安定药

例句：

1. 1. The doctor prescribed a tranquilizer for her anxiety.
   医生给她开了镇静剂来缓解她的焦虑。
2. 2. She took the medication as directed and felt much better after taking it.
   她按照指示服用了药物，服用后感觉好多了。
3. 3. The patient was given a sedative to help him sleep before surgery.
   病人在手术前被给予镇静剂帮助他入睡。