Asthma is a long-term disease.
Asthma includes: Difficulty breathing because of narrowed airways (this narrowing of airways worsens and improves in response to various conditions); sensitive airways that react to many things eg, cigarette smoke, pollen, cold air or exercise; swelling (inflammation) in the lining of the airways.
Symptoms of Asthma: Coughing, wheezing and chest tightness.
Pharmacology: Montelukast sodium is a leukotriene receptor antagonist that blocks substances called leukotrienes. Leukotrienes cause narrowing and swelling of airways in the lungs. By blocking leukotrienes, montelukast sodium improves asthma symptoms and helps control asthma.