Process for conditioning substances

PCT No. PCT/SE94/00780 Sec. 371 Date Jan. 30, 1995 Sec. 102(e) Date Jan. 30, 1995 PCT Filed Aug. 25, 1994 PCT Pub. No. WO95/05805 PCT Pub. Date Mar. 2, 1995The present invention relates to a process for providing a stable crystallinic form to a fine-grained substance or a substance mixture, which can be produced, stored and used while maintaining the aerodynamic properties required for inhalation of such a substance or a substance mixture, by a) in case of a substance mixture, preparing a homogenous mixture of the substances; b) micronizing, direct precipitating or diminishing by any conventional method the substance or substance mixture into a particle size required for inhalation, the particle size being less than 10 mu m; c) optionally preparing a homogenous mixture of the desired substances when each substance has been introduced from stage b) as separate fine-grained particles; d) conditioning said substance or substance mixture by treatment with a water containing vapor phase in a controlled fashion; and e) drying.