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A member asked:
How much time does it take for anaphylaxis to kick in after a reaction?
5 doctors weighed in across 2 answers
Anaphylaxis: Anaphylaxis can occur from seconds up to approximately 6 hrs after an allergic exposure ( food, sting, medication , etc).
Answered 11/28/2017
3.9k views
Anaphylaxis onset: Almost always within minutes. So fast that if one is at risk of a repeat event of anaphylaxis, an automatic injector of epinephrine should be carried at all times. Fatalities occurred from delaying treatment with epinephrine. However, a new form of delayed anaphylaxis from reactions to 'red meat' has been discovered. Happens in those with frequent tick bites. I've seen several. Get an allergist.
Answered 12/9/2014
3.5k views
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