Application-based market taxonomy shows allergic rhinitis as the single-largest outlet, absorbing ~46 % of 2023 global sales, driven by rising pollen indices and OTC switching that widens patient access. Chronic urticaria follows with 22 %, where fast symptom control reduces emergency visits, justifying twice-daily high-dose use. Acute allergic reactions (including food, drug, and insect-bite emergencies) represent 18 %; here auto-injector partnerships with EMS systems secure premium pricing and sticky volume. Off-label dermatologic pruritus, ocular allergy, and peri-operative prophylaxis split the residual 14 %, collectively growing at mid-single digits as physicians repurpose on-hand inventory rather than add new SKUs, keeping absolute dollar growth modest but margins intact.