A nurse is educating a patient about the use of antitussive medications. Which statement by the patient indicates a need for further teaching?

"I should avoid antitussives if I have a productive cough with mucus."

"Antitussives are helpful in clearing mucus from my lungs during a productive cough."

"Using antitussives for a productive cough can lead to mucus buildup in my airways."

"Antitussives are used to suppress a dry, nonproductive cough."