FREMGANGSMAADE TIL FREMSTILLING AF FARMACEUTISKE, KOSMETISKE ELLER DIAGNOSTISKE PRAEPARATER

摘要

The process produces pharmaceutical, cosmetic or diagnostic formulations by the freeze drying of one or more substances in solution or in suspension in a solvent or a mixture of solvents. The solution or suspension is locally and progressively cooled in a controlled manner while agitating so as to produce microcrystals of solvent which are put in suspension in the remainder of the liquid until there is obtained a high-viscosity microcrystalline complex system comprising essentially isolated microcrystals of solvent in intimate mixture with interstitial liquid phases having a high concentration of the initially present substances. The microcrystalline complex system is hardened by cooling and lyophilized. This process permits the obtainment of lyophilized formulations having a higher dissolving or dispersing rate and lyophilized compositions of normally incompatible substances.