What is a common agent used in rescue medications for asthma?

The use of inhaled short-acting beta-2 agonists in rescue medications for asthma is well-established due to their rapid action in relieving bronchospasm. These medications work by stimulating beta-2 adrenergic receptors in the airway smooth muscle, leading to immediate relaxation and dilation of the bronchial passages. This effect provides quick relief from acute asthma symptoms such as wheezing, shortness of breath, and chest tightness during an asthma attack.

In contrast, inhaled corticosteroids are primarily used for long-term control and prevention of asthma symptoms by reducing inflammation in the airways, rather than addressing acute episodes. Oral leukotriene antagonists also serve a similar chronic management purpose and do not act quickly enough to be considered rescue medications. Aerosolized cromolyn, while helpful for some patients, is not as commonly used for immediate relief as it primarily serves as a preventive agent rather than a fast-acting rescue inhaler.

Therefore, the choice of inhaled short-acting beta-2 agonists as the common agent for rescue medications reflects their effectiveness and speed in treating acute asthma symptoms, making them essential for asthma management plans.