## **Core Concept**
Bronchial asthma is a chronic inflammatory disease of the airways characterized by recurring episodes of wheezing, breathlessness, chest tightness, and coughing. Management involves various classes of medications targeting inflammation, bronchospasm, and airway hyperresponsiveness.

## **Why the Correct Answer is Right**
Propranolol is a non-selective beta-blocker. Beta-blockers, especially non-selective ones like propranolol, can induce bronchoconstriction by blocking beta-2 receptors in the bronchial smooth muscle, which are responsible for causing bronchodilation. This can worsen asthma symptoms.

## **Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided, but typically, drugs used in asthma include bronchodilators (e.g., albuterol), corticosteroids (e.g., fluticasone), and leukotriene modifiers (e.g., montelukast).
* **Option B:** This option is not provided, but commonly used asthma medications include long-acting beta-agonists (LABAs) like salmeterol and formoterol.
* **Option C:** This option is not provided, but another class of drugs used in asthma are anticholinergics like ipratropium.
* **Option D:** This option is not provided, but medications like theophylline, a methylxanthine, can be used in certain cases.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **beta-2 selective agonists** (e.g., albuterol) are used for quick relief of asthma symptoms, while **non-selective beta-blockers** (e.g., propranolol) can exacerbate asthma and are generally avoided in patients with asthma.

## **Correct Answer:** . Propranolol