Observational study of the safety of an ultra-rush sublingual immunotherapy regimen to treat rhinitis due to house dust mites.

Background: Ultra-rush regimens for administering sublingual immunotherapy to patients with allergies are becoming more widespread. We aimed to assess treatment safety for patients with allergic rhinitis with or without asthma caused by Dermatophagoides house dust mites.

Methods: This observational study at 5 Spanish centers included 218 patients aged 4-64 years, of whom 117 were women and 122 were under 15 years old.