Abstract
For patients whose asthma is controlled and who have a low risk for future exacerbations, current guidelines recommend gradually stepping down pharmacotherapy to identify the lowest dose needed to maintain control. This review article will discuss the benefits and risks of step down in asthma management and the different strategies of achieving step down with particular focus on allergen immunotherapy (AIT). A literature search was conducted to identify studies that assessed the effect of AIT on asthma step down and evaluated this and asthma control as one of the outcomes. Six studies were identified: 2 subcutaneous and 4 sublingual AIT studies. Five studies assessed house dust mite-induced asthma, whereas 1 study focused on birch-induced seasonal asthma. Regarding house dust mite-induced asthma, the AIT studies reviewed suggest that individuals with moderate rather than mild asthma are the patients who are more likely to benefit from the addition of AIT for their asthma condition. The potential value of AIT is likely to be in enabling successful step down of the inhaled corticosteroid dose in Global Initiative for Asthma step 3 or 4. It is important to further explore this effect so that affected individuals can benefit from this treatment.
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