That induces sleep; soporific, somniferous.
That accompanies falling asleep; especially, pertaining to the semi-conscious period immediately preceding sleep.
Soporific; inducing sleep or sedation.
Relating to, resembling, or containing opium.
Deadening; causing apathy or dullness.
To treat with an opiate drug.
A drug, hormone or other substance derived from or related to opium.
Something that dulls the senses and induces a false and unrealistic sense of contentment.