A nurse is reinforcing teaching with a client who is going to take an expectorant to manage a cough. The nurse should explain that this type of medication treats coughs by which of the following mechanisms?

A. Reduces inflammation: That’s the mechanism of inhaled corticosteroids and some anti-inflammatory agents, not expectorants. B. Dries mucous membranes: Anticholinergics dry secretions; expectorants do the opposite. C. Stimulates secretions: Expectorants (e.g., guaifenesin) increase bronchial secretions or thin mucus, making coughs more productive and easier to clear. D. Suppresses the urge to cough: Antitussives suppress cough; expectorants promote productive coughing.