CPC A61K 31/40 (2013.01) [A61K 9/008 (2013.01); A61K 31/4704 (2013.01); A61K 31/56 (2013.01); A61K 31/573 (2013.01); A61K 45/06 (2013.01); A61K 47/10 (2013.01); A61K 47/12 (2013.01); A61K 47/24 (2013.01); A61K 47/32 (2013.01); A61K 47/58 (2017.08); A61P 11/00 (2018.01)] | 20 Claims |
1. A method of improving the stability of a pharmaceutical composition comprising:
adding a propellant component consisting of one or more hydrofluorocarbon and hydrocarbon propellant compounds, where at least 90 wt % of the propellant component is 1,1-difluoroethane (HFA-152a), to the pharmaceutical composition, the pharmaceutical composition comprising a drug component comprising at least one pharmaceutically acceptable salt of glycopyrrolate,
wherein the drug component is the sole drug component in the pharmaceutical composition.
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