HFC solution formulations containing an anticholinergic

摘要

An aerosol solution formulation comprising: (a) a salt of formula 1 wherein X<-> is an anion (b) an HFC propellant; (c) a cosolvent; and (d) an inorganic or an organic acid, wherein the concentration of the acid is in a range that corresponds with a pH range of 2.5 to 5.5 in aqueous solution.