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Why I Have Allergies, Why They Make Me Sick, and What I Can Do About Them - Part 2

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Welcome to the National Allergy E-Mail Newsletter! This month we complete our series contributed by Lois Turley, RN entitled Why I Have Allergies, Why They Make Me Sick, and What I Can Do About Them. We know you'll appreciate Lois' experience as an allergy nurse. Lois also runs a very helpful website called AllergyNursing.com where you can find many additional resources. The information in this newsletter comes from Lois' training as well as research she has done specifically for this newsletter. It's important to note that as scientific research continues on this subject, new discoveries will certainly be made. What is presented below is some of the current understanding of this subject within the medical community.

If you've missed Part 1 of this series or you'd like to read any of our past newsletters, you can find archived issues of all of them on our website. In the coming months we'll have more educational articles about the aggravating factors behind allergy, asthma, and sinus problems and helpful things you can do to find relief. Each newsletter will also feature a valuable coupon and contain exclusive product specials for subscribers only. To top it off, every month we're giving away an Austin Air HM-400 Air Purifier, valued at $400, to one lucky subscriber!

Sincerely,

The National Allergy Newsletter Team
http://www.nationalallergy.com/

 

Why I Have Allergies, Why They Make Me Sick, and What I Can Do About Them

Part 2: What can I do about my allergies?

The First Line of Defense: Avoidance

Coupon Image The first recommendation I always make to people is to avoid the allergens to which they are allergic. If you can totally avoid the things you are allergic to, then you can eliminate all remaining action steps. Unfortunately, it is almost impossible to totally avoid allergens since they are a prominent part of our environment. But we can take some very helpful steps to prevent exposure to many of them.

For example, when people tell me they wake up with allergy symptoms, allergy testing often shows that it's because they have been breathing in dust mite allergen all night! I can help them eliminate a lot of their problem by recommending they purchase mite-proof mattress, box spring and pillow covers. Dust mites feed on our dead skin cells that slough off in our mattresses and pillows. By simply covering our beds and pillows with mite-proof encasings, we will be putting up a major barrier that dust mite allergen can't penetrate. Even for those without dust mite allergies, mite-proof covers can also protect against cat dander, mold, or other allergens that settle in our mattresses and pillows.

Our climate is very humid during these summer months, so I also recommend a dehumidifier for patients with environmental or mold allergies. By reducing the humidity in our homes to around 50%, we can make it difficult for mold and dust mites to survive. Don't forget to have your air ducts checked by a professional air cleaning service also. Mold growth or buildup of pet dander and other allergens in the furnace and ducts can keep allergens continually circulating in your home. Be sure to select a good quality furnace filter also. A furnace filter designed to remove pet hair, mold, smoke particles, bacteria, and viruses can go a long way toward making the air you breathe cleaner.

Other measures I recommend include laundering all bedding in hot, soapy water (or adding a cold-water mite killing agent); using HEPA air cleaners; dusting frequently; using easy to clean window treatments; and weekly vacuuming (be sure your vacuum has a good HEPA filter also). If you're allergic to pollens, avoidance is a little harder. Just walk outside your door and you're exposed. But simple measures such as wearing a mask when mowing the lawn or gardening, and keeping the windows closed in your home and car can help.

For those with mild allergies, this first line of defense may be enough. But often medication must be added to the treatment plan.

The Second Line of Defense: Medications

Antihistamines and leukotriene modifiers (sometimes called antileukotrienes) block the histamine and leukotrienes that are released when antibodies unite with mast cells. Antihistamines are used for some allergic skin reactions such as hives, as well as respiratory allergies such as hayfever and are available as prescriptions and over the counter. If you are going to have a skin test for allergies, be sure to stop taking any type of antihistamine a few days prior to the test. If present in your system, they could block the reaction in the skin so the test would appear to show no allergies when in fact you might have some (also called a false negative). Leukotriene modifiers are used to treat allergic hayfever and asthma. They may also be helpful in treating angioedema (generalized swelling which can cut off the airways). Since it is the release of histamine that causes the positive reaction in skin testing, leukotriene modifiers usually do not need to be stopped prior to skin testing. Read product labeling carefully as some antihistamines can cause drowsiness and should not be taken when driving or operating machinery. Leukotriene modifiers usually have minimal or no side-effects.

