Allergy tablets under the tongue may cut hay fever drug use for years, massive real-world study suggests

This study looks back at health records from over 46,000 people in Denmark and Sweden with allergic rhinitis (hay fever), some of whom also have asthma. It compares those who used SQ sublingual immunotherapy (SLIT) tablets — a daily tablet placed under the tongue containing grass pollen or house dust mite allergens — to similar people who did not. The goal is to see whether long-term use of these tablets reduces the need for symptom-relieving allergy and asthma medications and lowers the risk of asthma attacks or lung infections.