Montelukast is the generic form of the brand-name medication Singulair. It is a receptor blocker used to treat asthma, exercise-induced asthma, hay fever, and allergies by reducing constriction and inflammation in the lungs.

Founded in 1986, Aurobindo Pharma is one of the largest pharmaceutical companies in India and distributes around 214 drugs in the U.S. Aurobindo serves more than 150 countries through its range of product offerings. The company has 27 manufacturing sites including in India and the U.S.