ataractic drug ata·rac·ticd·rug uncommon noun 1. a drug used to reduce stress or tension without reducing mental clarity Synonymstranquilizertranquillizertranquilliserantianxiety agentataractic drugataractic agentataractic Related words Word family tranquillisetranquillizetranquilize Broader terms psychotropic agentsedative-hypnotic Narrower terms major tranquilizerminor tranquilizer WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.