ABOUT US ALLERGIES PATIENTS SCIENCE NEWS CENTER CAREERS Find your location FAQ How long does allergen immunotherapy take? HOW LONG DOES ALLERGEN IMMUNOTHERAPY TAKE? Allergen immunotherapy (AIT), also known as desensitisation, retrains the immune system to build a tolerance to the allergens responsible for the allergy. Once the tolerance is built, the symptoms experienced each time the patient is exposed to the allergens in the environment begin to decline. These improvements to the symptoms may continue to be felt even once the patient is no longer taking AIT. Retraining the immune system may require several years (usually 3 to 5 years or seasons) of immunotherapy. Respecting the treatment duration is needed to achieve lasting relief from your allergy symptoms. AIT is the only treatment capable of inducing tolerance to allergens. © 2021 Stallergenes Greer Site Map Terms & Conditions Modern Slavery Act Statement Contact Cookie Policy Cookies Reject and continue STALLERGENES GREER uses technical cookies essential for the functioning of the site as well as audience measurement cookies. You can accept audience measurement cookies by clicking on “Accept” or reject them by clicking on “Reject and continue”. You can change your mind at any time by clicking on “Cookies Management” and manage your preferences by clicking on “Set your preferences”. For more information, please read our Cookie Policy Set your preferences Accept