anaphylaxis
US /ˌæn.ə.fɪlˈæk.sɪs/
UK /ˌæn.ə.fɪlˈæk.sɪs/
1.
a severe, potentially life-threatening allergic reaction that can occur very quickly, characterized by a sudden drop in blood pressure, difficulty breathing, and swelling of the face and throat
:
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The patient went into anaphylaxis after being stung by a bee.
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Always carry an epinephrine auto-injector if you are at risk of anaphylaxis.