peripheral antitussive

例句：

1. 1.The peripheral antitussive was effective in treating the patient's cough.
   这种周围抗咳药对患者的咳嗽有效。
2. 2. The doctor prescribed a peripheral antitussive to help relieve the patient's symptoms.
   医生开了一种周围抗咳药来帮助缓解患者的症状。
3. 3.The patient took the peripheral antitussive as directed and felt relief within a few hours.
   患者按照指示服用了周围抗咳药，几小时后感到缓解。