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  • Title: Protection against exercise-induced bronchoconstriction two hours after a single oral dose of montelukast.
    Author: Philip G, Villarán C, Pearlman DS, Loeys T, Dass SB, Reiss TF.
    Journal: J Asthma; 2007 Apr; 44(3):213-7. PubMed ID: 17454341.
    Abstract:
    The objective of this double-blind cross-over study was to evaluate montelukast for the prevention of exercise-induced bronchoconstriction (EIB). Sixty-two patients with EIB (post-exercise decrease in forced expiratory volume in 1 second (FEV(1)) > or = 20% at pre-randomization) were randomized to montelukast 10 mg or placebo, followed by exercise-challenge 2, 12, and 24 hours postdose. The primary endpoint was the maximum percent-fall in FEV(1) (from pre-exercise FEV(1)) during 60 minutes after exercise-challenge at 2 hours postdose. This endpoint was improved after montelukast (mean +/- SD = 11.7% +/- 10.8) versus placebo (17.5% +/- 13.8) (p < or = 0.001); numerically greater improvements were seen at 12 hours and 24 hours. A quicker time to recovery after challenge (p < or = 0.001) and a smaller area under the curve for percent-fall in FEV(1) during 60 minutes after challenge (p < or = 0.01) were seen with montelukast at 2 hours. At this timepoint, more patients taking montelukast (45/54) than taking placebo (37/54) were protected against EIB (p = 0.039). We concluded that montelukast provided significant protection against EIB at 2 hours after a single dose.
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