Hypersensitivity, Immediate
| Medical Definition: |
Hypersensitivity reactions which occur within minutes of exposure to challenging antigen due to the release of histamine which follows the antigen-antibody reaction and causes smooth muscle contraction and increased vascular permeability. |
| Guide Notes: |
/chem ind: coord with DRUG HYPERSENSITIVITY or specifics |
Hypersensitivity, Immediate Categories.
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Anaphylaxis - An acute hypersensitivity reaction due to exposure to a previously encountered antigen. The reaction may include rapidly progressing urticaria, respiratory distress, vascular collapse, systemic shock, and death. |
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Food Hypersensitivity - Gastrointestinal disturbances, skin eruptions, or shock due to allergic reactions to allergens in food. |
Hypersensitivity, Immediate Medical Definitions and Terms
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 CANADIAN
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