Montelukast

Generic name: montelukast [ mon-te-LOO-kast ]
Brand name: Singulair
Dosage forms: oral granule (4 mg); oral tablet (10 mg); oral tablet, chewable (4 mg; 5 mg)
Drug class:Leukotriene modifiers

Medically reviewed by Drugs.com on Jun 10, 2021. Written by Cerner Multum.

What is montelukast?

Montelukast is a leukotriene (loo-koe-TRY-een) inhibitor that is used to prevent asthma attacks in adults and children at least 2 years old. Montelukast is also used to prevent exercise-induced bronchoconstriction (narrowing of the air passages in the lungs) in adults and children who are at least 6 years old.

Montelukast is also used to treat symptoms of seasonal or year-round (perennial) allergies in adults and children at least 2 years old, after other treatments did not work.

If you already take montelukast to prevent asthma or allergy symptoms, do not use an extra dose to treat exercise-induced bronchoconstriction.

Montelukast may also be used for purposes not listed in this medication guide.

Warnings

Tell your doctor right away if you have signs of blood vessel inflammation: flu-like symptoms, severe sinus pain, a skin rash, numbness or a "pins and needles" feeling in your arms or legs.

Stop taking montelukast and call your doctor right away if you have any unusual changes in mood or behavior (such as agitation, confusion, depression, sleep problems, compulsive behaviors, hallucinations, or suicidal thoughts or actions).

Before taking this medicine

You should not use montelukast i...