A pressure-liquefied
propellant mixture for aerosols, comprising a fluorinated
alkane, in particular 1,1,1,2-tetrafluoroethane and / or 1,1,1,2,3,3,3-heptafluoropropane, and
carbon dioxide, makes possible an improvement of the
wetting properties of pharmaceutically active compounds, with which the formulation problems existing with hydrofluoroalkanes in relation to suspension as well as solution aerosols can be overcome and thus improved medicinal
aerosol formulations can be obtained. With the aid of
carbon dioxide, it is also possible to specifically influence the pressure and thus the
particle size distribution and also by displacement of
oxygen from the hydrofluoroalkanes to improve the storage stability of oxidation-sensitive active compounds.