The invention discloses
cyclosporin A pulmonary inhaled macroporous microspheres and a preparation method thereof. The
cyclosporin A pulmonary inhaled macroporous microspheres consist of the following components in part by weight: 1 to 3 parts of
cyclosporin A, 1 to 10 parts of
chitosan derivative, 0.5 to 5 parts of beta-
cyclodextrin or a derivative thereof and 0.5 to 5 parts of porogen, and havethe particle size of 1 to 10mu m. The preparation method mainly comprises the steps of filtering and spray-
drying. The invention has the advantages that: the pulmonary inhaled microspheres have a macroporous structure, can be used for pulmonary administration, have the particle size of 1 to 10mu m, the
medicine loading capacity of 5.28 to 7.28 percent, the encapsulating rate of 0.85 to 1.19 percent, and high
biocompatibility, can reduce
irritation of a
respiratory mucosa, and is particularly suitable for a
dry powder inhalant to fulfill the aim of pulmonary administration, the
medicine is sustained-release, the using amount and side effects of the
medicine can be reduced, the preparation method is easy and convenient to operate, the process is stable, and industrial production is easy to implement.