abstract |
Provided is a nanoparticle including a poorly-water-soluble physiologically active compound, and an additive substance, wherein a relative span factor (R.S.F) of the nanoparticle satisfies formula: 0 < (R.S.F) ≦ 1.0, a volume average particle diameter of the nanoparticle is 200 nm or less, and the poorly-water-soluble physiologically active compound is covered with the additive substance. |