The invention belongs to the field of pharmaceutical preparations, and discloses a long-acting
dry powder microsphere inhalant as well as a preparation method and application thereof. The inhalant is a long-acting
dry powder microsphere inhalant prepared by taking a mixture of multi-cystic vesicles prepared from
phospholipid and a
dry powder auxiliary material as a
drug carrier and entrapping active ingredients for treating
lung diseases through a
spray drying technology. Compared with a dry
powder microsphere inhalant prepared from traditional monocystic lipidosome, the long-acting dry
powder microsphere inhalant has a longer-time slow-release effect. According to the preparation, a unique process of firstly preparing multi-
capsule vesicles and then performing
spray drying is adopted, the obtained microspheres have an aerodynamic particle size of 1-5 microns, can be effectively deposited in the
lung and show a remarkable long-acting slow-release characteristic, and the cumulative release rate reaches about 64% after 48-hour in-vitro release. Compared with a traditional monocystic
liposome inhalant, the
drug action time is effectively prolonged, the administration frequency is reduced, and the
patient compliance is improved. The invention provides a new thought for the research of a pulmonary
drug delivery system, and has a wide clinical application prospect.