覚かく醒せい作さ用よう

noun

stimulant effect; wakefulness-promoting action

Refers to the property of a substance (such as caffeine) that promotes alertness or counteracts drowsiness. Often used in medical, pharmacological, or everyday contexts.

• コーヒーの覚かく醒せい作さ用ようで、夜よる遅おそくまで勉べん強きょうできた。

  Thanks to the stimulant effect of coffee, I was able to study late into the night.

• この薬くすりには強つよい覚かく醒せい作さ用ようがあるため、就しゅう寝しん前まえの服ふく用ようは避さけてください。

  This medicine has a strong wakefulness-promoting effect, so please avoid taking it before bedtime.