepinephrine

Cite this Entry

“Norepinephrine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/norepinephrine. Accessed 19 Feb. 2025.

Kids Definition

norepinephrine

noun
: 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

: 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 levophed

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