Abstract: Provided is a tablet showing improved hygroscopicity, which contains, as a pharmaceutically active ingredient, a compound showing deliquescence at a relative humidity of not less than 80% at 25 degrees C. A tablet containing a compound showing deliquescence at a relative humidity of not less than 80% at 25 degrees C. and an additive showing an equilibrium moisture absorption rate at relative humidity 75% at 25 degrees C. of not less than 7 wt % relative to its dry weight.