薬が効きすぎる くすりがききすぎる Also written 薬が効き過ぎる Meanings Expression, Ichidan verb to work too well (of a punishment, reprimand, etc.); to be too much (for someone); to have a stronger effect than intended Kanji 薬 drug. Read as くすり. 効 effect. Read as きく. Word lists Idioms Jinuma: Japanese Dictionary · Word lists