Which medication is often used for acute asthma attacks, acting as a bronchodilator?

Albuterol is a medication that is commonly used during acute asthma attacks due to its effectiveness as a bronchodilator. It works by stimulating beta-2 adrenergic receptors in the bronchial smooth muscle, leading to relaxation and dilation of the airways. This process allows for improved airflow and relief from the symptoms of bronchospasm that occur during an asthma attack.

This quick-acting medication can provide immediate relief and is typically administered via an inhaler or nebulizer, making it easily accessible during an acute episode. The action of albuterol is both rapid and effective, often leading to noticeable improvements in breathing within minutes, which is critical during an asthma emergency.

In contrast, other medications mentioned are used for different purposes. Prednisone is a corticosteroid that helps reduce inflammation but is not effective for immediate bronchodilation during an acute attack. Fluticasone is also a corticosteroid, primarily used for long-term management and prevention of asthma symptoms rather than for acute relief. Diphenhydramine is an antihistamine that can help with allergic reactions but does not work as a bronchodilator for asthma. Therefore, albuterol is the preferred choice in situations requiring immediate action to relieve acute asthma symptoms.