anaphylaxis

Noun

anaphylaxis (countable and uncountable, plural anaphylaxes)

1. Extreme sensitivity to a substance such as a foreign protein or drug.
2. A severe and rapid systemic allergic reaction to an allergen, causing a constriction of the trachea, preventing breathing; anaphylactic shock.
   • “Anyone who has experienced or witnessed an anaphylaxis reaction knows it can be very stressful deciding when to inject epinephrine to themselves or a child and often delay,” Dr. Jonathan Spergel, chief of the allergy program at Children’s Hospital of Philadelphia, said in a news release from ARS...2024 August 9, Meg Tirrell, “First nasal spray epinephrine drug for emergency allergic reactions gets FDA approval”, in CNN
   • He said a bite could send someone into anaphylaxis, which is a narrowing of the airways and lowering of blood pressure, within minutes.2025 August 16, Rylee Kirk, quoting William Sutton, “Hiker in Tennessee Who Picked Up a Venomous Snake Dies After Being Bitten”, in The New York Times, New York, N.Y.: The New York Times Company...