Montelukast Sodium is used as an active pharmaceutical ingredient (API) in the manufacture of medications for the prevention and long-term treatment of asthma and the relief of symptoms associated with allergic rhinitis.

The purpose of Montelukast Sodium is to block cysteinyl leukotriene (CysLT1) receptors thereby reducing airway inflammation preventing bronchoconstriction and improving symptoms of asthma and seasonal or perennial allergic rhinitis.

Montelukast Sodium is the sodium salt of montelukast a selective leukotriene receptor antagonist that inhibits the action of leukotrienes inflammatory mediators involved in asthma and allergic reactions and is widely used in oral pharmaceutical formulations.