SINGULAIR 5 mg CHEWABLE TABLETS
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How to use SINGULAIR 5 mg CHEWABLE TABLETS
Introduction
Package Leaflet: Information for the User
Singulair 5mg Chewable Tablets
montelukast
Read all of this leaflet carefully before you or your child start taking this medicine because it contains important information for you or your child.
- Keep this leaflet, you may need to read it again.
- If you have any further questions, ask your doctor or pharmacist.
- This medicine has been prescribed for you or your child only. Do not pass it on to others. It may harm them, even if their signs of illness are the same as yours or your child's.
- If you or your child get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. See section 4.
Contents of the pack
- What is Singulair and what is it used for
- What you need to know before you take Singulair
- How to take Singulair
- Possible side effects
- Storage of Singulair
- Contents of the pack and other information
1. What is Singulair and what is it used for
What is Singulair
Singulair is a leukotriene receptor antagonist that blocks substances called leukotrienes.
How Singulair works
Leukotrienes cause narrowing and swelling of the airways in the lungs. By blocking leukotrienes, Singulair improves asthma symptoms and helps control asthma.
When to use Singulair
Your doctor has prescribed Singulair to treat asthma and prevent asthma symptoms during the day and night.
- Singulair is used to treat pediatric patients from 6 to 14 years of age who are not adequately controlled with their medication and need additional treatment.
- Singulair is also used as an alternative treatment to inhaled corticosteroids in patients from 6 to 14 years of age who have not recently taken oral corticosteroids for the treatment of their asthma and have demonstrated that they are unable to use inhaled corticosteroids.
- Singulair also helps prevent exercise-induced narrowing of the airways.
Depending on the symptoms and severity of your asthma or your child's asthma, your doctor will determine how you should use Singulair.
What is asthma?
Asthma is a chronic disease.
Asthma includes:
- difficulty breathing due to narrowing of the airways. This narrowing of the airways worsens and improves in response to various diseases.
- airways that are sensitive to many things, such as cigarette smoke, pollen, cold air, or exercise.
- swelling (inflammation) of the inner layer of the airways.
Asthma symptoms include: Cough, wheezing, and chest congestion.
2. What you need to know before you take Singulair
Tell your doctor about any allergy or medical problem that you or your child have now or have had.
Do not take Singulair
- if you or your child are allergic to montelukast or any of the other ingredients of this medicine (listed in section 6).
Warnings and precautions
Consult your doctor or pharmacist before you or your child start taking Singulair.
- If your asthma or breathing or your child's asthma or breathing worsen, tell your doctor immediately.
- Singulair oral is not indicated for the treatment of acute asthma attacks. If an attack occurs, follow the instructions given by your doctor for you or your child. Always have your rescue inhaler medication for asthma attacks.
- It is essential that you or your child use all asthma medications prescribed by your doctor. Singulair should not be used instead of other asthma medications that your doctor has prescribed for you or your child.
- Any patient being treated with asthma medications should be aware that if they develop a combination of symptoms such as flu-like illness, tingling or numbness of arms or legs, worsening of lung symptoms, and/or skin rash, they should consult their doctor.
- You or your child should not take acetylsalicylic acid (aspirin) or anti-inflammatory medications (also known as non-steroidal anti-inflammatory medications or NSAIDs) if they worsen your asthma.
Neuropsychiatric events
Consult your doctor immediatelyif you or your child develop any of the following symptoms: changes in behavior and mood, depression, and suicidal tendencies (see section 4).
Children and adolescents
Do not give this medicine to children under 6 years of age.
For pediatric patients under 18 years of age, other formulations of this medicine are available based on the age range.
Other medicines and Singulair
Tell your doctor or pharmacist if you or your child are taking, have recently taken, or might take any other medicines, including those obtained without a prescription.
Some medicines may affect the way Singulair works, or Singulair may affect the way other medicines work.
Before taking Singulair, tell your doctor if you or your child are taking the following medicines:
- phenobarbital (used to treat epilepsy)
- phenytoin (used to treat epilepsy)
- rifampicin (used to treat tuberculosis and some other infections)
Taking Singulair with food and drinks
Singulair 5 mg chewable tablets should not be taken with food; they should be taken at least 1 hour before or 2 hours after food.
