Why might it be dangerous for a heavy smoker to use cough suppessants?

Heavy smokers may have underlying respiratory issues, such as chronic bronchitis or emphysema, that can lead to the accumulation of mucus in the airways. Using cough suppressants can mask these symptoms, preventing the body from clearing mucus and increasing the risk of infections or exacerbating existing conditions. Additionally, suppressing a natural cough reflex may delay necessary medical evaluation and treatment, potentially worsening the smoker's overall health.