Pediatric rhinitis treatment duration depends on severity: ① mild allergic rhinitis: 1–2 months, ② moderate chronic rhinitis: 2–4 months, ③ chronic rhinitis with sinusitis: 3–6 months, ④ recurrent prevention: 1–2 month dose every spring/autumn. Significant symptom improvement is usually felt within 2–4 weeks of starting. After improvement, taper gradually with maintenance dosing for 1–2 months to prevent recurrence.