Which medication could be dangerous for a patient with asthma?

The selection of beta-blockers as a medication that could be dangerous for a patient with asthma is based on how this class of drugs works in the body. Beta-blockers primarily work by blocking beta-adrenergic receptors, which can lead to bronchoconstriction in individuals with asthma. This is because beta-2 receptors, which are responsible for dilating the bronchial passages, may also be affected by beta-blockers, especially non-selective ones that block both beta-1 and beta-2 receptors.

For patients with asthma, maintaining open airways is crucial for their respiratory health. Medications that may constrict airways or exacerbate bronchial hyperreactivity can lead to increased symptoms and potentially life-threatening asthma exacerbations.

In contrast, antihistamines are often used to alleviate allergy symptoms and do not have a significant negative impact on asthma control. Corticosteroids are commonly used to reduce inflammation in the airways and are a mainstay treatment for managing asthma. Bronchodilators are medications specifically designed to relax the muscles around the airways, making them essential for treating asthma symptoms. Thus, while other options play supportive or therapeutic roles in asthma management, beta-blockers pose a risk for exacerbating the condition.