Medications and Drugs
Brand Names: Singulair
Generic Name: montelukast (Pronunciation: mon te LOO kast)
What is montelukast (Singulair)?
Montelukast is a leukotriene (loo-koe-TRY-een) inhibitor. Leukotrienes are chemicals your body releases when you breathe in an allergen (such as pollen). These chemicals cause swelling in your lungs and tightening of the muscles around your airways, which can result in asthma symptoms.
Montelukast is used to prevent asthma attacks in adults and children as young as 12 months old. Montelukast is also used to prevent exercise-induced bronchospasm in adults and children who are at least 6 years old.
Montelukast is also used to treat symptoms of year-round (perennial) allergies in adults and children who are at least 6 months old. It is also used to treat symptoms of seasonal allergies in adults and children who are at least 2 years old.
Do not give this medication to a child without a doctor's advice.
Montelukast is also used to prevent exercise-induced bronchoconstriction (narrowing of the air passages in the lungs) in adults and teenagers who are at least 15 years old and are not already taking this medicine for other conditions.
If you already take this medication 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.
Montelukast 10 mg-TOR
round, brown, imprinted with 10MG, 1081
Montleukast 4 mg Chew-TOR
oval, pink, imprinted with 4MG, 1079
Montleukast 5 mg Chew-TOR
round, pink, imprinted with 5 MG, 1080
Singulair 10 mg
square, beige, imprinted with SINGULAIR, MRK 117
Singulair 4 mg chewable
oval, pink, cherry, imprinted with SINGULAIR, MRK 711
Singulair 5 mg
round, pink, cherry, imprinted with SINGULAIR, MRK 275
What are the possible side effects of montelukast (Singulair)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have a serious side effect such as:
Less serious side effects may include:
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What is the most important information I should know about montelukast (Singulair)?
Montelukast will not work fast enough to treat an asthma attack that has already begun. Use only a fast-acting inhalation medicine to treat an asthma attack. Talk with your doctor if any of your asthma medications do not seem to work as well in treating or preventing attacks.
It may take up to several weeks before your symptoms improve. Keep using the medication as directed and tell your doctor if your symptoms do not improve after several weeks of treatment.
Call your doctor right away if you feel that this medicine is not working as well as usual, or if it makes your condition worse. If it seems like you need to use more of any of your medications in a 24-hour period, talk with your doctor.
If you already take this medication to prevent asthma or allergy symptoms, do not use it for exercise-induced bronchoconstriction.
Call your doctor at once if you have any mood or behavior changes, anxiety, depression, or thoughts about suicide or hurting yourself.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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