What are rescue inhalers primarily classified as?

Rescue inhalers are primarily classified as bronchodilators because they work by relaxing and opening the airways to facilitate easier breathing during an asthma attack or other respiratory distress. These medications provide rapid relief by acting quickly to relieve symptoms such as wheezing, coughing, and shortness of breath. Common examples of bronchodilators used in rescue inhalers include albuterol and levalbuterol, which target the beta-2 adrenergic receptors in the lungs.

In contrast, antihistamines are primarily used to treat allergic reactions by blocking histamine receptors, and are not effective in quickly alleviating respiratory distress. Corticosteroids are anti-inflammatory medications that help in managing chronic conditions by reducing inflammation over time but are not intended for immediate symptom relief. Antibiotics, while crucial for treating infections, have no role in bronchodilation and are not used for immediate respiratory relief. Therefore, the classification of rescue inhalers as bronchodilators highlights their role in acute respiratory situations.