Canister containing aerosol formulations containing P134a and pa

Details Canister containing aerosol formulations containing P134a and pa Canister containing aerosol formulations containing P134a and pa

1995-05-30

1998-10-06

Bawa, Raj

Drug, bio-affecting and body treating compositions

Effervescent or pressurized fluid containing

Organic pressurized fluid

424 46, 2224021, A61K 912

Patent

active

058172939

ABSTRACT:
This invention relates to a canister suitable for delivering a pharmaceutical aerosol formulation for inhalation therapy including a propellant which comprises a container capable of withstanding the vapor pressure of the propellant used, which container is closed with a metering valve and contains a pharmaceutical aerosol formulation for inhalation therapy consisting essentially of a physiologically effective amount of particulate medicament, 1,1,1,2-tetrafluoroethane as propellant and up to 5% w/w based upon propellant of a polar co-solvent, which formulation is substantially free of surfactant.

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