Abstract: Disclosed is an inhalation device, which, by means of a simplified structure, reduces the manufacturing difficulty and cost while ensuring the use effect. In the inhalation device of the present application, a filter member closely fits a capsule insertion port, and when a mouthpiece is snap-fitted on a deck, a mesh portion is integrally located in a capsule chamber. Therefore, when pharmaceutical powder is inhaled, airflow can better pass through the mesh portion under the action of a negative pressure to flow in an ideal flow direction, thereby ensuring effective inhalation of the pharmaceutical powder.

Abstract: A non-enteric coated pharmaceutical composition having an enhanced bioavailability comprising an acid-labile active ingredient and a nanolized biocompatible polymer, wherein the acid-labile active ingredient is mixed with and trapped by the nanolized biocompatible polymer, and the acid-labile active ingredient is sustainably released from the nanolized biocompatible polymer.