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Drug Allergy | Medical Condition | Medical Knowledge Base

Knowledge Base/Medical Condition/Drug Allergy

Drug Allergy

A drug allergy occurs when the body's immune system overreacts to a substance (allergen) in a medicine that the person has taken, which triggers an allergic reaction. Symptoms include hives or welts, rash, swelling, redness, and blisters. A drug allergy may also cause serum sickness (characterized by hives, joint pain...

Also Known As

Drug Allergydrug allergy

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Last updated: Jan 7, 2026

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