Provided is a tablet having a high content of 2-[[6-[(3R)-3-amino-1-piperidinyl]-3,4-dihydro-3-methyl-2,4-dioxo-1(2H)-pyrimidinyl]methyl]-4-fluorobenzonitrile (compound (A)) or a salt thereof as a pharmaceutically active component. A tablet containing compound (A) or a salt thereof, and a fluidizer, which has a compound (A) content of 35-50 weight %.
