Which of the following is a type of controller medication for asthma?

Corticosteroids are considered a type of controller medication for asthma because they work by reducing inflammation in the airways, which helps to prevent asthma symptoms from occurring. These medications are typically taken daily to provide long-term control of asthma, making them effective in managing chronic inflammation and preventing exacerbations.

In contrast, short-acting beta2 agonists (SABAs) are classified as rescue medications, used for quick relief during an asthma attack rather than for long-term control. Antihistamines primarily address allergic reactions and are not specifically designed for asthma control. Oral steroids can be used for exacerbations but are not intended for regular, long-term use like corticosteroids. Therefore, corticosteroids are recognized for their role in maintaining asthma control over time.