Leukotriene receptor antagonists are used to prevent which of the following symptoms in asthma patients?

Leukotriene receptor antagonists are primarily used to prevent exercise-induced bronchoconstriction in asthma patients. They work by blocking the action of leukotrienes, which are inflammatory mediators that can cause bronchial smooth muscle constriction and increased mucus production in response to various triggers, including exercise. This mechanism helps to decrease airway inflammation and improve breathing, especially during physical activity, making them effective in preventing bronchoconstriction that can occur during exercise.

Using leukotriene receptor antagonists as a preventive measure provides asthma patients with better control over their condition, allowing them to engage in physical activities without experiencing significant respiratory distress. This is particularly important for individuals who have exercise-induced symptoms and rely on medication to manage their asthma effectively.