Sammenlignet med inhalationsbeclomethason (200 µg, 2 gange dagligt med spacer) viste montelukast hurtigere initial respons, selvom beclomethason ved 12- ugers undersøgelsen gav større gennemsnitlig behandlingseffekt (% - ændring fra baseline for montelukast versus beclomethason henholdsvis for FEV1:
Compared with inhaled beclomethasone (200 µg twice daily with a spacer device), montelukast demonstrated a more rapid initial response, although over the 12-week study, beclomethasone provided a greater average treatment effect (% change from baseline for montelukast vs beclomethasone, respectively for FEV1: