According to the American Academy of Allergy Asthma and Immunology, allergy shots, or immunotherapy, are a long-term treatment to reduce symptoms of allergies for patients with allergic rhinitis, allergic asthma, conjunctivitis or stinging insect allergy. WebMD explains that although allergy shots may not cure allergies completely, they decrease the amount of reactions that occur.
According to the American Academy of Allergy Asthma and Immunology, allergy shots contain a small amount of the allergen that the patient is allergic to. Shots are administered to the patient weekly during the build-up phase until they reach the maintenance phase. The build-up phase is essential to allow the immune system to gradually acclimate to the allergen.