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Doctor insights on: Anaphylaxis Delayed

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Can anaphylaxis have a delayed onset?

Can anaphylaxis have a delayed onset?

Possibly: Anaphylaxis is a life threatening allergy reaction that occurs within minutes to hours of being exposed to the allergen in question. Very rarely one can see anaphylaxis that is delayed and not occur for a couple of hours after exposure. More commonly one sees anaphylaxis that occurs immediately then the symptoms recur hours later -- this is called a biphasic response. ...Read more

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Dr. Kristin Sokol
186 doctors shared insights

Anaphylactic Shock (Definition)

Anaphylaxis is a severe, whole-body allergic reaction to a chemical that has become an allergen. After being exposed to a substance such as bee sting venom, the person's immune system becomes sensitized to it. When the person is exposed to that allergen again, an allergic reaction may occur. Anaphylaxis happens quickly after the exposure, is severe, and ...Read more


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Wasp sting yesterday upper R arm, area very red/swollen/itchy today (3in diam), some wheezing, SOB, dizziness this AM - delayed anaphylaxis?

Wasp sting yesterday upper R arm, area very red/swollen/itchy today (3in diam), some wheezing, SOB, dizziness this AM - delayed anaphylaxis?

Rare but possible: It is exceedingly rare, but not unheard of, to have delayed anaphylaxis to a sting, and the mechanism, of course, is unexplainable (theoretically, perhaps, T-cell mediated anaphylaxis to peptide components). Regardless, you should be seen urgently for a proper assessment of your airway, and treatment as indicated. A referral to allergist should be the next step. ...Read more

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If you have anaphylaxis do you have hives all over your body? Also how quickly does anaphylaxis happen from a food allergy? What if it is delayed?

If you have anaphylaxis do you have hives all over your body? Also how quickly does anaphylaxis happen from a food allergy? What if it is delayed?

Anaphylaxis: You can still have it without hives allover,although generalized hives can be part of anaphylaxis but not necessary,anaphylaxis means acclerated allergic reaction affecting vital system and other body organs,the skin is one of them.Allergic food reactions most of the time are within minutes,rarely hours,beyond that reactions aren't of the anaphylaxis magnitude.Avoid triggers,keep epinephrine handy ...Read more

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What's the best way to stop a food allergy (immediate or delayed, but not anaphylactic shock) reaction?

What's the best way to stop a food allergy (immediate or delayed, but not anaphylactic shock) reaction?

Benadryl (diphenhydramine): If a reaction such as itching happens to a food- an antihistamine like Benadryl (diphenhydramine) may help. However, be careful with food allergies because they can worsen each time you eat that particular food. Therefore the first time you may feel just mild itching and swelling but the next time it could be a full anaphylactic reaction. The safest thing to do is to avoid the food until you get allergy tested. ...Read more

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Why does anaphylaxis occur?

Why does anaphylaxis occur?

Severa Allergic rx: Anaphylaxis is a severe systemic allergic reaction that can result in death. Typical triggers include food, sting, and medications. ...Read more

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How is anaphylaxis diagnosed?

Medical emergency: Anaphylaxis (or an anaphylactic reaction) is a medical emergency due to a severe allergic reaction. Symptoms include shortness of breath, stridorous breathing, cyanosis, cough, etc. This is a medical emergency that requires immediate treatment and/or a 9-1-1 call. ...Read more

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What sort of problem is anaphylaxis?

Allergic reaction: Anaphylaxis is a severe allergic reaction. Common symptoms are difficulty breathing, difficulty swallowing, a rash, skin redness, swelling, shortness of breath, coughing, and several others. It involves the entire body and needs to be treated right away as it can be life threatening. ...Read more

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What are the symptoms of anaphylaxis?

Symptoms can vary: Anaphylaxis is a systemic allergic reaction. That is, symptoms occur not just at the site of exposure, but at other parts of the body as well. Symptoms include widespread hives, flushing, vomiting, diarrhea, wheezing, swelling, and even a dangerous drop in blood pressure (shock). Anaphylaxis is an emergency, so seek immediate medical attention if you feel someone has these symptoms. ...Read more

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I think I am developing anaphylaxis. What should I do?

I think I am developing anaphylaxis. What should I do?

Call 911 : Anaphylaxis is a medical emergency and needs to be treated immediately. The most effective medication is Epinephrine or Adrenalin and the sooner it is administered, the better the outcome. Avoiding the triggering allergen is important. Because anaphylaxis can progress and potentially be fatal, it is important to be evaluated in the ed so appropriate treatment can be administered. ...Read more

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How to treat anaphylaxis?

How to treat anaphylaxis?

911 Emergency: Call 911 immediately. Make sure the person is breathing and maintaining an airway. If an Epipen (epinephrine) is available, use it. Know cpr. ...Read more

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What after effects are there from anaphylaxis?

Itch-> death: Mild cases may be itching, hives, vomiting, and fatigue, severe cases can be life-threatening when respiratory problem or vascular collapse (shock) occurs. If you have this issue, be sure to have Epinephrine with you all at time. Oral antihistamine will not do you any good. Even more important, see an allergist to find out what the trigger is. ...Read more

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Is diarrhea in anaphylaxis rare?

Is diarrhea in anaphylaxis rare?

Less common: Diarrhea can occur in anaphylaxis but it is a less common symptom. ...Read more

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Can insect bite cause anaphylaxis?

Can insect bite cause anaphylaxis?

Yes, but...: ...It's unusual. It's more common from stings, due to bees, wasps, hornets, and some species of ants, because they inject a venom that some people are very allergic to. Susceptible individuals carry an "epi-pen" - an injectible cartridge of epinephrine, which counteracts the anaphylactic reaction. And they never forget to apply insect repellent when they go outside. ...Read more

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Can all allergies cause anaphylaxis?

Can all allergies cause anaphylaxis?

Yes.: Anaphylaxis is often an extreme allergic reaction, but may not always be readily attributable to an allergy. Some people, for example, may experience anaphylaxis from exercise under certain circumstances. Most episodes of anaphylaxis may be linked to allergic sensitization as in the case of insect sting reactions, certain drugs, foods, and in some individuals with severe inhalant allergies. ...Read more

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Will anaphylaxis harm my unborn baby?

Will anaphylaxis harm my unborn baby?

Yes: Anaphylaxis in the mother may cause profound distress in the fetus. Be sure to have a couple of Epinephrine injectors with you at all times and take extra precaution on the triggers. ...Read more

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Can sun urticaria cause anaphylaxis?

Not usually: Solar urticaria is not usually associated with anaphylaxis but cold urticaria may. Perhaps extensive exposure can cause problem but most people would have had a sunburn before further complication develops. ...Read more

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How is anaphylaxis related to hypertension?

It is not: Anaphylaxis is a life threatening systemic allergic reaction that can cause a decrease in blood pressure. Hypertension is a medical condition that causes increased blood pressure. ...Read more

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What are the best treatments for anaphylaxis?

Epinephrine: It comes in an autoinjector, such as epipen, (epinephrine) auviq and generic adrenaclick. You need a prescription for any of them , talk to your doctor. ...Read more

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How does adrenaline work to treat anaphylaxis?

Epinephrine....: Will 1)constrict blood vessels, which raises blood pressure, 2) increase the heart rate, which raises cardiac output, 3) slows vascular leakage associated with anaphylaxis. ...Read more

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Dr. James Lin
1 doctor shared a insight

Severe Allergic Reaction (Anaphylactic Shock) (Definition)

A severe, potentially life-threatening allergic reaction. ...Read more