decongestant [ˌdikənˈdʒɛstənt]

例句:

• Clenbuterol, similar to the asthma drug salbutamol, is used to treat breathing disorders as a decongestant and bronchodilator.
  来自BBC
• In the past, parents often believed that pain relief from antihistamines and decongestant's was necessary.
  过去, 家长往往认为,用抗组胺药和减充血剂来缓解疼痛是必要的.
  
• Treat nasal congestion using vapour rubs or taking decongestant drugs.
  来自BBC