epinephrine
noun
epi·neph·rine
ˌe-pə-ˈne-frən 
variants
or less commonly epinephrin
: 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
For severe allergic reactions (anaphylaxis), epinephrine is required for treatment.
—
Julie Marks, Verywell Health, 10 Mar. 2025
However, the new nasal spray has a solvent that gets between cells in the nose and helps the body absorb epinephrine.
—Adrianna Rodriguez, USA TODAY, 9 Aug. 2024
Treatment for severe reactions includes using epinephrine and calling 911 for emergency medical help.
—Corinne Savides Happel, Verywell Health, 5 Mar. 2025
None of the children in the immunotherapy group had a severe enough reaction when consuming peanut protein at home to need a shot of epinephrine, and just one needed the medication during a visit to the study site.
—Linda Carroll, NBC News, 10 Feb. 2025
See All Example Sentences for epinephrine
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Julie Marks, Verywell Health, 10 Mar. 2025
However, the new nasal spray has a solvent that gets between cells in the nose and helps the body absorb epinephrine.
—Adrianna Rodriguez, USA TODAY, 9 Aug. 2024
Treatment for severe reactions includes using epinephrine and calling 911 for emergency medical help.
—Corinne Savides Happel, Verywell Health, 5 Mar. 2025
None of the children in the immunotherapy group had a severe enough reaction when consuming peanut protein at home to need a shot of epinephrine, and just one needed the medication during a visit to the study site.
—Linda Carroll, NBC News, 10 Feb. 2025
See All Example Sentences for epinephrine
Cite this Entry
“Epinephrine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/epinephrine. Accessed 11 Apr. 2025.
Copy CitationMedical Definition
epinephrine
noun
epi·neph·rine
variants
also epinephrin
: a colorless crystalline 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 to stimulate the heart during cardiac arrest and to treat life-threatening allergic reactions
called also adrenaline
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