Syrup Composition Comprising Dexibupropen as an Active Ingredient and Method for the Preparation Thereof

1 . A glycerin-free dexibupropen syrup composition comprising dexibupropen ((S)-ibupropen) having an average particle size ranging from 10 to 300 μm as an active ingredient, said composition having a viscosity ranging from 500 to 3,000 cps and pH ranging from 3.0 to 6.0.

2 . The composition of claim 1 , which further comprises a viscosity controlling agent, a sweetener, a suspending agent, an emulsifier, a pH controlling agent and a preservative.

3 . The composition of claim 2 , wherein the amounts of the active ingredient, viscosity controlling agent, sweetener, suspending agent, emulsifier and pH controlling agent are 0.1 to 10 w/v %, 0.01 to 40.0 w/v %, 0.1 to 80.0 w/v %, 0.01 to 10.0 w/v %, 0.01 to 5.0 w/v % and 0.01 to 5.0 w/v %, respectively, based on the total volume of the composition.

4 . The composition of claim 2 , wherein the viscosity controlling agent is selected from the group consisting of D-sorbitol solution, agar, sodium alginate, povidone, polyethylene glycol, hydroxyethylene cellulose and a mixture thereof.

5 . The composition of claim 2 , wherein the sweetener is selected from the group consisting of a sugar, high fructose, stevioside, dipotassium glycirhyzinate and a mixture thereof.

6 . The composition of claim 2 , wherein the suspending agent is selected from the group consisting of caoline, xanthan gum, agar and a mixture thereof.

7 . The composition of claim 2 , wherein the emulsifier is selected from the group consisting of polysorbate compounds.

8 . The composition of claim 2 , wherein the pH controlling agent is selected from the group consisting of citric acid, sodium citrate and a mixture thereof.

9 . The composition of claim 2 , which further comprises a preservative selected from the group consisting of methyl parahydroxybenzoate, propyl parahydroxybenzoate, sodium benzoate and a mixture thereof; a flavoring agent; a colorant; or a solvent.

10 . A method for the preparation of the composition of claim 1 , which comprises the steps of:

(a) dispersing a viscosity controlling agent and a portion of a predetermined amount of a sweetener in distilled water, stirring the resulting mixture at 80 to 90° C. for 1 to 6 hours to obtain a homogeneous solution, adding thereto a preservative, and stirring the resulting solution;

(b) dissolving clearly the remaining portion of the predetermined amount of the sweetener in the solution obtained in (a) while maintaining the solution at 75 to 85° C., adding thereto a viscosity controlling agent and a pH controlling agent, and dissolving the resulting solution completely;

(c) cooling the solution obtained in (b) to 25 to 29° C. by adding cool water;

(d) adding a dexibupropen dispersion obtained by dispersing dexibupropen in a suspending agent to an aqueous emulsion containing a colorant and an emulsifier, and stirring the resulting mixture for 0.5 to 6 hours to obtain a suspension; and

(e) dispersing the solution obtained in (c) in the suspension obtained in (d), adding a flavoring agent, and mixing the resulting mixture uniformly.