Granted Patent B2

US 8,362,091 · App. 12/767,511 · Granted Jan 29, 2013

Abstract

Claims (32)

1. 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.

2. The hygroscopic pharmaceutical composition of claim 1 , further comprising 0% to about 5% by weight of a surface-active agent; and a therapeutically effective concentration of one or more active agents.

3. A foamable pharmaceutical carrier composition in a pressurized container comprising:

i) a carrier composition comprising:

a. about 50% to about 98% by weight of the carrier composition of a polar solvent selected from the group consisting of (1) a polyol and (2) a polyethylene glycol (PEG);

b. 0% to about 48% by weight of the carrier composition of a secondary polar solvent;

c. about 0.01% to about 5% by weight of the carrier composition of a gelling agent; and

d. 0% to about 25% by weight of the carrier composition of water; and

ii) a liquefied or compressed gas propellant;

wherein the foamable pharmaceutical carrier composition forms a breakable foam upon dispensing 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.

4. The pharmaceutical composition of claim 3 , wherein the gelling agent comprises a cellulose polymer.

5. The pharmaceutical composition of claim 3 , wherein the polar solvent is a PEG selected from the group consisting of PEG 200, PEG 300, PEG 400, PEG 600, PEG 1000, PEG 4000, PEG 6000 and PEG 8000.

6. The pharmaceutical composition of claim 3 , wherein the composition does not contain a surface-active agent.

7. The pharmaceutical composition of claim 3 , further comprising a therapeutically effective concentration of one or more active agents.

8. The pharmaceutical composition of claim 3 , wherein the polyol comprises at least one of glycerin, butane-1,2,3-triol, butane-1,2,4-triol, hexane-1,2,6-triol, propylene glycol, butanediol, butenediol, butynediol, pentanediol, hexanediol, octanediol, neopentyl glycol, 2-methyl-1,3-propanediol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, and dibutylene glycol or a mixture of at least two polyols.

9. The pharmaceutical composition of claim 3 , wherein the polar solvent comprises a mixture of at least one polyol and at least one PEG.

10. The pharmaceutical composition of claim 3 , wherein the pharmaceutical composition is substantially non-aqueous.

11. The pharmaceutical composition of claim 3 , wherein the pharmaceutical composition is substantially free of short-chain alcohols.

12. The pharmaceutical composition of claim 3 , wherein the pharmaceutical composition forms a stable foam at normal skin temperature for at least about 240 seconds upon release from the pressurized container.

13. The pharmaceutical composition of claim 3 , further comprising about 0.2% to about 5% by weight of a surface-active agent.

14. The pharmaceutical composition of claim 13 , wherein the surface-active agent comprises a non-ionic surfactant.

15. The pharmaceutical composition of claim 13 , wherein the surface-active agent comprises at least one non-ionic surfactant and at least one ionic surfactant.

16. The pharmaceutical composition of claim 15 , wherein the ratio of non-ionic surfactant to ionic surfactant is in the range of about 100:1 to about 6:1.

17. The pharmaceutical composition of claim 13 , further comprising a hygroscopic substance selected from the group consisting of monosaccharides, disaccharides, oligosaccharides, sugar alcohols, honey and a PEG containing surfactant, wherein the composition can provide an Aw value of less than 0.9.

18. The pharmaceutical composition of claim 17 , further comprising a therapeutically effective concentration of one or more active agents.

Assignments (8)