Before taking Montelukast 5mg, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using Montelukast 5mg, tell your doctor or pharmacist your medical history, especially of: liver disease.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
The chewable tablets may contain aspartame. If you have phenylketonuria (PKU) or any other condition that requires you to limit/avoid aspartame (or phenylalanine) in your diet, ask your doctor or pharmacist about using Montelukast 5mg safely.
During pregnancy, Montelukast 5mg should be used only when clearly needed. Discuss the risks and benefits with your doctor.
It is unknown if Montelukast 5mg passes into breast milk. Consult your doctor before breast-feeding.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.
Montelukast 5mg is used regularly to prevent the wheezing and shortness of breath caused by asthma and decrease the number of asthma attacks. Montelukast 5mg is also used before exercise to prevent breathing problems during exercise (bronchospasm). Montelukast 5mg can help decrease the number of times you need to use your rescue inhaler. Montelukast 5mg is also used to relieve symptoms of hay fever and allergic rhinitis (such as sneezing, stuffy/runny/itchy nose).
Montelukast 5mg does not work immediately and should not be used to treat sudden asthma attacks or other breathing problems.
Montelukast 5mg works by blocking certain natural substances (leukotrienes) that may cause or worsen asthma and allergies. It helps make breathing easier by reducing swelling (inflammation) in the airways.
Read the Patient Information Leaflet if available from your pharmacist before you start taking Montelukast 5mg and each time you get a refill. If you have any questions, ask your doctor or pharmacist.
Take Montelukast 5mg by mouth with or without food as directed by your doctor. The dosage is based on your medical condition and response to treatment. If you are using the chewable tablets, chew them thoroughly before swallowing. If your child cannot safely chew and swallow them, consult the doctor or pharmacist for advice.
Take Montelukast 5mg at the same time each day. If you are taking Montelukast 5mg for asthma or for both asthma and allergies, take your dose in the evening. If you are taking Montelukast 5mg to prevent only allergies, take your dose either in the morning or the evening.
If you are taking Montelukast 5mg to prevent breathing problems during exercise, take your dose at least 2 hours before exercise. Do not take more than one dose in 24 hours. Do not take a dose before exercise if you are already taking Montelukast 5mg daily for asthma or allergies. Doing so may increase the risk of side effects.
Do not increase or decrease your dose or stop using Montelukast 5mg without consulting your doctor. Continue to use Montelukast 5mg regularly to keep your asthma under control, even during sudden asthma attacks or periods when you have no asthma symptoms. Continue to also take other medications for asthma as directed by your doctor. Montelukast 5mg works over time and is not meant to relieve sudden attacks of asthma. Therefore, if an asthma attack or other breathing problem occurs, use your quick-relief inhaler as prescribed. You should always have a quick-relief inhaler with you. Consult your doctor or pharmacist for more details.
Get medical help right away if your asthma symptoms worsen and your quick-relief inhaler is not helping. Tell your doctor promptly if asthma symptoms, breathing problems, allergy symptoms, number of times you use your rescue inhaler persist or worsen.
Remember that your doctor has prescribed Montelukast 5mg because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using Montelukast 5mg do not have serious side effects.
Tell your doctor immediately if any of these rare but serious side effects occur: mental/mood changes (such as agitation, aggression, anxiety, trouble sleeping, abnormal dreams, sleep-walking, depression, hallucinations, thoughts of harming yourself/suicide), numbness/tingling/shooting pain in the arms or legs, muscle weakness.
A very serious allergic reaction to Montelukast 5mg is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Click here to view a more detailed list of Montelukast side effects.
If you miss a dose of Montelukast 5mg, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up. Do not take more than 1 dose in 24 hours.
The effects of some drugs can change if you take other drugs or herbal products at the same time. This can increase your risk for serious side effects or may cause your medications not to work correctly. These drug interactions are possible, but do not always occur. Your doctor or pharmacist can often prevent or manage interactions by changing how you use your medications or by close monitoring.
To help your doctor and pharmacist give you the best care, be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products) before starting treatment with this product. While using this product, do not start, stop, or change the dosage of any other medicines you are using without your doctor's approval.
Some medications can affect the removal of Montelukast 5mg from your body, which may affect how Montelukast 5mg works. Examples include phenobarbital and rifampin, among others.
This document does not contain all possible drug interactions. Keep a list of all the products you use. Share this list with your doctor and pharmacist to lessen your risk for serious medication problems.