The invention discloses an
aerosol containing muscarine
receptor antagonist and beta 2
receptor stimulant, and a preparation method thereof. The
aerosol contains a propulsive agent, long-acting beta 2
receptor stimulant particles, and long-acting muscarine
antagonist particles; in LABA particles, by volume, the geometric particle size of 90% particles is smaller than 10<mu>m, and the geometric particle size of 50% particles is smaller than 4<mu>m or even smaller; the middle particle size of LAMA particles ranges from 500nm to 10<mu>m; the LAMA particles are particles composed of LAMA,
calcium chloride, and a surfactant; or the LAMA particles are particles composed of LAMA and an
excipient. 1 to 100<mu>g of the
aerosol is sprayed in each time of pressing of a MDI (
metered dose inhaler), and the amount of LABA or LAMA in the aerosol ranges from 0.02 to 2mg / mL. The advantages of the aerosol are that:
delivery efficiency is relatively high, and the delivery dosage is stable in long term of storing.