Rupatifen Fumarate Capsules in Patients With Seasonal Allergic Rhinitis

Inclusion Criteria: * Aged from 18 to 65 years inclusive, no restriction on gender. * Clinical diagnosis shall comply with Chinese Guidelines for the Diagnosis and Treatment of Allergic Rhinitis (Revised 2022) issued by Rhinology Group, Chinese Society of Otorhinolaryngology Head and Neck Surgery, Chinese Medical Association; documented medical history of seasonal allergic rhinitis ≥2 years (subject's self-reported history is acceptable). Prior to randomization, subjects shall test positive for one or more locally prevalent seasonal allergens (e.g., tree pollen, grass pollen). Any of the following allergen testing results are recognized: skin prick test (SPT), intradermal test or serum specific immunoglobulin E (sIgE). Specific immunoglobulin E (sIgE) results obtained within 1 year prior to randomization demonstrating positivity to relevant seasonal allergens are acceptable. Clinical manifestations shall meet the following: a) Symptoms: ≥2 of paroxysmal sneezing, rhinorrhea, nasal pruritus and nasal congestion; total daily symptom duration ≥1 hour, with possible accompanying ocular manifestations including lacrimation, ocular pruritus and conjunctival hyperemia. b) Signs: typical pale and edematous nasal mucosa with watery nasal discharge. c) Allergic symptoms manifest seasonally in spring and/or autumn, and subjects are in an active symptomatic episode at screening. * At screening, reflective Total Nasal Symptom Score (rTNSS) ≥6 points, nasal congestion subscore ≥2 points, …