anaphylaxis

noun
ana·​phy·​lax·​is | \ -ˈlak-səs How to pronounce anaphylaxis (audio) \
plural anaphylaxes\ -​ˌsēz How to pronounce anaphylaxes (audio) \

Definition of anaphylaxis

1 : hypersensitivity (as to foreign proteins or drugs) resulting from sensitization following prior contact with the causative agent

Examples of anaphylaxis in a Sentence

Recent Examples on the Web

Without urgent treatment, anaphylaxis can be deadly. Sarah Jacoby, SELF, "Some Rx Bars Have Been Recalled Due to an Undeclared Allergen," 16 Jan. 2019 In severe cases, you may be treated with epinephrine (a medication that can reverse anaphylaxis) and then possibly a steroid (like cortisone) to reduce inflammation and get the reaction under control, FARE says. Korin Miller, SELF, "4 Signs You Might Be Allergic to Sugar," 24 Dec. 2018 And for people with severe food allergies, coming into contact with the allergen may cause a life-threatening reaction known as anaphylaxis. Zoe Weiner, SELF, "American Airlines Will Let Passengers With Nut Allergies Board First," 9 Nov. 2018 Actually, adrenaline is the most important antidote to treat anaphylaxis. Ronald S. Litman, Philly.com, "Should I worry about my child being allergic to anesthesia?," 9 July 2018 This can manifest as hives, itching, and watery eyes or anaphylaxis, a severe reaction that can include critical drops in blood pressure, difficulty breathing and possibly even swelling of the throat. Ronald S. Litman, Philly.com, "Should I worry about my child being allergic to anesthesia?," 9 July 2018 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 In more severe cases, anaphylaxis sets in, leading to trouble breathing, rapid heart rate, a dip in blood pressure and other dangerous symptoms. Amber Dance, Washington Post, "Peanut allergy is one of the most severe food allergies. New therapies might help.," 12 May 2018 This can cause mild annoyances like hives or itchy eyes, or life-threatening issues like anaphylaxis, where blood pressure plummets and airways start swelling shut. Umair Irfan, Vox, "It’s not your imagination. Allergy season gets worse every year.," 28 Apr. 2018

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

circa 1905, in the meaning defined at sense 1

History and Etymology for anaphylaxis

New Latin, from ana- + prophylaxis

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Last Updated

3 Feb 2019

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Time Traveler for anaphylaxis

The first known use of anaphylaxis was circa 1905

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More Definitions for anaphylaxis

anaphylaxis

noun
ana·​phy·​lax·​is | \ ˌan-ə-fə-ˈlak-səs How to pronounce anaphylaxis (audio) \
plural anaphylaxes\ -​ˌsēz How to pronounce anaphylaxes (audio) \

Medical Definition of anaphylaxis

1 : hypersensitivity (as to foreign proteins or drugs) resulting from sensitization following prior contact with the causative agent

More from Merriam-Webster on anaphylaxis

Britannica English: Translation of anaphylaxis for Arabic Speakers

Britannica.com: Encyclopedia article about anaphylaxis

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