Understanding and controlling your respiratory allergies

Montelukast

Pronunciation

Generic Name: montelukast (MON-te-LOO-kast)
Brand Name: Singulair

Montelukast is used for:

Prevention and long-term treatment of asthma. It is also used in certain patients to relieve allergy symptoms (eg, itchy, runny, or stuffy nose; sneezing) and to prevent asthma attacks caused by exercise. It may also be used for other conditions as determined by your doctor.

Montelukast is a leukotriene receptor antagonist. It works by blocking a substance called leukotriene, which helps to decrease certain asthma and allergy symptoms.

Do NOT use montelukast if:

  • you are allergic to any ingredient in montelukast

Contact your doctor or health care provider right away if any of these apply to you.

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Before using montelukast:

Some medical conditions may interact with montelukast. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • if you are pregnant, planning to become pregnant, or are breast-feeding
  • if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
  • if you have allergies to medicines, foods, or other substances
  • if you have liver problems or if you drink alcohol
  • if you have a history of mental or mood problems, or suicidal thoughts or actions
  • if you have been taking a corticosteroid (eg, prednisone) and will be stopping it or lowering the dose
  • if you are lactose intolerant

Some MEDICINES MAY INTERACT with montelukast. Tell your health care provider if you are taking any other medicines.

Ask your health care provider if montelukast may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use montelukast:

Use montelukast as directed by your doctor. Check the label on the medicine for exact dosing instructions.

  • An extra patient leaflet is available with montelukast. Talk to your pharmacist if you have questions about this information.
  • Take montelukast by mouth with or without food.
  • Continue to use montelukast even if you feel well. Do not miss any doses.
  • If you miss a dose of montelukast, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use montelukast.

Important safety information:

  • Montelukast may cause drowsiness or dizziness. These effects may be worse if you take it with alcohol or certain medicines. Use montelukast with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
  • Montelukast will not stop an asthma attack once one has started. Be sure you always carry appropriate medicine (eg, bronchodilator inhalers) with you in case of an asthma attack.
  • Contact your doctor promptly if your short-acting inhaler use increases or if use exceeds the 24-hour maximum prescribed by your doctor. Contact your doctor if your asthma worsens.
  • Do not decrease your dose or stop using montelukast or other asthma medicines without first checking with your doctor.
  • If your asthma is sensitive to aspirin or nonsteroidal anti-inflammatory drugs (NSAIDs) (eg, ibuprofen), continue to avoid those medicines as directed by your doctor.
  • Some patients taking montelukast have developed mental or mood changes, including suicidal thoughts or actions. Contact your doctor immediately if you experience symptoms such as agitation, aggression, hostility, anxiety, depression, strange dreams, trouble sleeping, sleepwalking, tremor, hallucinations, restlessness, irritability, or any unusual change in mood or behavior. Contact your doctor immediately if any signs of suicidal thoughts or actions occur.
  • Tell your doctor or dentist that you take montelukast before you receive any medical or dental care, emergency care, or surgery.
  • PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor right away. You will need to discuss the benefits and risks of using montelukast while you are pregnant. It is not known if montelukast is found in breast milk. If you are or will be breast-feeding while you use montelukast, check with your doctor. Discuss any possible risks to your baby.

Possible side effects of montelukast:

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Cough; diarrhea; headache; indigestion; mild sore throat; mild stomach pain; nausea; runny or stuffy nose; stomach upset; tiredness.

Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing or swallowing; tightness in the chest; swelling of the mouth, face, lips, throat, or tongue; unusual hoarseness); chest pain; confusion; dark urine; ear pain; fever, chills, or persistent sore throat; flu-like symptoms; irregular heartbeat; mental or mood changes (eg, agitation, aggression, hostility, anxiety, depression, strange dreams, sleepwalking, tremor, hallucinations, restlessness, irritability); new or worsening breathing problems; numbness or tingling of the hands or feet; red, swollen, blistered, or peeling skin; seizures; severe or persistent stomach pain, with or without nausea or vomiting; sinus pain; suicidal thoughts or actions; swelling of the hands, ankles, or feet; tremor; trouble sleeping; unusual bruising or bleeding; upper respiratory infection; yellowing of the skin or eyes.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately. Symptoms may include hyperactivity; severe or persistent headache; stomach pain; unusual drowsiness or restlessness; unusual thirst; vomiting.

Proper storage of montelukast:

Store montelukast at room temperature, between 59 and 86 degrees F (15 and 30 degrees C). Store away from heat, moisture, and light. Do not store in the bathroom. Keep montelukast out of the reach of children and away from pets.

General information:

  • If you have any questions about montelukast, please talk with your doctor, pharmacist, or other health care provider.
  • Montelukast is to be used only by the patient for whom it is prescribed. Do not share it with other people.
  • If your symptoms do not improve or if they become worse, check with your doctor.
  • Check with your pharmacist about how to dispose of unused medicine.

This information should not be used to decide whether or not to take montelukast or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about montelukast. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to montelukast. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using montelukast.

Issue Date: September 3, 2014
Database Edition 14.3.1.003
Copyright © 2014 Wolters Kluwer Health, Inc.

Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.

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