Table 3.

U.S. Food and Drug Administration approved sublingual tablets (2025)

EoE = Eosinophilic esophagitis; AIT = allergen immunotherapy; IR = index of reactivity (historical European unit used for standardizing SLIT extracts; not equivalent across products); SQ-T = standardized quality tablet (Allergologisk Laboratorium København [ALK] unit to standardize allergen potency, commonly used in Grastek and Oralair); BAU = bioequivalent allergy unit (used in U.S. standardized allergen products); Amb a 1 = major allergen of ragweed (used to standardize Ragwitek); HDM = house-dust mite; SQ-HDM = ALK unit specific for HDM SLIT tablet.