Allergen immunotherapy injections or “allergy shots” are prescribed for patients with allergic rhinitis (hay fever), allergic asthma, or life-threatening reactions to insect stings. Some studies have shown that it may have a preventive role in allergic children, possibly preventing asthma from developing in some patients with allergic rhinitis. Immunodeficiency treatment would be considered for individuals who have moderate or severe symptoms not adequately controlled by environmental control measures and/or medications. Immunotherapy is also appropriate for individuals who do not wish or cannot safely use only medications and avoidance to treat their allergic rhinitis symptoms.
Allergy shots decrease sensitivity to allergens and often lead to lasting relief of allergy symptoms even after treatment is stopped. This makes it a cost-effective, beneficial treatment approach for many people.
Both children and adults can receive allergy shots. They are not typically recommended for children under age five because of the difficulties younger children may have in cooperating and communicating any adverse symptoms they may be experiencing. When considering allergy shots for an older adult, medical conditions such as heart disease should be taken into consideration and discussed with your Allergist first.
Allergy shots work by decreasing sensitivity to allergens. Your body responds to injected amounts of a particular allergen, given in gradually increasing doses, by developing immunity or tolerance to the allergen.
If allergy shots are successful, maintenance treatment is generally continued for three to five years.
In most cases, the initial 6-to-12-month course of allergy shots is likely to gradually decrease sensitivity to airborne allergens, and the continuation of injections leads to further improvement. The effectiveness of allergy shots appears to be related to the length of the treatment program as well as the dose of the allergen. Some people experience lasting relief from allergy symptoms, while others may relapse after discontinuing allergy shots. Failure to respond to allergy shots may be due to several factors, such as:
Immunodeficiency treatment should be supervised by an immunology specialist, such as an Allergist, in a facility equipped with proper staff and equipment to identify and treat adverse reactions to allergy injections.
A typical reaction is redness and swelling at the injection site. This can happen immediately or several hours after the treatment. In some instances, symptoms can include increased allergy symptoms such as sneezing, nasal congestion, or hives.
Serious reactions to allergy shots are rare. When they do occur, they require immediate medical attention. Symptoms of an anaphylactic reaction can include swelling in the throat, wheezing or tightness in the chest, nausea, and dizziness. Most serious reactions develop within 30 minutes of the allergy injections. Therefore, it is recommended you wait in your doctor’s office for at least 30 minutes after you receive allergy shots.
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