Leukotriene Modifiers - Allergic Rhinitis Share this page: Last updated April 2020 Leukotriene Modifiers: These medications are used for relief of allergic rhinitis symptoms. Generic Name Brand Name Class Use Dosage Montelukast Singulair 4 mg Chewable 4 mg Oral Granules 5 mg Chewable 10 mg Tablet Singulair Website Leukotriene Antagonist Seasonal allergic rhinitis (age 2 and older) Perennial allergic rhinitis (age 6 months and older) Age 6 to 23 months: Use granules, 4mg daily. Age 2 to 5: One oral granule packet or 4 mg chewable tablet once a day. Age 6 to 14: One 5 mg tablet once daily. Age 15 and above: One 10 mg tablet once daily. Find out more about hay fever. Share this page: