noun
children's medicine for nervousness; traditional remedy for fretfulness in children
A traditional Japanese herbal or folk medicine given to calm irritable, restless, or colicky children. The term is somewhat old-fashioned and may be encountered in historical or cultural contexts.
昔は、夜泣きする子に虫薬を飲ませたものだ。
In the old days, they used to give children's calming medicine to babies who cried at night.
祖母は「虫の虫薬」という言葉をよく使ってい
My grandmother often used the phrase 'mushi no mushigusuri' (medicine for the 'worm' that causes fretfulness).