An inhalable dry powder comprising acetylsalicylic acid in the form of particles having a median aerodynamic mass (MMAD) in the range of about 0.5 μm to about 10 μm. The inhalable dry powder comprises pharmaceutically acceptable excipients such as phospholipids in an amount ranging from about 0.1% (w / w) to about 10% (w / w) of the particles. May be included. [Selection] Figure 1約0.5μm~約10μmの範囲内の空気力学的質量中央径(MMAD)を有する粒子の形態の、アセチルサリチル酸を含む吸入可能な乾燥粉末。その吸入可能な乾燥粉末は、リン脂質などの薬学的に許容され得る賦形剤を、その粒子の約0.1%(w/w)~約10%(w/w)の範囲の量で含み得る。【選択図】図1