Oral decongestants help to reduce congestion and stuffiness in the sinuses. People with high blood pressure should not take these decongestants because they can elevate blood pressure. They can also cause some people to feel jittery. Occasionally they may cause a rapid heartbeat, and if this occurs you should stop taking the decongestant and consult your physician. Over the counter nasal decongestant sprays are not as likely to cause side effects as oral decongestants because less is absorbed. However, if you experience dizziness or a rapid heart beat while using over-the-counter nasal sprays, you should stop them immediately and check with your physician. Prolonged use of over-the-counter nasal decongestant sprays can cause a rebound effect in which the spray itself initiates the congestion. This results in increased symptoms and dependency on the spray to overcome the rebound effect it causes. Never use over-the-counter nasal decongestant sprays for more than a few days without your doctor's advice.

Prescription-strength nasal steroid sprays and a nasal antihistamine spray are also available. These help reduce the inflammation caused by the allergic response. At recommended doses, nasal steroid sprays are usually considered safe for even long-term use, since only very minute amounts are absorbed systemically. They usually donƒt cause the side effects of oral decongestants. Never use more than the prescribed dose of these sprays - usually one to two sprays in each nostril once a day. To minimize systemic absorption, always use the lowest prescribed dose that works for you. If one spray works, don't use two! Many doctors recommend saline nasal irrigation to help moisten and cleanse the nose and lower sinuses.

Asthma is often associated with allergies, and asthma attacks can be triggered by airborne allergens. Asthma medications are usually one of two types, a long-term control medication or a quick-relief or arescue„ medication. Orally inhaled steroids, which reduce inflammation, are an example of a long-term asthma medication. Many physicians recommend them as a baseline treatment for asthmatic patients. Bronchodilators are often prescribed to relax smooth muscles in the airways. They may be used as long-term medications, but often they are used as quick-relief rescue medications. They can sometimes cause the heart to beat irregularly or too fast.

Cromolyn sodium prepares the mast cell to prevent the release of histamine and leukotrienes. It is sometimes recommended to help prevent allergies prior to exposure. Cromolyn sodium should not be used to treat an allergic attack. To be effective, it must be used several days or weeks prior to exposure to the allergen. Cromolyn sodium is considered safe when used as directed. However if you experience any unusual symptoms while using it, you should stop it immediately and check with your physician.

There are other treatments and medications that are sometimes prescribed. Always follow your doctor's recommendations carefully and share with your physician any questions or concerns you may have.

The Third Line of Defense: Allergy Injections

Also known as allergy shots, these are small doses of the actual allergen to which you are allergic that are injected into the skin. The study of how allergy injections work is very interesting. It is also a bit confusing, because there is still much research going on in this area. It might be helpful to review Part 1 of this series for a detailed explanation of allergic response as a refresher prior to reading this next section.

One widely accepted theory is that, for reasons yet unknown, when allergens are injected into the skin rather than inhaled as normal, the body doesn't recognize the offending allergen in the same way. Instead of developing IgE antibodies as usual, the body begins developing IgG antibodies toward the allergens. It is thought that these IgG antibodies actually block the IgE antibodies from uniting with the receptor sites on mast cells. If you recall from Part 1 of this series, it is the union of IgE antibodies and mast cells that initiates allergy symptoms. It is also thought that eventually allergy injections may result in a decrease in IgE, though it is not known for sure how this works.

The goal of allergy injections (also known as immunotherapy) is to be able to reduce or eliminate the need for medications, and after several years even the shots themselves. Many people find they can be exposed to moderate amounts of the offending allergen with less or no symptoms after they have been on allergy shots for awhile. For example, they may be able to mow the lawn or pet their cat without a major allergy attack. However, some people do find that at least some of their symptoms eventually return after shots are discontinued. Always talk with your doctor before changing your medication regimen or stopping your injections. This is especially important if you have asthma.

Conclusion

"Three basic therapeutic techniques should be considered in treating either seasonal or perennial allergic rhinitis:
  1. avoidance of the offending allergens
  2. use of appropriate drugs
  3. immunotherapy (injection treatments to effect hyposensitization or desensitization)
When feasible, avoidance is the preferred form of treatment, since it both relieves symptoms and eradicates the cause of the difficulty."
JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION Nov. 27 1987-Vol. 258, No. 20, Pp. 2854, 2855; M. Kaliner, MD, P. Eggleston, MD and K. Mathews, MD
For many people, a combination of avoidance, medications, and allergy injections are needed to control their symptoms in the beginning. Once under control, some patients have been able to gradually eliminate medications through the supervision of their physician. Eventually some patients are able to stop allergy shots with only minimal symptom return. Even then, we still recommend they use environmental control measures when possible to provide optimal symptom control and less exposure to the allergen. Less exposure means less challenge to the immune system, thus it may mean less chance that the allergy symptoms will return when shots are discontinued. You should always talk with your physician about which approaches are best for you.

If you have specific questions about allergies, e-mail us at newsletter-questions@nationalallergy.com and we'll do our best to help.

 

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