Long-term marijuana use can lead to which condition?

• A. Lung cancer
• B. Chronic bronchitis
• C. Pneumonia
• D. Emphysema

Answer: (B)

Long-term exposure to inhaled smoke irritates the airways, triggering inflammation and increased mucus production. This combination produces a persistent productive cough known as chronic bronchitis. Marijuana smoke contains many of the same irritants and inflammatory compounds as tobacco, and deeper inhalation with longer breath-holds can amplify airway irritation, promoting mucus gland enlargement and goblet cell hyperplasia over time. Because the airways remain chronically irritated, coughing and mucus production persist for months to years, making chronic bronchitis the most likely long-term respiratory consequence among the options.

Lung cancer is more strongly linked to tobacco exposure, and the evidence linking marijuana alone to cancer risk is less clear. Pneumonia is an acute infection, not a chronic airway change, and emphysema involves destruction of alveolar walls with a strong association to tobacco use rather than marijuana alone.