norepinephrine

noun
nor·​epi·​neph·​rine | \ˈnȯr-ˌe-pə-ˈne-frən \

Definition of norepinephrine 

: 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

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There’s also lofexidine, a non-opioid treatment that reduces the release of norepinephrine, a neurotransmitter that is thought to play a role in many of the symptoms of opioid withdrawal. Houston Chronicle, "How to “live long and prosper”," 7 July 2018 Though the exact cause of ADHD isn’t clear, one prevalent theory is that neurotransmitters like dopamine and norepinephrine, which are critical for thinking and attention, are imbalanced in people with this condition. Christina Stiehl, SELF, "10 Things ADHD Is—and 3 It Isn't," 11 Mar. 2018 Antidepressants are meant to balance brain chemicals called neurotransmitters, which include serotonin, dopamine, and norepinephrine. Martine Thompson, SELF, "8 Things You Should Know Before Going on Antidepressants for the First Time," 30 Mar. 2018 Chest pain, spasms, and elevated levels of the stress hormones norepinephrine and epinephrine are a few of the potential reactions. Blake Bakkila, Health.com, "7 Things You Need to Know to Survive a Breakup," 9 Feb. 2018 This produces a stress response in your body—specifically, your brain’s hypothalamus triggers your sympathetic nervous system to release norepinephrine (aka adrenaline) and cortisol (a stress hormone) to get you out of harm’s way. Brittany Risher, SELF, "This Is When to See a Mental Health Professional About Your Anxiety," 2 Feb. 2018 If the data is perceived as something that causes angst, the adrenal gland produces a hormonal secretion that results in the release of catecholamines, especially norepinephrine and epinephrine. NBC News, "How Impostor Syndrome Is Holding You Back at Work," 26 Oct. 2017 Some benefit was found for another type of antidepressant — serotonin and norepinephrine reuptake inhibitors or SNRIs — but the researchers described the results as inconsistent. Linda Searing, Washington Post, "For excessively anxious youths, the success of treatment options varies," 4 Sep. 2017 Depression previously has been linked to imbalances of the neurotransmitters serotonin, norepinephrine and dopamine. Carrie Wells, baltimoresun.com, "University of Maryland scientists research gene linked to depression," 29 July 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'norepinephrine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of norepinephrine

1937, in the meaning defined above

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The first known use of norepinephrine was in 1937

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More Definitions for norepinephrine

norepinephrine

noun
nor·​epi·​neph·​rine | \ˌnȯr-ˌep-ə-ˈnef-rən, -rēn \

Medical Definition of norepinephrine 

: 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

More from Merriam-Webster on norepinephrine

Britannica.com: Encyclopedia article about norepinephrine

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