1 Definition of anaphylactic shock

Meaning of anaphylactic shock: A severe and sometimes life-threatening immune system reaction to an antigen that a person has been previously exposed to.

A severe and sometimes life-threatening immune system reaction to an antigen that a person has been previously exposed to. The reaction may include itchy skin, edema, collapsed blood vessels, fainting, difficulty in breathing, and death.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.