Patent ID: 8518377
Filing Date: 2013-08-27
Classification: A61K,A61P

Abstract:
1. A propellant-containing aerosol suspension comprising: particles of active substance with chemically bound water, at least 85 wt. % of a propellant gas or a propellant gas mixture with TG 227 ea and/or TG 134 a or in admixture with at least one other propellant gas selected from the group consisting of propane, butane, pentane, dimethylether, CHCIF.sub.2, CH.sub.2F.sub.2, CF.sub.3CH.sub.3, isobutane, isopentane and neopentane, wherein the aerosol suspension contains the surface-active substance polyvinylpyrrolidone in an amount of 0.005-5% by mass of the suspension and does not contain polyethylene glycol and does not contain ethanol; wherein when the propellant gas mixture comprises TG 227 ea, the suspension contains between 10 and 1000 ppm water; wherein when the propellant gas mixture comprises TG 134 a, the suspension contains between 30 and 4000 ppm water; and wherein when the propellant gas mixture comprises both TG 227 ea and TG 134 a, the suspension contains a water content obtained from the mixing ratio of the two propellant gases.