Exploring global research trends in sublingual immunotherapy of allergic rhinitis: a comprehensive bibliometric analysis

AIMS: Sublingual immunotherapy (SLIT) is a well-established, safe, and patient-friendly treatment for allergic rhinitis. This study aims to provide a comprehensive bibliometric analysis of global research trends and emerging hotspots in SLIT for allergic rhinitis. METHODS: Relevant publications were sourced from the Web of Science Core Collection (1993-2024). VOSviewer, CiteSpace, and the R "bibliometrix" package were used to visualize research collaborations, leading contributors, and thematic developments. RESULTS: This analysis of 696 publications on SLIT for allergic rhinitis reveals a dynamic, collaborative field. The USA, China, and Italy led production, with the University of Genoa as the top institution. Research is organized into six clusters: immunological mechanisms, clinical efficacy, epidemiology/guidelines, pediatric research, disease classification, and real-world evidence.The focus has evolved over two decades from initial clinical efficacy studies toward understanding underlying immune mechanisms (highlighted by recent keyword bursts like "dendritic cells"), biomarker discovery, and specialized pediatric applications. There is also a strengthened emphasis on long-term management and real-world effectiveness. CONCLUSION: SLIT research is diversifying, marked by a growing emphasis on immunology, personalized and pediatric approaches, and practical outcomes, providing a robust foundation for optimizing future therapy.