Which of the following is NOT included in the treatment for asthma?

The correct choice is based on the understanding of how asthma is typically managed. For asthma treatment, beta-2 agonists and corticosteroids play a key role in dilating the airways and reducing inflammation, respectively.

Beta-2 agonists, such as albuterol, are bronchodilators used for quick relief during asthma attacks. Corticosteroids, like prednisone, are used to control chronic inflammation in the airways and thus improve long-term management of asthma.

Antihistamines can relieve allergy symptoms but are not a primary treatment for asthma itself since asthma involves bronchoconstriction and inflammation rather than allergic histamine release exclusively.

Alpha agonists do not typically play a significant role in the treatment of asthma. While they may be used in some contexts for other respiratory conditions, they are not standard treatment options for asthma management. Understanding the specific action of these drug classes helps identify which is not commonly included in asthma treatment.