Allergic rhinitis (AR) induced by house dust mites (HDMs) is a highly prevalent but often underdiagnosed and undertreated/untreated chronic disease. It often has a negative impact on sleep, work, leisure activities, and health-related quality of life. Allergen immunotherapy is a proven, safe treatment for respiratory allergies.
To assess the efficacy and safety of a 300 index of reactivity (IR) sublingual tablet formulation of Dermatophagoides pteronyssinus:Dermatophagoides farinae 1:1 extract in adolescents (aged ≥12) and adults with moderate-to-severe HDM-induced AR.
In a Phase III, international, double-blind, placebo-controlled, randomized clinical trial, participants received approximately 12 months of treatment with placebo or the 300°IR tablet. The primary endpoint was the average total combined score (aTCS) during 4 weeks at the end of the treatment period.
1,607 participants were randomized, and 1,476 (including 555 (37.6%) with concomitant mild controlled asthma at inclusion) comprised the full analysis set. Over the primary evaluation period, the least squares mean aTCS in the 300°IR group (3.62) was significantly lower (p<0.0001) than in the placebo group (4.35), with a relative least squares mean difference of -16.9% [95% confidence interval: -24.0%; -9.2%]. All pre-specified secondary endpoints were consistently improved in the 300°IR group, relative to placebo. The 300°IR tablet was generally well tolerated. Treatment-related adverse events (mainly mild or moderate local reactions) were reported for 51.0% of the patients in the 300°IR group and 14.9% in the placebo group.
The 300°IR sublingual HDM tablet is an effective, safe treatment for HDM-induced AR. (NCT02443805, EudraCT 2014-004223-46) CLINICAL IMPLICATIONS: A 300 index of reactivity sublingual tablet formulation of Dermatophagoides pteronyssinus:Dermatophagoides farinae extract is a safe, effective treatment for moderate-to-severe house-dust-mite-induced allergic rhinitis.

Copyright © 2020. Published by Elsevier Inc.

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