1) Antianxiety agent 2) Ataractic 3) Ataractic agent 4) Ataractic drug 5) Psychotropic agent 6) Sedative 7) Sedative-hypnotic 8) Sedative-hypnotic drug 9) Tranquilizer 10) Tranquillizer 1) Antipsychotic 2) Neuroleptic 3) Tranquilizer 4) Tranquillizer 
<pharmacology> A medication with a calming, soothing effect that relieves anxiety. ... Most sedatives can also promote sleep. Overdosage of a sedative medication can lead to dangerous respiratory depression (slowed breathing). A large group of medications with sedative effects are the benzodiazepines. ... The first tranquilliser librium (chlo...
tranquilliser (British)