allergic reaction meaning

Noun: allergic reaction

1. Hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity
   - allergy

Derived forms: allergic reactions

Type of: hypersensitivity reaction

Encyclopedia: Allergic reaction

[Medicine]
Altered reactivity to an antigen,which can result in pathologic reactions upon subsequent exposure to that particular antigen.

Examples

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1. severe allergic reactions may accompany administration of the drug.
2. cases of allergic reaction by shenmai injection
3. one case of allergic reaction by calcii glucouas vd
4. allergic reactions caused by puerarin : 4 case reports
5. please stop taking the medication if allergic reaction occurs