SILVER SPRING, Md. — The Food and Drug Administration has approved several generic versions of a drug used to treat asthma and allergies, the agency said Friday.
The FDA announced the approval of montelukast sodium, a drug indicated for controlling asthma symptoms and relieving indoor and outdoor allergies.
The drug is a generic version of Merck's Singulair, which had sales of $4.6 billion in 2011, according to IMS Health.