A therapeutic dry powder preparation and a method of administering such a
preparation are disclosed for effectively de-aggregating and dispersing
into air a dose of medication powder in an administration the dose to a
user. The present dry powder preparation and method do not require other
sources of energy besides the power of an inhalation effort by a user to
produce a very high degree of de-aggregation and efficient dispersal into
air of the dry powder medication dose. Utilizing an effort of sucking air
through a nozzle, the particles of the therapeutic powder dose, made
available to the nozzle, are gradually de-aggregated and dispersed into a
stream of air entering the nozzle. The gradual de-aggregation and
dispersal is produced by an air-razor effect due to a relative motion
introduced between the nozzle and the powder dose
