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Home Knowledge Center Wellness Library montelukast

montelukast

Pronunciation: mon te LOO kast

Brand: Singulair

Singulair

slide 1 of 26, Singulair,

10 mg, square, brown, imprinted with SINGULAIR, MSD 117

Image of Singulair
slide 1 of 26

Montelukast Sodium

slide 2 of 26, Montelukast Sodium,

10 mg, round, brown, imprinted with 54 157

Image of Montelukast Sodium
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Montelukast Sodium

slide 3 of 26, Montelukast Sodium,

4 mg, oval, pink, imprinted with 54 144

Image of Montelukast Sodium
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Montelukast Sodium

slide 4 of 26, Montelukast Sodium,

5 mg, round, pink, imprinted with 54 741

Image of Montelukast Sodium
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Montelukast Sodium

slide 5 of 26, Montelukast Sodium,

4 mg, triangular, pink, imprinted with TV, 7424

Image of Montelukast Sodium
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Montelukast Sodium

slide 6 of 26, Montelukast Sodium,

5 mg, square, pink, imprinted with TV, 7425

Image of Montelukast Sodium
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Montelukast Sodium

slide 7 of 26, Montelukast Sodium,

10 mg, round, brown, imprinted with TV, 7426

Image of Montelukast Sodium
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Montelukast Sodium

slide 8 of 26, Montelukast Sodium,

4 mg, round, pink, cherry, imprinted with SZ 74

Image of Montelukast Sodium
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Montelukast Sodium

slide 9 of 26, Montelukast Sodium,

5 mg, round, pink, imprinted with SZ 76

Image of Montelukast Sodium
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Montelukast Sodium

slide 10 of 26, Montelukast Sodium,

4 mg, oval, pink, imprinted with 4MG, 1079

Image of Montelukast Sodium
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Montelukast Sodium

slide 11 of 26, Montelukast Sodium,

5 mg, round, pink, imprinted with 5 MG, 1080

Image of Montelukast Sodium
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Montelukast Sodium

slide 12 of 26, Montelukast Sodium,

10 mg, round, white, imprinted with KU, 210

Image of Montelukast Sodium
slide 12 of 26

Montelukast Sodium

slide 13 of 26, Montelukast Sodium,

4 mg, round, pink, imprinted with KU, 204

Image of Montelukast Sodium
slide 13 of 26

Montelukast Sodium

slide 14 of 26, Montelukast Sodium,

5 mg, round, pink, imprinted with KU, 205

Image of Montelukast Sodium
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Montelukast Sodium

slide 15 of 26, Montelukast Sodium,

10 mg, square, brown, imprinted with R, 725

Image of Montelukast Sodium
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Montelukast Sodium

slide 16 of 26, Montelukast Sodium,

10 mg, square, beige, imprinted with APO, M10

Image of Montelukast Sodium
slide 16 of 26

Montelukast Sodium

slide 17 of 26, Montelukast Sodium,

10 mg, round, white, imprinted with KU, 210

Image of Montelukast Sodium
slide 17 of 26

Montelukast Sodium

slide 18 of 26, Montelukast Sodium,

10 mg, round, beige, imprinted with E225

Image of Montelukast Sodium
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Montelukast Sodium

slide 19 of 26, Montelukast Sodium,

10 mg, square, brown, imprinted with M 10

Image of Montelukast Sodium
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Montelukast Sodium

slide 20 of 26, Montelukast Sodium,

10 mg, square, beige, imprinted with I, 114

Image of Montelukast Sodium
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Montelukast Sodium

slide 21 of 26, Montelukast Sodium,

10 mg, round, brown, imprinted with 10MG, 1081

Image of Montelukast Sodium
slide 21 of 26

Montelukast Sodium

slide 22 of 26, Montelukast Sodium,

10 mg, square, beige, imprinted with 114, I

Image of Montelukast Sodium
slide 22 of 26

Montelukast Sodium

slide 23 of 26, Montelukast Sodium,

10 mg, square, beige, imprinted with I, 114

Image of Montelukast Sodium
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Singulair

slide 24 of 26, Singulair,

10 mg, square, beige, imprinted with SINGULAIR, MRK 117

Image of Singulair
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Singulair

slide 25 of 26, Singulair,

4 mg, oval, pink, cherry, imprinted with SINGULAIR, MRK 711

Image of Singulair
slide 25 of 26

Singulair

slide 26 of 26, Singulair,

5 mg, round, pink, cherry, imprinted with SINGULAIR, MRK 275

Image of Singulair
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What is the most important information I should know about montelukast?

