Montelukast is a common prescription drug used in the treatment of asthma (including exercise-induced attacks) and an itchy, stuffy, or runny nose that is the result of allergies. The medication blocks leukotriene receptors, which helps prevent a reaction to allergens. It is available as tablets, granules, and chewable tablets. How often it is taken depends on the condition montelukast is being used to treat.
Montelukast is part of a group of medications called leukotriene modifiers. Leukotrienes are chemicals produced by the body in response to allergens or other problems. In the lungs, they cause swelling and inflammation in the airways and constriction of the muscles of the respiratory tract. In the nose, leukotrienes are released after exposure to allergens (substances that cause allergies), leading to allergy symptoms.
Montelukast works by blocking leukotriene receptors, preventing these chemicals from causing allergy or asthma symptoms.