Which medication is classified as a short-acting beta-2 agonist (SABA)?

Albuterol is classified as a short-acting beta-2 agonist (SABA) because it selectively stimulates beta-2 adrenergic receptors in the bronchial smooth muscle, leading to bronchodilation. This action provides rapid relief from asthma symptoms, typically within minutes, which is why it's often used as a rescue inhaler during asthma attacks or asthmatic symptoms. SABAs like albuterol are commonly recommended for quick relief and are essential in the management of acute asthma episodes.

In contrast, montelukast is a leukotriene receptor antagonist that helps prevent asthma attacks but does not provide immediate relief. Fluticasone is an inhaled corticosteroid that aims to control inflammation and prevent symptoms over time rather than providing quick rescue. Formoterol is classified as a long-acting beta-2 agonist (LABA), which is effective for prolonged bronchodilation but not for immediate symptom relief like that provided by SABAs.