A solid dispersion containing: an amide derivative which is selected from the group consisting of: N-(4-methylphenyl)-N-(2-{(4-(1,3-oxazol-4-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide); N-(4-methylphenyl)-N-(2-{[4-(1,2,4-oxadiazol-3-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide; N-(2,6-dimethylphenyl)-N-(2-{[4-(1,2,4-oxadiazol-3-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide; N-(3-fluoro-4-methylphenyl)-N-(2-{[4-(1,2,4-oxadiazol-3-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide; and N-(4-chloro-3-methylphenyl)-N-(2-{[4-(1,2,4-oxadiazol-3-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide, and a water-soluble polymer which is a polymer or two polymers selected from the group consisting of hydroxypropylmethyl cellulose and copolyvidone, wherein the solid dispersion is preparable by a process comprising the steps of: dissolving and/or suspending the amide derivative and the water-soluble polymer in a pharmaceutically acceptable solvent, and removing the solvent by spray drying to prepare the solid dispersion. an amide derivative which is selected from the group consisting of: N-(4-methylphenyl)-N-(2-{(4-(1,3-oxazol-4-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide); N-(4-methylphenyl)-N-(2-{[4-(1,2,4-oxadiazol-3-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide; N-(2,6-dimethylphenyl)-N-(2-{[4-(1,2,4-oxadiazol-3-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide; N-(3-fluoro-4-methylphenyl)-N-(2-{[4-(1,2,4-oxadiazol-3-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide; and N-(4-chloro-3-methylphenyl)-N-(2-{[4-(1,2,4-oxadiazol-3-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide, and a water-soluble polymer which is a polymer or two polymers selected from the group consisting of hydroxypropylmethyl cellulose and copolyvidone, wherein the solid dispersion is preparable by a process comprising the steps of: dissolving and/or suspending the amide derivative and the water-soluble polymer in a pharmaceutically acceptable solvent, and removing the solvent by spray drying to prepare the solid dispersion. N-(4-methylphenyl)-N-(2-{(4-(1,3-oxazol-4-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide); N-(4-methylphenyl)-N-(2-{[4-(1,2,4-oxadiazol-3-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide; N-(2,6-dimethylphenyl)-N-(2-{[4-(1,2,4-oxadiazol-3-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide; N-(3-fluoro-4-methylphenyl)-N-(2-{[4-(1,2,4-oxadiazol-3-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide; and N-(4-chloro-3-methylphenyl)-N-(2-{[4-(1,2,4-oxadiazol-3-yl)phenyl]amino}-2-oxoethyl)tetrahydro-2H-thiopyran-4-carboxamide 1,1-dioxide, and a water-soluble polymer which is a polymer or two polymers selected from the group consisting of hydroxypropylmethyl cellulose and copolyvidone, wherein the solid dispersion is preparable by a process comprising the steps of: dissolving and/or suspending the amide derivative and the water-soluble polymer in a pharmaceutically acceptable solvent, and removing the solvent by spray drying to prepare the solid dispersion. dissolving and/or suspending the amide derivative and the water-soluble polymer in a pharmaceutically acceptable solvent, and removing the solvent by spray drying to prepare the solid dispersion.