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Definition of Immediate allergy
1. Noun. An allergic reaction that becomes apparent in a sensitized person only minutes after contact.
Exact synonyms: Atopic Allergy, Atopy, Type I Allergic Reaction
Generic synonyms: Allergic Reaction, Allergy
Generic synonyms: Allergic Reaction, Allergy
Medical Definition of Immediate allergy
1. A type I allergic reaction; so called because in a sensitised subject the reaction becomes evident usually within minutes after contact with the allergen (antigen), reaches its peak within an hour or so, then rapidly recedes. See: immediate reaction, anaphylaxis. Compare: delayed allergy. (05 Mar 2000)