Orally administered liquid compositions

An orally administered liquid composition comprising from about 2% to about 40% guaifenesin and a vehicle comprising:

• a. from about 5% to about 25% of a polyoxyalkylene block copolymer wherein said polyoxyalkylene block copolymer corresponds to the formula:
• 3
• x has a value from about 100, y has a value from about 70 and x has a value from about 100;
• 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.

An orally administered liquid composition comprising from about 5% to about 30% guaifenesin and a vehicle comprising:

• a. from about 5% to about 20% of a polyoxyalkylene block copolymer wherein said polyoxyalkylene block copolymer corresponds to the formula:
• 4
• x equals 100, y equals 70 and x′ equals 100 and has an average molecular weight of about 12,600;
• c. from about 40% to about 90% propylene glycol and ethanol;
• and
• d. from about 5% to about 40% 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.