depressant|depressants

这种药物是一种镇静剂，能帮助缓解焦虑。

This medication is a ___depressant that helps reduce anxiety.

医生建议避免在服用镇静剂后驾驶车辆。

Doctors advise against driving after taking ___depressants.

这种药物是一种温和的镇静剂，能帮助缓解失眠问题。

This medication is a mild ___depressant that helps relieve insomnia.