Which of the following is a common class of asthma medications delivered by inhalers?

• A. Beta-adrenergic agonists
• B. Statins
• C. Antibiotics
• D. Anticoagulants

Answer: (A)

Beta-adrenergic agonists are a common class of asthma medications delivered by inhalers because they quickly relax the smooth muscles lining the airways, opening the bronchial tubes and improving airflow. They work by stimulating beta-2 receptors in the lungs, which causes bronchodilation and relief of wheezing and shortness of breath. Inhalers allow the medicine to reach the lungs rapidly with minimal systemic effects. There are short-acting forms (used for rapid relief during an asthma attack) and long-acting forms (used for ongoing control, often in combination with other controllers). In contrast, the other options listed are not standard inhaled asthma medications: statins lower cholesterol, antibiotics treat infections, and anticoagulants prevent blood clots.