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What is the least likely treatment option for an adult with acute bronchitis?

  1. Expectorants

  2. Antibiotics

  3. Bronchodilators

  4. Antitussives

The correct answer is: Antibiotics

In the context of treating acute bronchitis in adults, the least likely treatment option is antibiotics. Acute bronchitis is predominantly caused by viral infections, which do not respond to antibiotics. The primary focus in managing acute bronchitis is to relieve symptoms rather than eliminate the infection, since the body's immune system effectively handles viral pathogens. Expectorants can be beneficial as they help to loosen mucus, making it easier to cough up. Bronchodilators may also be useful in cases where wheezing or significant bronchospasm is present, easing breathing difficulties. Antitussives are often recommended to suppress a persistent cough, particularly if it interferes with sleep or daily activities. However, antibiotics are typically unnecessary and ineffective for this condition, reinforcing their status as the least likely treatment option.