Medication Information Leaflet
Montelukast prevents swelling of the airways and is used to prevent and treat asthma and allergic rhinitis. It can also be used for other conditions as determined by your doctor.
Take exactly as how your healthcare professional has told you.
Do not stop taking your medication without checking with your healthcare professional.
You may take this medication with or without food.
If you are taking Montelukast granules, it can be mixed with a spoonful of cold or room temperature soft food, such as ice cream, rice or steamed carrots. The medication must be taken within 10 to 15 minutes after the medication packet is opened. You should not dissolve the granules in water, but you can drink water to help swallow down the granules.
If you are taking the Montelukast chewable tablets, chew well before swallowing.
If you forget to take a dose, take it as soon as you remember. Then take your next dose at the usual time. Do not take two doses to make up for the missed dose.
Inform your healthcare professional if:
You are allergic to this medication or any of the other ingredients of this medication.
You are pregnant, planning to become pregnant, or breastfeeding.
You are taking any other medications, including supplements, traditional medications and herbal remedies.
The side effects for Montelukast are usually mild and generally well tolerated. They include the following:
Infection of the airways
Stomach pain, diarrhoea, nausea
Numbness in hands and feet
These symptoms may happen but should get better over time. Check with your doctor if any of these symptoms are serious or do not go away.
In some cases, this medication may be associated with the following changes to a person’s mental condition, especially in the first few weeks of treatment.
Mood or behaviour changes
Worsening agitation, restlessness or, violent behaviour
New or worsening thoughts of harming yourself or ending your life
Please inform your doctor as soon as possible if you experience the above symptoms, or for your family or caregiver to inform your doctor if you are unable to seek treatment on your own.
Patients and parents/caregivers should stop Montelukast and discuss with their healthcare professional right away if you or your child experience behaviour or mood-related changes while taking the medication.
It is important to note that your doctor has prescribed this medication as he/she feels you will benefit more from taking this medication over the possible risks that it may cause. The risks of having these adverse effects are low. Most people take this medication without any of such problems.
The symptoms of a drug allergy include one or more of the following:
Difficulty in breathing
Itchy skin rashes over your whole body
If you experience any of these symptoms, you should stop your medication and see your healthcare professional immediately.
Store in a cool and dry place, away from direct sunlight. Keep this medication away from children.
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This article was last reviewed on
Wednesday, November 22, 2023
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