Which conditions is montelukast indicated for?

Montelukast is indicated for the prevention of exercise-induced bronchoconstriction, making this the appropriate choice. It is a leukotriene receptor antagonist that helps to manage and prevent asthma symptoms and allergic rhinitis. By blocking leukotrienes, substances in the body that can cause inflammation and bronchoconstriction, montelukast effectively helps in reducing the airway narrowing that can occur during physical activity, thereby allowing individuals to engage in exercise without triggering asthma symptoms.

The other conditions listed do not align with the approved uses for montelukast. For instance, acute bronchitis is typically caused by viral infections and does not generally benefit from medication like montelukast. Pneumonia, an infection of the lungs, requires specific antibiotic treatment rather than a leukotriene receptor antagonist. Chronic obstructive pulmonary disease often necessitates different therapeutic approaches, including bronchodilators and steroids, rather than montelukast as first-line treatment.