Patent ID: 7138133

Claim:
A liquid composition comprising from about 2% to about 40% guaifenesin, from about 1% to about 40% dextromethorphan, and a vehicle comprising: a. from about 5% to about 25% of a polyoxyalkylene block copolymer wherein said polyoxyallcylene block copolymer corresponds to the formula: x has a value from about 1 to about 130, y has a value from about 1 to about 72 and x′ has a value from 0 to about 130; b. from about 30% to about 90% of a hydrophilic solvent; and c. from about 5% to about 45% water; wherein the proportions of polyoxyalkylene block copolymer, hydrophilic solvent and water are such that the vehicle is in the region bounded by segment lines AB, BC, CD and DA of FIG. 1 ; and wherein the composition is suitable for oral administration.