Singulair Information - Side Effects, Drug Interactions, Conditions
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Singulair

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Most Commonly Used
Drug Image file DrugItem_7138.JPG
Singulair 10mg Tab
Merck Sharp & Dohme Corp., a Subsidiary of Merck & Co., Inc.
Pill Identification: MRK 117  |  SINGULAIR
Drug Image file DrugItem_7140.JPG
Singulair 5mg Chw Tab
Merck Sharp & Dohme Corp., a Subsidiary of Merck & Co., Inc.
Pill Identification: SINGULAIR  |  MRK 275
Drug Image file DrugItem_7139.JPG
Singulair 4mg Chw Tab
Merck Sharp & Dohme Corp., a Subsidiary of Merck & Co., Inc.
Pill Identification: SINGULAIR  |  MRK 711
Drug Image file DrugItem_16563.JPG
Singulair 10mg Tab
Merck Sharp & Dohme Corp., a Subsidiary of Merck & Co., Inc.
Pill Identification: MSD 117  |  SINGULAIR
Drug Image file default-drug-image.png
Singulair 4mg Granules
Overview Information on Singulair
Pharmacist Tip
Tablets should be swallowed whole with a full glass of water.     
Singulair® is the brand name for a medicine called montelukast. Your doctor may have given you Singulair to manage your asthma and to prevent further attacks. Singulair is also given to prevent tightening of your airways during exercise, which is called exercise-induced bronchoconstriction (EIB), and to treat seasonal allergies.

Singulair works by blocking the release of certain chemicals in the body called leukotrienes. These chemicals cause swelling, tightening, and inflammation in the lungs and airways, which are found in people with asthma, EIB, and allergies.

To get the most benefit from taking Singulair, take it exactly as your doctor tells you to. Singulair is not meant to treat asthma attacks once they have already begun. Your doctor may want you to keep an asthma rescue inhaler on hand in case an asthma attack does happen. Take Singulair every day, even if you have no asthma symptoms. Let your doctor know if asthma attacks happen frequently. Your doctor will want to know so that he or she can adjust your Singulair prescription.

Singulair is available as tablets and chewable tablets. Singulair also comes as packets of granules, which can be administered to a child directly by spoon or mixed in with breast milk, formula, or soft food. It is important that the only soft foods that Singulair is mixed with are applesauce, carrots, rice, or ice cream. Use Singulair oral granules within 15 minutes after opening the packet. The food should be room temperature or colder. Throw away any uneaten portion.

Before taking Singulair, tell your doctor about any health issues you may have. He or she may specifically ask whether you've had an allergic reaction to any medicines, including montelukast and aspirin. Before taking Singulair, tell your doctor about any medicines you take, even over-the-counter medicines, herbal remedies, vitamins, and supplements. Patients who have phenylketonuria (PKU) should be advised that chewable Singulair tablets contain phenylalanine. Let your doctor know if you are pregnant, breast-feeding, or planning to become pregnant.

Singulair may cause side effects. The more common side effects of Singulair include:
  • Headache
  • Sore throat
  • Cough
  • Fever
  • Stomach pain
  • Diarrhea
  • Ear infection
  • Tooth infection
  • Runny nose
  • Influenza (flu)
More serious side effects can happen when taking Singulair. Call your doctor right away, or 911 in an emergency, if you notice:
  • Signs of an allergic reaction: itching, hives, or swelling of the face, lips, or throat, which can cause trouble breathing
  • Extreme changes in behavior or mood
  • Restlessness, anxiety, or irritability
  • Irregular heartbeat
  • Seizures or tremors
  • Unusual bruising or bleeding
  • Numbness or swelling in hands, arms, feet, or legs
  • Yellowing of the skin or whites of eyes
  • Worsening of an asthma attack
This is not a complete list of side effects of Singulair. Tell your doctor about any symptoms you notice while taking Singulair.


Clinical Review by Jodi Grimm, RPh and Ann Ciemnoczolowski, MS, ELS on May 15, 2013
Singulair® is the brand name for a medicine called montelukast. Your doctor may have given you Singulair to manage your asthma and to prevent further attacks. Singulair is also given to prevent tightening of your airways during exercise, which is called exercise-induced bronchoconstriction (EIB), and to treat seasonal allergies.

Singulair works by blocking the release of certain chemicals in the body called leukotrienes. These chemicals cause swelling, tightening, and inflammation in the lungs and airways, which are found in people with asthma, EIB, and allergies.

To get the most benefit from taking Singulair, take it exactly as your doctor tells you to. Singulair is not meant to treat asthma attacks once they have already begun. Your doctor may want you to keep an asthma rescue inhaler on hand in case an asthma attack does happen. Take Singulair every day, even if you have no asthma symptoms. Let your doctor know if asthma attacks happen frequently. Your doctor will want to know so that he or she can adjust your Singulair prescription.

Singulair is available as tablets and chewable tablets. Singulair also comes as packets of granules, which can be administered to a child directly by spoon or mixed in with breast milk, formula, or soft food. It is important that the only soft foods that Singulair is mixed with are applesauce, carrots, rice, or ice cream. Use Singulair oral granules within 15 minutes after opening the packet. The food should be room temperature or colder. Throw away any uneaten portion.

Before taking Singulair, tell your doctor about any health issues you may have. He or she may specifically ask whether you've had an allergic reaction to any medicines, including montelukast and aspirin. Before taking Singulair, tell your doctor about any medicines you take, even over-the-counter medicines, herbal remedies, vitamins, and supplements. Patients who have phenylketonuria (PKU) should be advised that chewable Singulair tablets contain phenylalanine. Let your doctor know if you are pregnant, breast-feeding, or planning to become pregnant.

Singulair may cause side effects. The more common side effects of Singulair include:
  • Headache
  • Sore throat
  • Cough
  • Fever
  • Stomach pain
  • Diarrhea
  • Ear infection
  • Tooth infection
  • Runny nose
  • Influenza (flu)
More serious side effects can happen when taking Singulair. Call your doctor right away, or 911 in an emergency, if you notice:
  • Signs of an allergic reaction: itching, hives, or swelling of the face, lips, or throat, which can cause trouble breathing
  • Extreme changes in behavior or mood
  • Restlessness, anxiety, or irritability
  • Irregular heartbeat
  • Seizures or tremors
  • Unusual bruising or bleeding
  • Numbness or swelling in hands, arms, feet, or legs
  • Yellowing of the skin or whites of eyes
  • Worsening of an asthma attack
This is not a complete list of side effects of Singulair. Tell your doctor about any symptoms you notice while taking Singulair.


Clinical Review by Jodi Grimm, RPh and Ann Ciemnoczolowski, MS, ELS on May 15, 2013

CVS Patient Statistics for Singulair
Usage by Age
52.7%
under20_base
8.9%
20to40_base
19.93%
40to60_base
18.47%
over60_base
Most Commonly Used By CVS Patients
Usage by Gender
female_fill_graph
54.91%
female_fill_graph
male_fill_graph
45.09%
male_fill_graph
Learn More About Singulair
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Patient Experiences with Singulair

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