- ataractic, ataraxic, sedative, tranquilizing, tranquilising - tending to soothe or tranquilize; "valium has a tranquilizing effect"; "took a hot drink with sedative properties before going to bed"
Antonym: stimulative (indirect, via depressant)
- sedative, sedative drug, depressant, downer - a drug that reduces excitability and calms a person
--1 is a kind of medicine, medication, medicament, medicinal drug; drug of abuse, street drug
--1 has particulars:benzodiazepine; bromide; chloral hydrate; glutethimide, Doriden; sedative-hypnotic, sedative-hypnotic drug