epi·neph·rine | \ˌe-pə-ˈne-frən \
variants: or less commonly epinephrin

Definition of epinephrine 

: a crystalline sympathomimetic hormone C9H13NO3 that is the principal blood-pressure raising hormone secreted by the medulla of the adrenal glands, is prepared from adrenal extracts or made synthetically, and is used medicinally especially to stimulate the heart during cardiac arrest and to treat life-threatening allergic reactions

called also adrenaline

Examples of epinephrine in a Sentence

Recent Examples on the Web

Symjepi contains the same active ingredient, epinephrine, as EpiPen, which is used to treat anaphylaxis caused by insect bites and foods, among other allergic reactions. Peter Loftus, WSJ, "Novartis Injects Itself Into Planned Rollout of EpiPen Competitor," 2 July 2018 Drugmakers have faced growing pressure over the past year to rein in price hikes, particularly for older drugs such as insulin and epinephrine allergy injections, which have become more expensive without fundamentally changing. Jeremy Olson, chicagotribune.com, "Son's death pushes Minnesota mom into fight against high, rising drug prices," 17 May 2018 Anaphylaxis requires treatment with an epinephrine injector like an Epipen and a trip to the ER. Korin Miller, SELF, "Southwest Airlines Is Finally Getting Rid of In-Flight Peanuts," 11 July 2018 Faced with this rival and growing resistance from insurers, Kaleo last year reintroduced Auvi-Q, its original epinephrine drug. Jared S. Hopkins And Andrew Martin, chicagotribune.com, "When Chicago's 'pharma bros' show up, drug prices can go through the roof," 6 Apr. 2018 The drivers will be trained to identify the symptoms of an allergic reaction and be able to administer epinephrine by a cartridge injector, commonly known as an EpiPen. Ruth Bruno, courant.com, "Seven New State Laws That Took Effect July 1," 3 July 2018 Fortune EpiPen Rival Novartis’s Sandoz unit is acquiring the rights to sell an epinephrine injector called Symjepi, which is a rival to Mylan’s EpiPen. Alan Murray, Fortune, "Hello AMLO, EU Retaliation, Stocks Stumble: CEO Daily for July 2, 2018," 2 July 2018 The Dutch team ruled out that the performance improvement came from changes in other hormones that can affect metabolism, such as cortisol, epinephrine and norepinephrine. Melissa Healy, latimes.com, "Deep brain stimulation may offer treatment for type 2 diabetes, study suggests," 26 May 2018 Fatal reactions are more likely to occur if epinephrine is needed but not given right away. Hillary Gordon, Md, Philly.com, "ER visits rising for kids with allergies," 30 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'epinephrine.' 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 epinephrine

1899, in the meaning defined above

History and Etymology for epinephrine

International Scientific Vocabulary epi- + Greek nephros kidney — more at nephritis

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Last Updated

24 Aug 2018

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Time Traveler for epinephrine

The first known use of epinephrine was in 1899

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More Definitions for epinephrine


ep·i·neph·rine | \ˌe-pə-ˈne-frən \

Kids Definition of epinephrine

: a hormone that causes blood vessels to narrow and the blood pressure to increase


variants: also epinephrin \ˌep-ə-ˈnef-rən \

Medical Definition of epinephrine 

: a colorless crystalline feebly basic sympathomimetic hormone C9H13NO3 that is the principal blood-pressure-raising hormone secreted by the adrenal medulla, is prepared from adrenal extracts or made synthetically, and is used medicinally especially as a heart stimulant, as a vasoconstrictor (as to treat open-angle glaucoma and life-threatening allergic reactions and to prolong the effects of local anesthetics), and as a bronchodilator

called also adrenaline

More from Merriam-Webster on epinephrine

Britannica English: Translation of epinephrine for Arabic Speakers

Britannica.com: Encyclopedia article about epinephrine

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