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Anaphylaxis is a potentially life-threatening allergic reaction. The two most common causes of fatal anaphylaxis are allergies to penicillin or allergies to bee stings. Other causes include aspirin, antiinflammatory agents, and other antibiotics, including the classes of cephalosporins and sulfur products. Peanuts and nuts used in many Chinese foods can trigger this reaction. Eggs, milk, shellfish, and the additive called monosodium glutamate (MSG) are other potential causes. Contrast material used for certain radiographs (x-rays) (e.g., intravenous pyelogram(IVP), computed tomography (CT), or magnetic resonance imaging (MRI) can also lead to anaphylaxis in some people.

This video will tell you more about this life-threatening reaction. 

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