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Chest. 2007 Jan;131(1):180-6.

The effect of montelukast on bronchial hyperreactivity in preschool children.

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Pediatric Pulmonology Unit, Meyer Children's Hospital, Rambam Medical Center, PO Box 9602, Haifa, 31092 Israel.



The effect of montelukast therapy on bronchial hyperreactivity (BHR) as measured by the methacholine challenge test in preschool children has not yet been reported.


To determine the effect of montelukast (4 mg/d) on BHR as evaluated by a provocative concentration of a substance causing a 20% fall in FEV(1) (PC(20)) values in preschool asthmatic children.


A total of 26 preschool children (8 girls) aged 3.3 to 6.0 years (mean [+/- SD] age, 4.7 +/- 0.8 years) with mild asthma.


Double-blind randomized, placebo controlled, crossover study. Each child received 4 weeks of treatment with 4 mg of either montelukast or placebo separated by a 2-week washout period. Primary outcomes were PC(20) values and the stage number (triple dose) at which FEV(1) values dropped by 20%(.) Post-montelukast therapy PC(20) was compared to those for the post-placebo period.


Following 4 weeks of montelukast treatment, the mean PC(20) was 4.79 +/- 4.69 mg/mL, while after 4 weeks of placebo the mean PC(20) was 2.07 +/- 2.37 mg/mL (p = 0.001). The montelukast/placebo ratio for PC(20) was 2.56 with a 95% confidence interval (CI) of 1.71 to 3.99. The median difference in stage was one triple dose with a 95% CI of 0.5 to 1.5.


Four weeks of treatment with montelukast resulted in a decreased BHR compared with placebo.

[Indexed for MEDLINE]

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