Patent ID: 8283352

Claim:
A stable aqueous solution-type preparation comprising as an active ingredient N-[4-[4-(1,2-benzisothiazol-3-yl)-1-piperazinyl]-(2R,3R)-2,3-tetramethylene-butyl]-(1′R,2′S,3′R,4′S)-2,3-bicyclo[2,2,1]heptanedicarboxylmide, which is a free form of lurasidone, or a pharmaceutically acceptable acid addition salt thereof, wherein the active ingredient is solubilized by the following additives (i) (i) 50 to 75% (W/W) of propylene glycol, 6 to 24% (W/W) of water and 5 to 33% (W/W) of anhydrous ethanol, and the active ingredient is present in a concentration of 1 to 20 mg/mL.