Pregnancy and breastfeeding
If you are pregnant or breastfeeding, think you may be pregnant, or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine.
Pregnancy
Your doctor will assess whether you can take Singulair during this period.
Breastfeeding
It is not known whether Singulair appears in breast milk. If you are breastfeeding or plan to breastfeed, consult your doctor before taking Singulair.
Driving and using machines
Singulair is not expected to affect your ability to drive a car or operate machinery. However, individual responses to the medicine may vary. Certain side effects (such as dizziness and drowsiness) that have been reported with Singulair may affect the patient's ability to drive or operate machinery.
Singulair 5mg chewable tablets contain aspartame, sodium, and benzyl alcohol
This medicine contains 1.5 mg of aspartame in each 5 mg chewable tablet, equivalent to 0.842 mg of phenylalanine. Aspartame contains a source of phenylalanine that may be harmful if you or your child have phenylketonuria (PKU), a rare genetic disorder in which phenylalanine accumulates because the body cannot eliminate it properly.
This medicine contains less than 23 mg of sodium (1 mmol) per tablet; this is essentially "sodium-free".
This medicine contains up to 0.45 mg of benzyl alcohol in each tablet. Benzyl alcohol may cause allergic reactions.
Consult your doctor or pharmacist if you are pregnant or breastfeeding. This is because large amounts of benzyl alcohol can accumulate in your body and cause side effects (metabolic acidosis).
Consult your doctor or pharmacist if you or your child have liver or kidney disease. This is because large amounts of benzyl alcohol can accumulate in the body and cause side effects (metabolic acidosis).
3. How to take Singulair
Follow exactly the instructions of administration of this medicine given by your doctor or pharmacist. If you are in doubt, consult your doctor or pharmacist again.
- You or your child should only take one Singulair chewable tablet once a day, as prescribed by your doctor.
- It should be taken even when you or your child do not have symptoms or when you or your child have an acute asthma attack.
For children from 6 to 14years of age:
The recommended dose is one 5 mg chewable tablet daily in the evening.
If you or your child are taking Singulair, make sure that neither you nor your child take any other product containing the same active ingredient, montelukast.
This medicine is taken orally.
The tablets should be chewed before swallowing.
Singulair 5 mg chewable tablets should not be taken with food; they should be taken at least 1 hour before or 2 hours after food.
If you or your child take more Singulair than you should
Seek immediate medical attention from your doctor.
In most cases of overdose, no adverse effects were reported. The symptoms that occurred most frequently in overdose in adults and children were abdominal pain, drowsiness, thirst, headache, vomiting, and hyperactivity.
Immediately consult your doctor, pharmacist, or call the Toxicology Information Service, telephone 91.562.04.20, indicating the medicine and the amount taken. It is recommended to take the packaging and the leaflet of the medicine to the healthcare professional.
If you or your child forget to take Singulair
Try to take Singulair as prescribed. However, if you or your child forget a dose, just resume your usual routine of one chewable tablet once a day.
Do not take a double dose to make up for forgotten doses.
If you or your child stop taking Singulair
Singulair can only treat your asthma or your child's asthma if you or your child continue to take it. It is essential that you continue to take Singulair for as long as your doctor prescribes it. It will help control your asthma or your child's asthma.
If you have any further questions about the use of this medicine, ask your doctor or pharmacist.
4. Possible side effects
Like all medicines, this medicine can cause side effects, although not everybody gets them.
In clinical trials with Singulair 5 mg chewable tablets, the side effects related to the administration of the medicine and reported most frequently (may affect up to 1 in 10 people) were:
- headache
Additionally, the following side effects were reported in clinical trials with Singulair 10 mg film-coated tablets:
- abdominal pain
These side effects were generally mild and occurred with a higher frequency in patients treated with Singulair than with placebo (a pill that does not contain medicine).
Serious side effects
Consult your doctor immediatelyif you or your child experience any of the following side effects, which may be serious and require urgent medical attention.
