Which drug is used as a rescue therapy in asthma?

Albuterol is commonly used as a rescue therapy for asthma due to its rapid onset of action and effectiveness in relieving acute bronchospasm. It is a short-acting beta-2 adrenergic agonist, which means it works by stimulating beta-2 receptors in the lungs, leading to quick relaxation of bronchial smooth muscles and resulting in dilation of the airways. This rapid relief is essential during an asthma attack when a patient experiences wheezing, shortness of breath, or tightness in the chest.

Rescue inhalers containing albuterol are typically prescribed for patients to carry at all times, allowing them to manage acute symptoms effectively. In contrast, medications like salmeterol are long-acting beta-2 agonists that are generally used for maintenance therapy rather than immediate relief; fluticasone is an inhaled corticosteroid that helps to reduce inflammation in the airways but is not used for prompt symptom relief; and ipratropium is an anticholinergic agent that can provide some relief but is not the first-line treatment for acute asthma symptoms. Therefore, albuterol stands out as the principal choice for rescue therapy in asthma management.