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Sagot :
Answer: The body’s immune system overreacting to a usually harmless substance.
A reaction to some medications, such as itching, swelling, or trouble breathing is an example of hypersensitive reaction (drug allergy).
What is drug allergy?
It a an allergic reaction of the body towards a medicine.
What kind of reaction is a drug allergy?
It is a kind of hypersensitive reaction.
What is a hypersensitive reaction?
It is an exaggerated response of a body towards an immunogen.
Why is it caused?
When drugs bind to some immune cells such as T cells, they cause a release of some chemicals which causes an allergic reaction in the body.
To learn more about drug allergy and hypersensitive reaction here,
https://brainly.com/question/13000105
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