静脉注射了镇静剂后病人安然入睡。The patient is sedated with intravenous use of sedative drugs.一些镇静剂适得其反，加重了患者的焦虑。Some sedatives produce the para-doxical effect of making the person more anxious.他们把鸦片用作镇静剂而不是毒品。They use opium as a sedati...

“镇静剂”的英语可以翻译为：calmative，depressant，mitigative，narcotic，ataractic ...