3 doctors weighed in:

How long would it take for anaphylaxis to occur?

3 doctors weighed in
Dr. David Rosenthal
Internal Medicine - Allergy & Immunology
2 doctors agree

In brief: Varies

Typically within a few minutes and up to 30 min.
It can take longer, but this is rare. Go to the emergency room if you suspect anaphylaxis, and use your Epinephrine auto injector (epipen, auvi-q) if so indicated.

In brief: Varies

Typically within a few minutes and up to 30 min.
It can take longer, but this is rare. Go to the emergency room if you suspect anaphylaxis, and use your Epinephrine auto injector (epipen, auvi-q) if so indicated.
Dr. David Rosenthal
Dr. David Rosenthal
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