Related Clues:

• Stimulant's opposite
• Sleep inducer of song
• It's a downer
• Bedtime visitor
• Codeine, e.g.
• Sleep guy, supposedly
• Prescription number
• Nightly visitor of folklore
• Narcotic or sedative
• Morphine. e.g.
• Dentist's number?
• Chilling order?
• Soporific drug
• Addictive narcotic
• Sleep-inducing drug