Anaphylaxis
(Severe Allergic Reaction)
Revising Medical Author: Jerry R. Balentine, DO, FACEP
Revising Medical Editor: Melissa Conrad Stöppler, MD
Introduction to anaphylaxis
Anaphylaxis refers to a rapidly developing and serious
allergic reaction that affects a number of different areas
of the body at one time. Severe anaphylactic reactions can
be fatal. Most people experience allergy
symptoms only as a minor annoyance. However, a small number of people are
susceptible to a reaction that can lead to shock or even death.
Anaphylaxis is often triggered by substances that are
injected or ingested and thereby gain access into the blood
stream. An explosive reaction involving the skin, lungs,
nose, throat, and gastrointestinal tract can then result.
Although severe cases of anaphylaxis can occur within
seconds or minutes of exposure and be fatal if untreated,
many reactions are milder and can be ended with prompt
medical therapy.
Next: What does anaphylaxis mean? »
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Last Editorial Review: 5/30/2007