Patient leaflet - Montelukast 4 mg granules in sachet
1. What Montelukast is and what it is used for
What Montelukast is
Montelukast is a leukotriene receptor antagonist that blocks substances called leukotrienes.
How Montelukast works
Leukotrienes cause narrowing and swelling of airways in the lungs. By blocking leukotrienes, Montelukast improves asthma symptoms and helps control asthma.
When Montelukast should be used
Your doctor has prescribed Montelukast to treat your child’s asthma, preventing asthma symptoms during the day and night. • Montelukast is used for the treatment of 6 months to 5 year old
patients who are not adequately controlled on their medication and need additional therapy.
Montelukast may also be used as an alternative treatment to
inhaled corticosteroids for 2 to 5 year old patients who have not recently taken oral corticosteroids for their asthma and have shown that they are unable to use inhaled corticosteroids. • Montelukast also helps prevent the narrowing of airways
triggered by exercise for patients 2 years of age and older. Your doctor will determine how Montelukast should be used depending on the symptoms and severity of your child’s asthma.
What is asthma?
Asthma is a long-term disease.
Asthma includes:
difficulty breathing because of narrowed airways. This
narrowing of airways worsens and improves in response to various conditions.
sensitive airways that react to many things, such as cigarette
smoke, pollen, cold air, or exercise.
- swelling (inflammation) in the lining of the airways. Symptoms of asthma include: Coughing, wheezing, and chest tightness.
2. What you need to know before your child takes Montelukast
Tell your doctor about any medical problems or allergies your child has now or has had.
Do not give Montelukast to your child
if he/she is allergic to montelukast or any of the other
ingredients of this medicine (listed in section 6).
Warnings and precautions
Talk to your doctor or pharmacist before you give Montelukast to your child.
If your child’s asthma or breathing gets worse, tell your doctor
immediately.
Oral Montelukast is not meant to treat acute asthma attacks. If
an attack occurs, follow the instructions your doctor has given you for your child. Always have your child’s inhaled rescue medicine for asthma attacks with you.
It is important that your child take all asthma medications
prescribed by your doctor. Montelukast should not be used instead of other asthma medications your doctor has prescribed for your child.
- If your child is on anti-asthma medicines, be aware that if he/she develops a combination of symptoms such as flu-like illness, pins and needles or numbness of arms or legs, worsening of pulmonary symptoms, and/or rash, you should consult your doctor.
- Your child should not take acetyl-salicylic acid (aspirin) or anti-inflammatory medicines (also known as non-steroidal anti-inflammatory drugs or NSAIDs) if they make his/her asthma worse.
Various neuropsychiatric events (for example behaviour and mood-related changes, depression and suicidality) have been reported in patients of all ages treated with montelukast (see section 4). There have also been reports of these symptoms continuing after treatment is stopped. If you develop such symptoms while taking montelukast or if these symptoms do not resolve after montelukast is stopped, you should contact your prescriber.
Children and adolescents
Do not give this medicine to children less than 6 months of age. There are different form(s) of this medicine available for paediatric patients under 18 years of age based on age range.
Other medicines and Montelukast
Tell your doctor or pharmacist if your child is taking or has recently been given or might be given any other medicines including those obtained without a prescription.
Some medicines may affect how Montelukast works, or Montelukast may affect how your child’s other medicines work. Tell your doctor if your child is taking the following medicines before starting Montelukast:
- phenobarbital (used for treatment of epilepsy)
- phenytoin (used for treatment of epilepsy)
- rifampicin (used to treat tuberculosis and some other infections)
Montelukast with food and drink
Montelukast granules can be taken without regard to the timing of food intake.
Pregnancy and breast-feeding
This subsection is not applicable for the Montelukast 4 mg granules since they are intended for use in children 6 months to 5 years of age.
Driving and using machines
This subsection is not applicable for the Montelukast 4 mg granules since they are intended for use in children 6 months to 5 years of age, however the following information is relevant to the active ingredient, montelukast.
Montelukast is not expected to affect your ability to drive a car or operate machinery. However, individual responses to medication may vary. Certain side effects (such as dizziness and drowsiness) that have been reported with Montelukast may affect some patients’ ability to drive or operate machinery.
Montelukast contains sodium
This medicine contains less than 1 mmol sodium (23 mg) per sachet, that is to say essentially ‘sodium-free’.
3. How to take Montelukast
Always have your child take this medicine exactly as your doctor or pharmacist has told you. Check with your child’s doctor or pharmacist if you are not sure.
This medicine is to be given to a child under adult supervision.
Your child should take Montelukast every evening. • It should be taken even when your child has no symptoms or if he/she has an acute asthma attack.
For children 6 months to 5 years of age:
The recommended dose is one sachet of Montelukast 4 mg granules to be taken by mouth each evening.
If your child is taking Montelukast, be sure that your child does not take any other products that contain the same active ingredient, montelukast.
How should I give Montelukast granules to my child?
This medicine is for oral use.
