Which type of medication is commonly used as a rescue inhaler for asthma?

Which type of medication is commonly used as a rescue inhaler for asthma?

• A. Long-acting beta-agonists (LABAs)
• B. Short-acting beta-agonists (SABAs)
• C. Inhaled corticosteroids
• D. Leukotriene modifiers

Answer: (B)

Short-acting beta-agonists (SABAs) are commonly used as rescue inhalers for asthma due to their rapid onset of action and effectiveness in relieving acute bronchospasm. These medications work by stimulating beta-2 adrenergic receptors in the bronchial smooth muscle, leading to relaxation and dilation of the airways. This results in quick relief of symptoms such as wheezing, shortness of breath, and chest tightness, which can occur during an asthma attack. In contrast, long-acting beta-agonists (LABAs) are not suitable for rescue use, as they are designed for maintenance therapy and have a slower onset of action. Inhaled corticosteroids primarily function as anti-inflammatory agents and are not intended for immediate relief of acute symptoms. Leukotriene modifiers work by reducing inflammation and mucus production but do not provide rapid bronchodilation, making them inappropriate as rescue medications. Therefore, the use of SABAs as rescue inhalers is critical for managing sudden exacerbations of asthma effectively.

Short-acting beta-agonists (SABAs) are commonly used as rescue inhalers for asthma due to their rapid onset of action and effectiveness in relieving acute bronchospasm. These medications work by stimulating beta-2 adrenergic receptors in the bronchial smooth muscle, leading to relaxation and dilation of the airways. This results in quick relief of symptoms such as wheezing, shortness of breath, and chest tightness, which can occur during an asthma attack.

In contrast, long-acting beta-agonists (LABAs) are not suitable for rescue use, as they are designed for maintenance therapy and have a slower onset of action. Inhaled corticosteroids primarily function as anti-inflammatory agents and are not intended for immediate relief of acute symptoms. Leukotriene modifiers work by reducing inflammation and mucus production but do not provide rapid bronchodilation, making them inappropriate as rescue medications. Therefore, the use of SABAs as rescue inhalers is critical for managing sudden exacerbations of asthma effectively.