Patent ID: 8362091

Claim:
A foamable hygroscopic pharmaceutical composition in a pressurized container, the foamable hygroscopic pharmaceutical composition comprising: i) a carrier composition comprising: a. at least one hygroscopic substance selected from the group consisting of: a polyethylene glycol (PEG) and a polyol at a sufficient concentration to provide an Aw value of the hygroscopic pharmaceutical composition of less than 0.9; b. about 0.01% to about 5% by weight of the carrier composition of a gelling agent; and c. 0% to about 25% by weight of the carrier composition of water; and ii) a liquefied or compressed gas propellant; wherein the foamable hygroscopic pharmaceutical composition forms a breakable foam upon release from the pressurized container; wherein the breakable foam does not immediately collapse upon exposure to skin temperature; and wherein the breakable foam breaks under shear force.