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Brand Name, Dosage Format and Strength
Kastair  10 mg  Tablet


Age Group

Once daily dose of Montelukast (Kastair)

for Allergic Rhinitis, Asthma and/or  

Exercise-induced Asthma

4 mg

5 mg

10 mg

Children 6 mos to 5 yrs

1 tab



             6 to 14 yrs


1 tab


Adults and children 15 yrs and older


2 tabs

1 tab


Or, as prescribed by a physician

Directions for Use:

  • For patients with allergic rhinitis:
    • The time of administration may be individualized to suit patient needs.
    • Take everyday, at about the same time each day, or, as prescribed by a physician.
  •  For patients with asthma with or without coexisting allergic rhinitis:
    • The dose should be taken in the evening to obtain simultaneous peak plasma concentration and peak airway reactivity in the morning.
    • Take at regular intervals (i.e., daily) to be therapeutically effective, even if you have no asthma symptoms, or, as prescribed by a physician.
  •  For the prevention of exercise-induced bronchoconstriction:
    • Take at least 2 hrs before exercise.
    • Do not take an additional dose within 24 hrs of a previous dose.
    • Do not take an additional dose to prevent exercise-induced bronchoconstriction if you are taking Montelukast daily for chronic asthma or allergic rhinitis.  Consult a physician about treatment of exercise-induced bronchoconstriction.
  • May be taken with or without food.
  • Montelukast (Kastair EZTab) 4 mg or 5 mg tablet can be dissolved in the mouth or chewed before swallowing.
  • For younger children (6 mos to 2 yrs old), Montelukast (Kastair EZTab)  4 mg tablet can be crushed and:
      • administered directly in the mouth
      • dissolved in 5 mL (1 tsp) of cold or room temperature breast milk or baby formula
      • mixed with a spoonful of one of the following soft foods at cold or room  temperature: applesauce, mashed carrots, rice, or ice cream
  • The tablet should not be crushed until ready for use.
  • The entire dose of the crushed tablet must be administered within 15 min.  The crushed tablet should not be stored for future use if mixed with food or dissolved in breast milk or baby formula.
  • The crushed tablet should not be dissolved in liquid other than breast milk or baby formula.  However, liquids can be taken after administration.

Last Update: Aug 12, 2011

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