calmative

例句：

1. 1. This medication is used to treat anxiety and insomnia.
   这种药物用于治疗焦虑和失眠。
2. 2. The doctor prescribed a calmative for her condition.
   医生为她的状况开了一种镇静剂。
3. 3. Calmatives can help reduce stress and improve sleep quality.
   镇静剂可以帮助减轻压力并提高睡眠质量。