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Doctor insights on: How Long Do Allergies Usually Last

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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

Dr. John Chiu
2,479 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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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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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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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 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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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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Received a depomedrol shot today 80mg, in my bottom, for allergies & sinus issues. When will it kick in and how long will it last?

Received a depomedrol shot today 80mg, in my bottom, for allergies & sinus issues. When will it kick in and how long will it last?

About 6 hrs: You should get some effects in about 6 hrs but the peak effect takes a day or two In general, I would advise against getting cortisone shots for a sinus infection especially for someone with anxiety & BP issues since nasal steroid likely works better with no serious side effects. If you have frequent sinusitis and allergies, best to consult an allergist. ...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