10 doctors weighed in:

How long after exposure does it take for anaphylaxis to develop?

10 doctors weighed in
Dr. Alex Martinez
Internal Medicine - Allergy
5 doctors agree

In brief: Within minutes

Anaphylaxis is a severe, potentially life-threatening allergic reaction that involves multiple parts of the body (lungs, heart, skin, & gut).
If you are allergic to a food, medicine, or stinging insect, exposure may cause anaphylaxis quickly. This is why sensitive patients should carry self-injectable Epinephrine with them at all times and not delay using it at the first sign of a reaction.

In brief: Within minutes

Anaphylaxis is a severe, potentially life-threatening allergic reaction that involves multiple parts of the body (lungs, heart, skin, & gut).
If you are allergic to a food, medicine, or stinging insect, exposure may cause anaphylaxis quickly. This is why sensitive patients should carry self-injectable Epinephrine with them at all times and not delay using it at the first sign of a reaction.
Dr. Alex Martinez
Dr. Alex Martinez
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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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Dr. Andrew Murphy
Internal Medicine - Allergy & Immunology

In brief: Immediately

Anaphylaxis is a severe life threatening allergic reaction that occur within seconds to minutes after exposure to the causative agent.

In brief: Immediately

Anaphylaxis is a severe life threatening allergic reaction that occur within seconds to minutes after exposure to the causative agent.
Dr. Andrew Murphy
Dr. Andrew Murphy
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