Anaphylaxis: Anaphylaxis is a very severe, often fatal allergic reaction. Anaphylaxis can occur to virtually any allergen, but hypersensitivity to nuts and hymenoptera (bees, wasps) are the most notorious. Epi-pens contain epinephrine, a life saving medication to quickly reverse allergic reactions such as anaphylaxis.
Answered 9/14/2014
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