Patent ID: 8877165

Claim:
A solid preparation for oral application comprising (a) gum tragacanth and (b) at least one polyphosphoric acid or a salt thereof, wherein the solid preparation is made of two or more layers, a content of (b) the at least one polyphosphoric acid or a salt thereof in a first layer ( 1 ) is from 0.002 to 20 mass % and is greater than that of (a) the gum tragacanth and (b) the at least one polyphosphoric acid or a salt thereof dissolves earlier than said (a) gum tragacanth and, a content of (a) the gum tragacanth contained in a second layer ( 2 ) which is brought into contact with the oral cavity later than said layer ( 1 ) or dissolves later than said layer ( 1 ) is from 0.002 to 20 mass % and is greater than that of (b) the at least one polyphosphoric acid or a salt thereof, wherein the solid preparation is in a tablet, pill, or granular form.