METHODS : During a double-blind placebo-controlled crossover study , 200 micrograms fluticasone propionate aqueous nasal spray ( in the active treatment period ) and placebo ( in the placebo treatment period ) were administered twice daily for 2 weeks to 22 patients allergic to house dust mite .
methods : during a double-blind placebo-controlled crossover study , 200 micrograms fluticasone propionate aqueous nasal spray ( in the active treatment period ) and placebo ( in the placebo treatment period ) were administered twice daily for 2 weeks to 22 patients allergic to house dust mite .
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