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Doctor insights on: What Is The Average Time A Person Can Have An Allergic Reaction

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What is the average time a person can have an allergic reaction?

What is the average time a person can have an allergic reaction?

Variable: This is highly variable depending on the allergic reaction. Major reactions can occur immediately up to 8 hours after the fact. Minor reactions can have a delayed hypersensitivity occurring 24-72 hours later. ...Read more

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Dr. John Chiu
2,656 doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


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For what length of time can an allergic reaction in a child last?

For what length of time can an allergic reaction in a child last?

Allergic reaction: You do not specify the type of the allergic reaction. Acute ones are severe but do not last long, delayed reactions can last for a few days, you need to provide more specific symptoms for an accurate answer. ...Read more

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If someone starts a rash after being on claritin, (loratadine) might it be from the drug? How likely is it for a person to be allergic to an allergy drug?

If someone starts a rash after being on claritin, (loratadine) might it be from the drug? How likely is it for a person to be allergic to an allergy drug?

Uncommon: Could also be something in the additives or coloring of the pill. Have you tried other antihistamines and had the same reaction. If so, then it might be a drug class allergy. If not, then it is a particular brand. ...Read more

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Is it possible for a person to have an alleregic reaction to a TB skin test, if so what are the symptoms?

Is it possible for a person to have an alleregic reaction to a TB skin test, if so what are the symptoms?

Yes: In rare cases, the reaction to the skin test can be so severe as to cause skin peeling and even an ulceration. This is not an allergy. Theoretically you can have an allergy to the skin test, but it is exceedingly rare. ...Read more

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When you develop an allergy after multiple exposure to a medication what are the chances it will be anaphylactic rather than a rash?

When you develop an allergy after multiple exposure to a medication what are the chances it will be anaphylactic rather than a rash?

Less likely : Allergic reactions to medications can vary widely, but most reactions are not life threatening. A majority of allergic reactions involve a rash and itching. Anaphylaxis is more likely if a person knows that he/she is already allergic, and the medication is taken anyway. ...Read more

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Is it possible for a person to have an allergic reaction to another person chewing tobacco?

Is it possible for a person to have an allergic reaction to another person chewing tobacco?

Tobacco allergy: Unlikely but perhaps the smell bothers you. Or the spit. Tobacco allergy is rare but is documented. ...Read more

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What does it mean if a patient has a history of allergic reactions to bee stings?

What does it mean if a patient has a history of allergic reactions to bee stings?

Worrisome issue: This can be something as minor as localized swelling, hives, or a frank anaphalaxis where the person is at risk of death. If major, that person should be carrying an epipen, (epinephrine) self administered Epinephrine to use as initial treatment until they can get to a hospital for additional care. ...Read more

Dr. John Chiu Dr. Chiu
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If I had an allergy to a certain medication, could the reaction stay the same or progress over a course of 10mos? I think this is what's wrong with me

Dr. John Chiu Dr. Chiu
3 doctors agreed:
If I had an allergy to a certain medication, could the reaction stay the same or progress over a course of 10mos? I think this is what's wrong with me

Unclear question.: Once you are allergic, the reaction tends to be more intense 10 months later. Having said that , some people do lose their penicillin allergy after no contact with the drug for >5 years. However sulfa allergy will likely last forever. The response depends on drug . Many drug reactions are from intolerance which will likely persist. Your allergist will be the one to help you sort out these issues. ...Read more

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What exactly happens to a person during an allergic reaction? Can you get treatment for them?

What exactly happens to a person during an allergic reaction? Can you get treatment for them?

Allergic reactions: Allergic reactions come about when a particle or substance gets your immune system to react. This causes your body to produce hitamine from blood cells and often there is a reaction between your immunoglobins and the offending agent that will result in variou swelling and redness. Treatment for most acute allergic reaction includes and antihitamine and often a steroid. ...Read more

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What is a good way to determine if reaction was a true allergic reaction to ibuprofen?

What is a good way to determine if reaction was a true allergic reaction to ibuprofen?

What true: Its related to aspirin. If hive. Itching. Trouble breathing then its allergy , if acidity like symtoms then its not. ...Read more

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What is the difference between a sunburn and an allergic reaction? Is it possible to have both?

What is the difference between a sunburn and an allergic reaction? Is it possible to have both?

Can have both: There is an entity related to sun sensitivity where people develop severe dermatitis or urticaria from sun exposure. A burn hurts more, an allergic reaction mostly itches, . ...Read more

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How likely is it for a person to have an allergy to penicillin?

How likely is it for a person to have an allergy to penicillin?

Depends on reaction: True allergy to penicillin is actually rare, although many people mistakenly believe they are allergic to penicillin. If there is any doubt, there are skin testing protocols available that could answer the question. I would recommend seeing an allergist for this testing, and then possibly an oral challenge to penicillin if the skin tests are negative. ...Read more

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What is the best antihistimane to take for an allergic reaction resulting in hives and or a rash?

What is the best antihistimane to take for an allergic reaction resulting in hives and or a rash?

Any OTC: Antihistamines are good. Benadryl, (diphenhydramine) taken every 6 hours may cause drowsiness, so do not drive. You can use loratadine, zyrtec or Allegra . If severe enough, may need steroids. Best to be evaluated by an allergist. May need to carry epi-pen if severe. ...Read more

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What are the risks of an allergy shot for a person with severe asthma? I had bad reaction to the allergy test which caused bronchitis.

What are the risks of an allergy shot for a person with severe asthma? I had bad reaction to the allergy test which caused bronchitis.

Allergy shots: Patients with uncontrolled asthma are at somewhat higher risk of systemic reactions to allergy shots. Once asthma is controlled with medications most asthmatics are able to receive allergy shots without difficulty assuming that they are closely monitored. Since allergy injections lessen allergic sensitivity over time most allergic asthmatics will see improvement in their condition. ...Read more

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For what type of reaction would we take a baby with a food allergy to the hospital?

For what type of reaction would we take a baby with a food allergy to the hospital?

Food allergies: The problem with allergies, is that it can progress pretty quickly from mild to severe very quickly. My kids have food allergies, and even as a doctor, it scares me! if you are not sure, do not hesitate! get your child to an emergency room as quicly as possible, as every minute counts. Having Epinephrine pens will buy you time as well. Please discuss this with your child's docotr as well. ...Read more

Dr. John Chiu
1,052 doctors shared insights

Allergic Reaction (Definition)

A sensitivity to substances called allergens that come into contact with the skin, nose, eyes, respiratory tract, or gastrointestinal tract. They can be breathed into the ...Read more