- Do not open the sachet until ready to use
Montelukast granules can be given either:
o directly in the mouth;
o OR mixed with a spoonful of cold or room temperature soft food (for example, applesauce, ice cream, carrots and rice). Package leaflet: Information for the user Montelukast 4 mg granules in sachet
Black A/s : 210 x 360 mm
Mix all of the contents of the Montelukast granules into a
spoonful of cold or room temperature soft food, taking care to see that the entire dose is mixed with the food. Be sure the child is given the entire spoonful of the granule/food mixture immediately (within 15 minutes). IMPORTANT: Never store any granule/food mixture for use at a later time.
Montelukast granules are not intended to be dissolved in liquid.
However, your child may take liquids after swallowing the Montelukast granules.
Montelukast granules can be taken without regard to the timing
of food intake.
If your child takes more Montelukast than he/she should
Contact your child’s doctor immediately for advice. There were no side effects reported in the majority of overdose reports. The most frequently occurring symptoms reported with overdose in adults and children included abdominal pain, sleepiness, thirst, headache, vomiting, and hyperactivity.
If you forget to give Montelukast to your child
Try to give Montelukast as prescribed. However, if your child misses a dose, just resume the usual schedule of one sachet once daily.
Do not give a double dose to make up for a forgotten dose.
If your child stops taking Montelukast
Montelukast can treat your child’s asthma only if he/she continues taking it.
It is important for your child to continue taking Montelukast for as long as your doctor prescribes. It will help control your child’s asthma.
If you have any further questions on the use of this medicine, ask your child’s doctor or pharmacist.
4. Possible side effects
Like all medicines, this medicine can cause side effects, although not everybody gets them.
In clinical studies with Montelukast 4 mg granules, the most commonly reported side effects (may affect up to 1 in 10 people) thought to be related to Montelukast were:
- diarrhoea
- hyperactivity
- asthma
- scaly and itchy skin
- rash
Additionally, the following side effects were reported in clinical studies with either Montelukast 10 mg film-coated tablets, Montelukast 5 mg or 4 mg chewable tablets:
- abdominal pain
- headache
- thirst
These were usually mild and occurred at a greater frequency in patients treated with Montelukast than placebo (a pill containing no medication).
Serious side effects
Talk with your doctor immediately if you notice any of the following side effects with your child, which may be serious, and for which your child may need urgent medical treatment.
Uncommon: may affect up to 1 in 100 people
allergic reactions including swelling of the face, lips, tongue,
and/or throat which may cause difficulty in breathing or swallowing
behaviour and mood related changes: agitation including
aggressive behaviour or hostility, depression
- seizure
Rare: may affect up to 1 in 1,000 people
- increased bleeding tendency
- tremor
- palpitations
Very rare: may affect up to 1 in 10,000 people
combination of symptoms such as flu-like illness, pins
and needles or numbness of arms and legs, worsening of pulmonary symptoms and/or rash (Churg-Strauss syndrome) (see section 2)
- low blood platelet count
behaviour and mood related changes: hallucinations,
disorientation, suicidal thoughts and actions
- swelling (inflammation) of the lungs
severe skin reactions (erythema multiforme) that may occur
without warning
inflammation of the liver (hepatitis)
Other side effects while the medicine has been on the market Very common: may affect more than 1 in 10 people
- upper respiratory infection
Common: may affect up to 1 in 10 people
- diarrhoea, nausea, vomiting
- rash
- fever
- elevated liver enzymes
Uncommon: may affect up to 1 in 100 people
- behaviour and mood related changes: dream abnormalities, including nightmares, trouble sleeping, sleepwalking, irritability, feeling anxious, restlessness
- dizziness, drowsiness, pins and needles/numbness
- nosebleed
- dry mouth, indigestion
- bruising, itching, hives
- joint or muscle pain, muscle cramps
- bedwetting in children
- weakness/tiredness, feeling unwell, swelling
Rare: may affect up to 1 in 1,000 people
- behaviour and mood related changes: disturbance in attention, memory impairment, uncontrolled muscle movements
Very rare: may affect up to 1 in 10,000 people
tender red lumps under the skin, most commonly on your shins
(erythema nodosum)
- behaviour and mood related changes: obsessive-compulsive symptoms, stuttering
Reporting of side effects
If your child gets any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects you can help provide more information on the safety of this medicine.
5. How to store Montelukast
- Keep this medicine out of the sight and reach of children.
- Do not use this medicine after the expiry date which is stated on the sachet after EXP. The first two numbers indicate the month; the last four numbers indicate the year. The expiry date refers to the last date of that month.
- Store in the original package in order to protect from light.
- Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.
6. Contents of the pack and other information
What Montelukast contains
- The active substance is montelukast. Each sachet of granules contains 4 mg Montelukast (as montelukast sodium).
- The other ingredients are: Mannitol, hydroxypropylcellulose, and magnesium stearate.
What Montelukast looks like and contents of the pack
Montelukast 4 mg granules in sachet are White to off-white granules.
Packs of 28 sachets.
Marketing Authorisation Holder
Milpharm Limited
1 Roundwood Avenue
Stockley Park, Uxbridge
UB11 1AF
United Kingdom
Manufacturer
APL Swift Services (Malta) Limited
HF26, Hal Far Industrial Estate, Hal Far,
Birzebbugia, BBG 3000, Malta
Or
Milpharm Limited
1 Roundwood Avenue
Stockley Park, Uxbridge
UB11 1AF
United Kingdom
This leaflet was last revised in 06/2026.
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