noun
sleep-inducing drug; sleep aid
A drug or medication that helps induce sleep; often used in medical or pharmacological contexts.
医者から睡眠導入剤を処方してもらった。
I got a prescription for a sleep-inducing drug from the doctor.
睡眠薬 is a more common term for sleeping pills or hypnotics, while 睡眠導入剤 specifically emphasizes the induction of sleep.
Compound of 睡眠 (sleep) + 導入 (introduction, induction) + 剤 (drug, agent).