Which class of drugs is primarily used to treat asthma and COPD?

Bronchodilators are the primary class of drugs used to treat asthma and Chronic Obstructive Pulmonary Disease (COPD) because they work by relaxing the muscles around the airways, leading to increased airflow and improved breathing. This class includes short-acting and long-acting agents that help alleviate symptoms such as wheezing, coughing, and shortness of breath. They are crucial for both immediate relief during asthma attacks and for long-term management in conditions like COPD.

Corticosteroids are also important in the management of asthma, particularly for reducing inflammation and preventing exacerbations, but they do not directly relax the airway muscles. Antihistamines are primarily used for allergic reactions and nasal symptoms, while antibiotics are used to treat bacterial infections and are not appropriate for the management of asthma or COPD, which are primarily inflammatory and obstructive conditions. Thus, bronchodilators remain the mainstay in treating these respiratory disorders.