decongestant

例句：

1. 1.This decongestant helps relieve congestion in the nose and throat.
   这种去充血剂有助于缓解鼻子和喉咙的充血。
2. 2. The doctor prescribed a decongestant to help him breathe easier.
   医生开了一种去充血剂来帮助他呼吸更轻松。
3. 3. After taking the decongestant, he felt much better and was able to return to his normal activities.
   服用了去充血剂后，他感觉好多了，能够恢复正常活动。