Leukotriene receptor antagonists

Leukotriene receptor antagonists block leukotrienes, which cause airway inflammation, airway narrowing, and mucus production. Montelukast is used for long-term asthma control, preventing exercise-induced bronchospasm, and seasonal allergies. It is taken once daily, usually in the evening, and it does not relieve a sudden asthma attack. It carries a boxed warning for mood and behavior changes such as agitation, depression, sleep problems, and suicidal thoughts.

• MontelukastKnown brand names include Singulair.