Nasal Allergic rhinitis Adult: Nasal Treatment and prophylaxis of allergic rhinitis Adults: 100 mcg (2 sprays) in each nostril once daily, increased to 200 mcg into each nostril once daily if needed. Maintenance: 50 mcg in each nostril daily. In patients with a known seasonal allergen that precipitates nasal symptoms of seasonal allergic rhinitis, prophylaxis with Mometasone Nasal Spray is recommended 2 to 4 weeks prior to the anticipated start of the pollen season. Nasal polyps: 100 mcg (2 sprays) in each nostril once daily; may increase to bid after 5-6 wk if needed. Inhalation Asthma prophylaxis: Mild to moderate: Initially, 400 mcg once daily in the evening. Maintenance: 200 mcg once to bid. Severe: Initially, 400 mcg bid, then titrated to lowest effective dose once controlled. Child: Mild to moderate: Initially, 400 mcg once daily. Maintenance: 200 mcg once to bid. Severe: Initially, 400 mcg bid, then titrated to lowest effective dose once controlled.