Which class of medication is primarily used to treat conditions related to the respiratory system?

Bronchodilators are a specific class of medication that plays a crucial role in treating conditions related to the respiratory system, particularly those that involve airway obstruction, such as asthma and chronic obstructive pulmonary disease (COPD). These medications work by relaxing the muscles around the airways, thereby widening them and making it easier for patients to breathe. This action is essential for alleviating symptoms like wheezing, shortness of breath, and chest tightness.

In contrast, while antibiotics are important for treating bacterial infections, they do not specifically target respiratory conditions unless those conditions are caused by bacterial infections. Aspirin, which is an analgesic and anti-inflammatory agent, is used primarily for pain relief and cardiovascular protection, rather than directly addressing respiratory issues. Anti-inflammatory agents can play a role in managing inflammation in the airways but are less effective in directly relieving immediate bronchoconstriction compared to bronchodilators. Thus, the primary focus on treating respiratory conditions with bronchodilators makes them the correct choice for this question.