Homogene steroidhaltige Präformulierungen zur Herstellung niedrigdosierter fester und halbfester pharmazeutischer Zubereitungen

摘要

The invention relates to homogeneous preformulations containing high concentrations of steroids, which are suitable for producing low-dose solid and semi-solid pharmaceutical preparations with a steroid concentration of between 0.001 and 1 weight percent. Said preformulations are obtained by evaporating the dispersing agent containing the steroidal active ingredient from a suspension containing the usual pharmaceutical additives. To this end, a spray mist is produced in which the average drop diameter is greater than the average diameter of the additive particles, and the maximum grain size of the dried particles of the steroidal preformulation is increased by less than 30 % in relation to the grain size of the additive. Said preformulations are characterised by their homogenity and resistance to demixing, whereby the steroidal active ingredient is finely dispersed and integrally bonded to the additive. Surprinsingly it was discovered that these types of steroidal preformulations, in comparison with conventional methods, can be processed without difficulty into low-dose pharmaceutical preparations with very good homogeneity and active ingredient stability. The method for producing homogeneous steroid preformulations for low-dose solid and semi-solid pharmaceutical preparations with a steroid concentration of between 0.001 and 1 weight percent stands out among other things by the fact that the active ingredient and additive particles from the atomized suspension are not dried one next to the other. The choice of processing conditions during atomization makes it possible for practically all the active ingredient to be bonded integrally to the additive.