Spray composition
View Patent ↗An aqueous-based sprayable composition comprises a therapeutic or palliative agent, water and a mixture of microcrystalline cellulose and alkali metal carboxyalkylcellulose. In one embodiment, the composition is a non-Newtonian nasal spray exhibiting a very rapid viscosity recovery upon removal of shear forces.
1. A spray composition comprising water, a soluble therapeutic or palliative agent and a mixture of microcrystalline cellulose and an alkali metal carboxyalkylcellulose, wherein complex viscosity of the composition increases to at least about 10 times a minimum complex viscosity of the composition as measured under high shear conditions, within about 20 seconds after the high shear conditions terminate.
2. The spray composition of claim 1 , wherein the microcrystalline cellulose comprises about 85 to about 95 weight percent of the mixture with alkali metal carboxyalkylcellulose.
3. The spray composition of claim 1 , wherein the alkali metal carboxyalkylcellulose comprises carboxymethylcellulose sodium.
4. The spray composition of claim 1 , wherein the mixture of microcrystalline cellulose and an alkali metal carboxyalkylcellulose comprises about 2.5 to about 5 weight percent.
5. The spray composition of claim 1 , further comprising up to about 10 weight percent of a rheology-modifying polymer.
6. The spray composition of claim 1 , further comprising up to about 10 weight percent of a polymer selected from the group consisting of algin, carageenans, carbomers, galactomannans, hydroxypropyl methylcellulose, hydroxypropyl cellulose, polyethylene glycols, polyvinyl alcohol, polyvinylpyrrolidone, sodium carboxymethyl chitin, sodium carboxymethyl dextran, sodium carboxymethyl starch, xanthan gum and mixtures of any two or more thereof.
7. The spray composition of claim 1 , wherein the therapeutic agent comprises a nasal decongestant.
8. The spray composition of claim 1 , wherein the therapeutic agent comprises a nasal decongestant selected from the group consisting of levmetamfetamine, ephedrine, ephedrine hydrochloride, ephedrine sulfate, naphazoline hydrochloride, oxymetazoline hydrochloride, phenylephrine hydrochloride, propylhexedrine and xylometazoline hydrochloride.
9. The spray composition of claim 1 , wherein the therapeutic agent comprises a topical anesthetic.
10. The spray composition of claim 9 , which is intended for application to oropharyngeal tissue.
11. The spray composition of claim 9 , which is intended for application to the skin.
12. The spray composition of claim 1 , wherein the therapeutic agent comprises a topical anesthetic selected from the group consisting of phenol, hexylresorcinol, salicyl alcohol, benzyl alcohol, dyclonine, dibucaine, benzocaine, buticaine, cetylpyridinium chloride, diperidon, clove oil, menthol, camphor, eugenol, lidocaine, tetracaine, pramoxine and mixtures of any two or more thereof.
13. A nasal spray composition comprising water, a soluble nasal decongestant and a mixture of microcrystalline cellulose and an alkali metal carboxyalkylcellulose, wherein complex viscosity of the composition increases to at least about 10 times a minimum complex viscosity of the composition as measured under high shear conditions, within about 20 seconds after the high shear conditions terminate.
14. The spray composition of claim 13 , wherein the nasal decongestant is selected from the group consisting of levmetamfetamine, ephedrine, ephedrine hydrochloride, ephedrine sulfate, naphazoline hydrochloride, oxymetazoline hydrochloride, phenylephrine hydrochloride, propylhexedrine and xylometazoline hydrochloride.
15. The spray composition of claim 13 , wherein the nasal decongestant comprises oxymetazoline.
16. The spray composition of claim 13 , wherein the microcrystalline cellulose comprises about 85 to about 95 weight percent of the mixture with alkali metal carboxyalkylcellulose.
17. The spray composition of claim 13 , wherein the alkali metal carboxyalkylcellulose comprises carboxymethylcellulose sodium.
18. The spray composition of claim 13 , wherein the mixture of microcrystalline cellulose and an alkali metal carboxyalkylcellulose comprises about 2.5 to about 5 weight percent.
19. The spray composition of claim 13 , wherein the mixture of microcrystalline cellulose and an alkali metal carboxyalkylcellulose comprises about 2.5 to about 3.5 weight percent.
20. The spray composition of claim 13 , wherein the mixture of microcrystalline cellulose and an alkali metal carboxyalkylcellulose comprises about 3 weight percent.
21. The spray composition of claim 13 , further comprising up to about 10 weight percent of a rheology-modifying polymer.
22. The spray composition of claim 13 , further comprising up to about 10 weight percent of a polymer selected from the group consisting of algin, carageenans, carbomers, galactomannans, hydroxypropyl methylcellulose, hydroxypropyl cellulose, polyethylene glycols, polyvinyl alcohol, polyvinylpyrrolidone, sodium carboxymethyl chitin, sodium carboxymethyl dextran, sodium carboxymethyl starch, xanthan gum and mixtures of any two or more thereof.
23. The spray composition of claim 13 , further comprising about 0.5 to about 5 weight percent of polyvinylpyrrolidine.
24. The spray composition of claim 1 , wherein the mixture of microcrystalline cellulose and an alkali metal carboxyalkylcellulose comprises about 2.5 to about 3.5 weight percent.
25. The spray composition of claim 1 , wherein the mixture of microcrystalline cellulose and an alkali metal carboxyalkylcellulose comprises about 3 weight percent.
26. The spray composition of claim 13 , further comprising mometasone furoate monohydrate.