What is the most important information I should know about montelukast?

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 this medicine 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).

What is montelukast?

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.

What should I discuss with my healthcare provider before taking montelukast?

What should I discuss with my healthcare provider before taking montelukast?

You should not use montelukast if you are allergic to it.

Tell your doctor if you have ever had:

  • mental illness or psychosis; or
  • asthma, or a history of severe allergic reaction (sneezing, runny or stuffy nose, wheezing, shortness of breath) after taking aspirin or another NSAID.

The chewable tablet may contain phenylalanine and could be harmful if you have phenylketonuria (PKU).

Tell your doctor if you are pregnant or breastfeeding.

Do not give this medicine to a child without a doctor's advice.

How should I take montelukast?

How should I take montelukast?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Montelukast is not a fast-acting rescue medicine for asthma attacks. Seek medical attention if your breathing problems get worse quickly, or if you think your medications are not working.

Montelukast is usually taken once every evening, with or without food.

For exercise-induced bronchoconstriction, take a single dose at least 2 hours before exercise, and do not take another dose for at least 24 hours.

Swallow the regular tablet whole, with a glass of water.

You must chew the chewable tablet before you swallow it.

Place the oral granules directly in your mouth and swallow, or mix them with applesauce, mashed carrots, rice, or ice cream. The granules may also be mixed with baby formula or breast milk. Do not use any other type of liquid. Use the mixture within 15 minutes. Do not save for later use.

If you also use an oral steroid medication, you should not stop using it suddenly. Follow your doctor's instructions about tapering your dose.

Do not change your dose or stop using asthma medication without your doctor's advice.

Store at room temperature away from moisture and heat. Do not open a packet of oral granules until you are ready to use the medicine.

What happens if I miss a dose?

What happens if I miss a dose?

Skip the missed dose and use your next dose at the regular time. Do not use two doses at one time.

What happens if I overdose?

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while taking montelukast?

What should I avoid while taking montelukast?

Avoid situations or activities that may trigger an asthma attack.

If your asthma symptoms get worse when you take aspirin, avoid taking aspirin or other NSAIDs (nonsteroidal anti-inflammatory drugs) such as ibuprofen (Advil, Motrin), naproxen (Aleve), celecoxib, diclofenac, indomethacin, meloxicam, and others.

What are the possible side effects of montelukast?

What are the possible side effects of montelukast?

Get emergency medical help if you have signs of an allergic reaction: hives, blisters, severe itching; difficult breathing; swelling of your face, lips, tongue, or throat.

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.

Some people using montelukast have had new or worsening mental problems. Stop taking this medicine and call your doctor right away if you have unusual changes in mood or behavior, such as:

  • agitation, aggression, feeling restless or irritable;
  • anxiety, depression, confusion, problems with memory or attention;
  • stuttering, tremors, uncontrolled muscle movements;
  • suicidal thoughts or actions;
  • hallucinations, sleep problems, vivid, dreams, sleep-walking; or
  • compulsive or repetitive behaviors.

Common side effects may include:

  • stomach pain, diarrhea;
  • fever or other flu symptoms;
  • ear pain or full feeling, trouble hearing;
  • headache; or
  • cold symptoms such as runny or stuffy nose, sinus pain, cough, sore throat.

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 other drugs will affect montelukast?

What other drugs will affect montelukast?

Other drugs may affect montelukast, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all other medicines you use.

Where can I get more information?

Where can I get more information?

Your pharmacist can provide more information about montelukast.

This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.

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