Patient Information Asthma Asthma and allergy | Allergy and Asthma |
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Allergy plays an important role in asthma, as one of the major factors associated with the cause and persistence of asthma. Around 8 in 10 people with asthma have positive allergy test results. Allergy and asthma are very commonAllergy is very common in Australia and New Zealand, affecting around 4 in 10 people. Asthma is also common - affecting around 1 in 4 children, 1 in 7 teenagers and 1 in 10 adults. Globally, the prevalence of allergy and asthma is continuing to increase, particularly in developed countries, such as Australia and New Zealand. What is allergy?Allergy occurs when the immune system in a person reacts to allergens, which are substances in environment that do not cause problems for most people. This reaction leads to inflammation (redness and swelling) that causes allergic diseases, which can affect different parts of the body, such as:
Allergens are mostly found in house dust mites, pollen, pets, moulds, some antibiotic medicines, insect stings or bites, latex (natural rubber) and foods. What is asthma?People with asthma experience a narrowing of the airways in the lungs, which obstructs the flow of air into and out of the lungs. This narrowing can be reversed using medications and people with asthma can therefore lead normal, active lives. Asthma is most easily recognised by the following symptoms:
Triggers for asthma include allergens, infections, exercise, cold air, or changes in temperature and cigarette smoke. There may, however, be other causes for these symptoms, so you should always see your doctor for advice. How does allergy play a role in asthma?There are two main ways in which allergy plays an important role in asthma:
How do you find out if allergy is playing a role in your asthma?After taking your medical history, your doctor may perform SKIN PRICK TESTS or BLOOD (RAST) TESTS FOR ALLERGEN SPECIFIC IGE to demonstrate the presence of antibodies to one or several allergens. These tests are medically and scientifically proven. Your doctor may decide to refer you to an Allergy Specialist for testing, particularly in the case of suspected severe allergies, including those to foods, medicines or insects. Further information on ALLERGY TESTING is available on the ASCIA website. Unorthodox so-called allergy tests are unprovenThere are several methods of unorthodox so-called 'tests' for allergy which have no scientific basis, are unreliable and hence have no role in the clinical assessment of allergy and asthma. These tests include cytotoxic food testing, Vega testing, kinesiology, iridology, pulse testing, Alcat testing and Rinkel's intradermal skin testing. Further information on UNORTHODOX METHODS is available on the ASCIA website. Effective management of asthma involves control of allergyIt is essential to determine if allergies are an important factor in your asthma. If you can reduce the amount of causative allergen/s to which you are exposed, your asthma will improve. Once you suspect that certain substances will cause an allergic reaction, you should obviously try and avoid or remove the offending allergen(s) whenever possible. Further information on ALLERGEN AVOIDANCE is available on the ASCIA website. Medication for asthma and allergyPeople with asthma should have a regularly reviewed ASTHMA ACTION PLAN, developed in consultation with their doctor, including asthma medications (preventers and relievers) and how these may need to be increased or decreased. If you have asthma and untreated hay fever, it can be more difficult to control asthma symptoms. NASAL CORTICOSTEROIDS are the most effective long term medication for hay fever. Like preventer medication for asthma they need to be used each day to be effective, in controlling asthma and lessening the need for asthma medication. NON-SEDATING ANTIHISTAMINES are used to treat hay fever symptoms and are safe for people with asthma. MEDICATIONS WHICH CAN CAUSE PROBLEMS for people with asthma include aspirin, non-steroidal anti-inflammatory medicines and beta blockers. Some ‘natural' treatments such as Echinacea and royal jelly can cause life threatening allergic reactions (anaphylaxis) in some people with asthma. It is important to advise your pharmacist and doctor of any medications or ‘natural' treatments you are taking. Immunotherapy and asthmaSPECIFIC ALLERGEN IMMMUNOTHERAPY is a long term treatment which alters the immune system's response to allergens. It involves the administration (usually by injection) of gradually increasing amounts of allergen extracts and has been shown to improve asthma control in some people. Further information on IMMUNOTHERAPY is available on the ASCIA website. Allergy and asthma preventionIf a parent has allergies and/or asthma their children have a higher risk of developing allergies and/or asthma. Although effective treatments are available it makes sense to try to prevent allergies and asthma from developing. Based on current evidence, the following suggestions can be provided:
Even if you carry out these suggestions you may not be able to prevent children from developing allergies. Further information
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© ASCIA 2006
Content Last updated 1 January 2006 |
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| Last Updated ( Tuesday, 20 November 2007 ) |
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