To provide a pharmaceutical tablet formulation, which can be compressed, preferably compressed directly, into a tablet having a suitable hardness/fragility, acceptable disintegration time, low moisture sensitivity, better stability, a pattern of acceptable solution, and a better pharmacokinetic profile in treated patients.SOLUTION: A pharmaceutical tablet formulation comprises, per unit dosage form e.g. per tablet, the following ingredients: (a) a compound as an active ingredient or a pharmaceutically acceptable salt thereof, the compound having formula (a): (wherein R is substituted adamantyl and n is an integer from 0 to 3); (b) a hydroxypropyl methylcellulose with an apparent viscosity of 80,000 cP to 120,000 cP (nominal value 100,000 cP) when present in a 1% solution; (c) a microcrystalline cellulose; and (d) a magnesium stearate.SELECTED DRAWING: None
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