In the present invention, there is disclosed a process for preparing inhalation powders, characterized in that N+m portions about equal in size of a substance with larger particle size distribution (adjuvant) and N portions equal in size of a substance with smaller particle size distribution (active ingredient) are alternately added in parts into a suitable mixing vessel and after complete addition, the 2N+m layers of the two components are mixed by means of a suitable mixer, whereby first the addition of one portion of the substance with larger particle size takes place, whereby N is an integer greater than 0, preferably greater than 5 and m is 0 or 1.Oppfinnelsen vedrører en ny fremgangsmåte for fremstilling av pulverformige preparater for inhalasjon.
