Singulair is an oral LTRA (leukotriene receptor antagonist).
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Drug Uses

Singulair is used to prevent and treat asthma. It is also used to relieve runny nose and sneezing that caused by allergens in adults and children as young as 6 month old. Also Singulair is used to prevent exercise-inducted bronchial-constriction (air passages narrowing in the lungs) in people who are not already taking Singulair for other conditions.

How Taken

Don't take Singulair in larger amounts, or take for longer time than recomended for you. Take it exactly as it was prescribed. Usually Singulair is taken 1 time per day (in the evenings). For exersise-induced bronchial-constriction take a single dose of Singulair 2 hours before exercise. If you use chewing tablets, chew it completely before swallowing.

More Information

Singulair (Montelukast) is a leukotriene inhibitor. Leukotrienes – are substances (chemicals) in your body that releases when you breathe in allergen stuff. These chemicals cause swelling in the lungs, and then tightening the muscles around your airways, which consequently cause the asthma symptoms.


Don't use Singulair to cure an asthma attack that has already begun (it will not work fast enough to reverse the symptoms); you should use a fast acting medication in this case. If you already take Singulair for asthma or allergy symptoms, don't use it for exersise-induced bronchial-constriction. Tell your doctor if you have kidney problems, liver problems, if you are pregnant, or planning to become pregnant (or you are breast feeding mom). Always ask your doctor for dosage changes.

Possible Side Effects

Singulair may cause the following side effects: headache, stomach pain, heartburn, nausea, diarrhea, tooth pain, fever, stuffy nose, sore throat, cough, hoarsness, mild rash and tired feeling. Contact your doctor for advice about side effects or call medical care service.