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Glite Dictionary
⚠️ Like anaphylaxis 🚨 Severe reaction
anaphylactoid

anaphylactoid

1 9.9
A sudden severe reaction that looks like an allergy but is not caused by it
  • noun
  • /ˌænəfɪˈlæktɔɪd/
  • Specialized
translation icon : reacción anafilactoide
  • The patient experienced an anaphylactoid reaction after receiving the medication, which was not due to an allergy.

Examples

  • Anaphylactoid reactions are due to direct mast cell degranulation, whereas anaphylactic reactions are mediated by immunoglobulin E (IgE).

    Academic text (2012)

  • Doctors were concerned about the possibility of an anaphylactoid response, as the symptoms resembled those of anaphylaxis.

  • The common side effects include injection site reaction, fever, hemolytic anemia, thrombocytopenia, anaphylactoid reaction, angioedema, and transfusion reaction due to serum protein reaction.

    Academic text (2007)

  • During the clinical trial, several participants reported anaphylactoid incidents that required immediate medical attention.

Surface Forms

anaphylactoid singular
anaphylactoids plural

Morphology

anaphylactoid = anaphylaxis (semi-transparent) = anaphylact + oid

Formed by adding the suffix '-oid' meaning 'resembling' to the anaphylaxis/anaphylactic stem; the general 'anaphylaxis-like' sense is clear but the precise medical distinction (not immune-mediated) is specialized.

Etymology

Anaphylactoid comes from Greek parts ana- 'against', phylaxis 'protection', and the ending -oid 'like' as in humanoid. An anaphylactoid is a sudden, severe reaction 'like anaphylaxis' but not caused by the immune system.