Montelukast (Generic Singular) is a leukotriene inhibitor used to control symptoms of asthma and breathing difficulties in adults and children, and to treat symptoms of year-round or seasonal allergies. Generic montelukast has the same active ingredients and effectiveness as brand-name Singulair.
What is montelukast used for?
Montelukast is prescribed to prevent asthma attacks in adults and children 12 months or older. It can prevent the narrowing of airways from exercise-induced bronchoconstriction in adults and children six years or older. It is not a rescue medication.
Montelukast can be prescribed for adults and children six months or older with severe year-round allergies, or for seasonal allergies in adults and children two years or older when other medications don’t work.
How montelukast works
Montelukast is a leukotriene receptor antagonist (LTRA). This non-steroid oral medication blocks a chemical reaction in the airways that can lead to inflammation.
Most common side effects of montelukast
Severe side effects:
Difficulty breathing or swallowing
Swelling in the face, lips, eyes, tongue, or throat
Itching, rash, or hives
Flu-like symptoms with rash, numbness in the arms or legs, or sinus pain and swelling
Blistering or peeling skin
Ear pain and fever (in children)
Other serious mental health side effects:
Bad or vivid dreams
Suicidal thoughts or actions
Disorientation or confusion
Irritability or restlessness
Uncontrolled muscle movements
Chewable montelukast tablets contain aspartame, so tell your doctor if you have phenylketonuria (PKU).
Montelukast dosage information
Tablet (10 mg)
Chewable tablet (4 mg, 5 mg)
Granules (4 mg)
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