<unk> , sold under the brand name Singulair among others, is a medication used in the maintenance treatment of asthma. It is generally less preferred for this use than inhaled corticosteroids. It is not useful for acute asthma attacks. Other uses include allergic rhinitis and hives of long duration. For allergic rhinitis it is a second-line treatment. Common side effects include abdominal pain, cough, and headache. Severe side effects may include allergic reactions, such as anaphylaxis and eosinophilia. Use in pregnancy appears to be safe.<unk>  is in the leukotriene receptor antagonist family of medications. It works by blocking the action of leukotriene D4 in the lungs resulting in decreased inflammation and relaxation of smooth muscle.<unk>  was approved for medical use in the United States in 1998. It is available as a generic medication. In 2019, it was the fourteenth most commonly prescribed medication in the United States, with more than 32 million prescriptions.
Montelukast
Seratrodast
Pranlukast
Azelastine
Zafirlukast
Roxadustat
Allergan
Lifitegrast