In a metered dose inhaler, comprising a canister and metering valve, containing a suspension aerosol formulation comprising particles of formoterol fumarate dihydrate and fluticasone propionate suspended in an HFA propellant, a method of reducing deposition of particles on the surfaces of the canister and the metering valve, the method comprising the step of adding a wetting agent to the formulation.キャニスタと絞り弁とを備え、HFA噴射剤中に懸濁したフマル酸ホルモテロール二水和物およびプロピオン酸フルチカゾンの粒子を含む懸濁エアゾール製剤を含有する定量噴霧式吸入器において、該製剤に湿潤剤を添加する工程を備えるキャニスタと絞り弁との表面への粒子堆積を減少させる方法。
