Which of the following is NOT a category of antiasthmatic agents?

Antiasthmatic agents are specifically designed to treat and manage asthma and related respiratory conditions. These agents work by reducing inflammation, opening airways, or stabilizing mast cells to prevent the release of histamine and other mediators that contribute to asthma symptoms.

Corticosteroids are a critical category of antiasthmatic agents because they help reduce inflammation in the airways, making it easier for patients to breathe. Mast cell stabilizers prevent mast cells from releasing substances that cause inflammation, also playing a significant role in asthma management. Bronchodilators work by relaxing the muscles around the airways, allowing them to open up and facilitate easier airflow.

Antidepressants, however, are not classified as antiasthmatic agents. Their primary purpose is to treat various forms of depression and anxiety, not to address asthma or respiratory conditions. Therefore, it is accurate to identify antidepressants as the category that does not belong among the antiasthmatic agents.