AN INHALATION DEVICE FOR TRANSPULMONARY ADMINISTRATION COMPRISES: A CHAMBER (16) FOR CONTAINING A PHARMACEUTICAL COMPOSITION WHICH IS PULVERIZED INTO FINE PARTICLES BY AN AIR- GENERATED IMPACT FOR DISPERSAL IN AIR AN AIR INLET FLOW PATH (2) FOR INTRODUCING TO THE CHAMBER (16) OUTSIDE AIR TO APPLY THE AIR-GENERATED IMPACT TO THE PHARMACEUTICAL COMPOSITION AND FOR INJECTING THE OUTSIDE AIR TOWARD THE PHARMACEUTICAL COMPOSITION AN INHALATION FLOW PATH (1) FOR INHALING THE PULVERIZED PHARMACEUTICAL COMPOSITION A HOUSING (9) FOR ACCOMMODATING THE CHAMBER (16), THE AIR INLET FLOW PATH (2), AND THE INHALATION FLOW PATH (1) A MOUTHPIECE (10) PROVIDED AT ONE END OF THE HOUSING (9), THE MOUTHPIECE (9) BEING PROVIDED WITH A MOUTH-SIDE FLOW PATH (11) WHICH COMMUNICATES WITH THE INHALATION FLOW PATH (1), AND AN AUXILIARY FLOW PATH (12) WHEREIN THE INHALATION DEVICE FOR TRANSPULMONARY ADMINISTRATION IS CONFIGURED SUCH THAT THE AIR-GENERATED IMPACT IS APPLIED TO THE PHARMACEUTICAL COMPOSITION BY THE OUTSIDE AIR WHICH FLOWS INTO THE CHAMBER (16) BY INHALATION-INDUCED PRESSURE GENERATED WHEN A USER (PATIENT) INHALES AIR, AND THE PULVERIZED PHARMACEUTICAL COMPOSITION IS INTRODUCED TO THE MOUTH-SIDE FLOW PATH (11), AND AT THE SAME TIME THE OUTSIDE AIR IS DIRECTLY INTRODUCED TO THE AUXILIARY FLOW PATH BY THE INHALATION-INDUCED PRESSURE.
