Response to sublingual immunotherapy with grass pollen extract: Monotherapy versus combination in a multiallergen extract

Improvement in multiple relevant outcomes strongly suggests that SLIT with timothy extract alone was effective; however, the results for symptom and medication scores were not significant. The differences between multiple allergen SLIT and placebo only in skin sensitivity to timothy suggest a reduction in SLIT efficacy in this group. However, further studies are required to confirm these observations.