1. Sleep inducing
   - soporiferous, somniferous, somnific, hypnogogic, hypnagogic 
2. Inducing mental lethargy
   - narcotic, soporiferous

1. A drug that induces sleep
   - hypnotic

Derived forms: soporifics

See also: depressant, uninteresting

Type of: drug, hypnagogue

Encyclopedia: Soporific

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