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Doctor insights on: How Long Do Allergies Usually Last

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How long does an alavert allergy usually last?

How long does an alavert allergy usually last?

Variable: It all depends. What were the allergic symptoms....Skin, breathing, GI tract, cardiac. Usually an allergic reaction can be between 2 hours to 7 days based on the reaction and many other factors. ...Read more

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Dr. John Chiu
2,268 doctors shared insights

Allergies (Definition)

Essentially allergies occur when your immune system goes crazy and decides to has to fight against things it should be ignoring. The immune system of people without allergies simply ignores the pollen in the air or the dander on their cat while an allergic person's immune system creates cells to fight against the pollen or dander. The allergic reaction causes the ...Read more


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How long do the symptoms of a dust mite allergy usually last for?

How long do the symptoms of a dust mite allergy usually last for?

Hard to say: Acute symptoms due to a specific exposure can last for one to two hours; less if treated immediately with antihistamines. But dust mite allergen is very common in the environment, so continued exposure throughout the night and day can cause continuous symptoms. If taking an antihistamine on a regular basis doesn't help, see your primary physician or allergist. ...Read more

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Dr. Rashed Hasan
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28 years in practice
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How long does symptoms last from allergy pill?

How long does symptoms last from allergy pill?

Varies: If you are asking about side effects from allergy medicine (?Drowsiness), it can vary according to the medicine you took, the dose and how your body handles it. Since many allergy medicines are taken once a day, it could take a day or so for the effects to wear off. ...Read more

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Why do allergy shot injections last for only about 10 years? Is there anything else that lasts longer?

Why do allergy shot injections last for only about 10 years?  Is there anything else that lasts longer?

We do not know: Some patients get lifelong relief from allergy shots, while others never seem to be able to stop them. Most patients get a least 10 years of relief from 3-5 years of shots. ...Read more

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Dr. Rashed Hasan
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28 years in practice
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Food allergy symptoms, how long will it last?

Food allergy symptoms, how long will it last?

Less than a day: If the symptoms you are asking about are really due to food allergy, they should begin almost immediately after eating the food and resolve in several hours but may last a day. ...Read more

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How long will claratin last in the body to help with allergies?

How long will claratin last in the body to help with allergies?

24 hours or less: Claritin, and its generic form - Loratadine - generally lasts about 17 hours. Thus, taking it in the morning (which is safe to do as it is non-drowsy) should get you through the majority of the day. If it does not, talk to your doctor about adding a topical nasal steroid spray. ...Read more

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How long does raw shrimp allergies last?

How long does raw shrimp allergies last?

Long, long time: Shrimp allergies tend to persist compared to other food allergies. Even when cooked, the major shrimp allergen is resistant to heat. Shrimp (and other shellfish) are more likely to cause severe allergic reactions like anaphylaxis. The major shrimp allergen called tropomyosin (in the meat/muscle) can cross react with house dust mite. The reaction has nothing to do with iodine. ...Read more

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How long do seasonal allergies last, help?

Seasonal allergy: As the terminology says, it would last until the season is over. I suppose what you refer to as seasonal allergy is seasonal allergic rhinoconjunctivitis or hay fever like diseases. You should check with your local allergist to see if it is the case and which seasons you are likely to be affected. ...Read more

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How long will a milk allergy last in a baby and will it go away?

How long will a milk allergy last in a baby and will it go away?

Unpredictable: Most infants outgrow milk protein allergy by the age of 2 years--more importantly, about 80% of children will outgrow allergy to milk by the age of 5. See an allergist for appropriate testing and recommendations on when to reintroduce milk into your child's diet. ...Read more

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How long does lobster allergy last?

How long does lobster allergy last?

Life long usually.: Most shellfish allergy is life long. Repeat testing and possible oral challenge may help determine if the allergy has resolved. ...Read more

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Dr. Rashed Hasan
Board Certified, Pediatric Critical Care
28 years in practice
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