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anaphylactic reactionAn acute Hypersensitivity reaction due to exposure to a previously encountered Antigen. The reaction may include rapidly progressing Urticaria, respiratory distress, vascular collapse, systemic Shock, [..]
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anaphylactic reaction[an-uh-fer-lak-tik] [ree-ak-shun] An immediate and severe allergic reaction, which needs urgent medical attention.
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anaphylactic reactiona serious and sometimes fatal allergic reaction to an antigen characterized by respiratory symptoms, fainting, itching, and hives
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anaphylactic reaction<immunology> A serious, often life-threatening allergic reaction that is characterised by low blood pressure, shock (poor tissue perfusion) and difficulty breathing. (27 Sep 1997)
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anaphylactic reactionHypotension with one or more of: rash, dyspnoea, stridor, wheezing, angioedema, pruritus, urticaria, during or within 24 hrs of transfusion.
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