HAL Allergy completes large Phase III study: New research results in house dust mite allergy

Leiden, Netherlands, Duesseldorf, Germany, June 15, 2026 – House dust mite allergy is one of the most common causes of persistent allergic rhinitis and can be associated with asthma. Many millions of people around the world are affected and may experience a considerable impact on sleep, concentration, and daily activities.

HAL Allergy has now completed a large Phase III trial in adult patients with house dust mite allergy, in which an investigational product was compared with placebo. After one year of treatment, the analysis showed statistically significant improvements in allergy symptoms and disease-related quality of life compared with the placebo group.

The trial was a randomized, double-blind, placebo-controlled study conducted at multiple centers in several European countries. A total of 691 patients with moderate-to-severe allergic rhinitis/rhinoconjunctivitis induced by house dust mites received treatment as part of the study – some of whom also had asthma.

“The completion of this study is an important step in further developing treatment options for patients with house dust mite allergy,” said Philip Boehme, MD, CEO of HAL Allergy Group. “We will now make the results available to the responsible authorities and to the scientific community so that they can be assessed in the context of all available data.”

“This Phase III trial adds new data to the field of allergen immunotherapy in house dust mite allergy,” said Prof. Oliver Pfaar, MD, Chair of the Rhinology and Allergology Section of the Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital of Philipps-Universität Marburg, Germany. “The detailed findings should be interpreted in the context of the overall study and will be presented to healthcare professionals in scientific publications and at congresses.”

HAL Allergy plans to submit the full dataset to the relevant regulatory authorities and to publish the main results in a peer-reviewed scientific journal in the second half of 2026.

About HAL Allergy

HAL Allergy is a leading European specialty pharmaceutical company dedicated to allergies and related diseases, with more than 60 years of expertise. Its portfolio spans the full allergy care pathway – from diagnostics and allergen immunotherapy (SCIT and SLIT) for house dust mite, pollen, and insect venom allergies to biological therapies.