⚠️ Like anaphylaxis 🚨 Severe reaction

anaphylactoid

1 9.9

Causing a sudden severe reaction that looks like an allergy but is not caused by it

adjective
/ˌænəfɪˈlæktɔɪd/

Specialized

: anafilactoide

The doctor explained that the rash was due to an anaphylactoid response, which is distinct from a traditional allergic reaction.

Examples

Unlike true anaphylaxis, the symptoms of an anaphylactoid reaction can occur without prior sensitization to the allergen.
The patient experienced an anaphylactoid reaction after receiving the medication, but it was not related to any allergies.
Allergy to local anesthetics has for a long time been considered a pseudo-allergic or anaphylactoid reaction.

Academic text (2007)

Surface Forms

anaphylactoid positive

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. So anaphylactoid means 'like anaphylaxis' and describes something that looks like a sudden, severe allergic attack but is not caused by the immune system.