SQ grass sublingual allergy immunotherapy tablet for disease-modifying treatment of grass pollen allergic rhinoconjunctivitis

Background: Allergy immunotherapy is a treatment option for allergic rhinoconjunctivitis (ARC). It is unique compared with pharmacotherapy in that it modifies the immunologic pathways that elicit an allergic response. The SQ Timothy grass sublingual immunotherapy (SLIT) tablet is approved in North America and throughout Europe for the treatment of adults and children (≥5 years old) with grass pollen-induced ARC. Objective: The clinical evidence for the use of SQ grass SLIT-tablet as a disease-modifying treatment for grass pollen ARC is discussed in this review. Methods: The review included the suitability of SQ grass SLIT-tablet for patients with clinically relevant symptoms to multiple Pooideae grass species, single-season efficacy, safety, adherence, coseasonal initiation, and cost-effectiveness. The data from the long-term SQ grass SLIT-tablet clinical trial that evaluated a clinical effect 2 years after a continuous 3-year treatment period were presented in the context of regulatory criteria that define a clinically meaningful effect. Results: This trial demonstrated that the clinical effect of the SQ grass SLIT-tablet is maintained, which is also supported by the immunologic findings. Conclusion: Therefore, the SQ grass SLIT-tablet has an indication as a disease-modifying therapy in Europe, and a sustained effect is recognized in the United States.