Uncommon (may affect up to 1 in 100 people):
- allergic reactions including swelling of the face, lips, tongue, and/or throat that can cause difficulty breathing or swallowing
- behavior and mood changes: excitement including aggressive or hostile behavior, depression
- seizures
Rare (may affect up to 1 in 1,000 people):
- increased risk of bleeding
- tremor
- palpitations
Very rare (may affect up to 1 in 10,000 people):
- combination of symptoms such as flu-like illness, tingling or numbness of arms and legs, worsening of lung symptoms, and/or skin rash (Churg-Strauss syndrome) (see section 2)
- low platelet count
- behavior and mood changes: hallucinations, disorientation, suicidal thoughts and actions
- inflammation (inflammation) of the lungs
- severe skin reactions (erythema multiforme) that can occur without warning
- inflammation of the liver (hepatitis)
Other side effects reported during the marketing of the medicine
Very common (may affect more than 1 in 10 people):
- upper respiratory infection
Common (may affect up to 1 in 10 people):
- diarrhea, nausea, vomiting
- skin rash
- fever
- elevated liver enzymes
Uncommon (may affect up to 1 in 100 people):
- behavior and mood changes: sleep disturbances, including nightmares, sleep problems, sleepwalking, irritability, feeling anxious, restlessness
- dizziness, drowsiness, tingling/numbness
- nosebleeds
- dry mouth, indigestion
- bruises, itching, hives
- joint or muscle pain, muscle cramps
- bedwetting (in children)
- weakness/tiredness, malaise, swelling
Rare (may affect up to 1 in 1,000 people):
- behavior and mood changes: attention disturbance, memory disturbance, uncontrolled muscle movements
Very rare (may affect up to 1 in 10,000 people):
- painful red lumps under the skin that most frequently appear on the shins (erythema nodosum)
- behavior and mood changes: obsessive-compulsive symptoms, stuttering
Reporting of side effects:
If you or your child experience any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly through the Spanish Medicines Surveillance System for Human Use: https://www.notificaram.es. By reporting side effects, you can help provide more information on the safety of this medicine.
5. Storage of Singulair
- 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 blister after EXP. The first two numbers indicate the month; the last four numbers indicate the year. The expiry date is the last day of the month indicated.
- Store in the original package to protect from light and moisture.
- Medicines should not be disposed of via wastewater or household waste. Ask your pharmacist how to dispose of medicines no longer required. These measures will help protect the environment.
6. Contents of the pack and other information
Composition of Singulair
- The active substance is montelukast. Each chewable tablet contains montelukast sodium equivalent to 5 mg of montelukast.
- The other ingredients are:
mannitol (E-421), microcrystalline cellulose, hypromellose (E-463), red iron oxide (E-172), sodium croscarmellose, cherry flavor that contains benzyl alcohol (E-1519), aspartame (E-951), and magnesium stearate.
Appearance of the product and contents of the pack
Singulair 5 mg chewable tablets are pink, round, biconvex, with SINGULAIR engraved on one side and MSD 275 on the other.
Blister packs in packs of: 7, 10, 14, 20, 28, 30, 50, 56, 84, 90, 98, 100, 140, and 200 tablets.
Blister packs (unit dose) in packs of: 49x1, 50x1, and 56x1 tablets.
Not all pack sizes may be marketed.
Marketing authorization holder and manufacturer
Marketing authorization holder
Organon Health, S.L.
Paseo de la Castellana, 77
28046 Madrid
Spain
Tel.: 915911279
Manufacturer
Merck Sharp & Dohme, B.V.
Waarderweg 39
2031 BN Haarlem
Netherlands
or
Organon Heist bv
Industriepark 30
2220 Heist-op-den-Berg
Belgium
This medicine is authorized in the Member States of the European Economic Area under the following names:
Austria, Belgium, Denmark, Finland, France, Greece, Spain, Sweden, Germany, Ireland, Italy, Luxembourg, Netherlands, Portugal
Singulair
Date of last revision of this leaflet:04/2023.
Detailed and updated information on this medicine is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS) http://www.aemps.gob.es/
How much does SINGULAIR 5 mg CHEWABLE TABLETS cost in Spain ( 2025)?
The average price of SINGULAIR 5 mg CHEWABLE TABLETS in December, 2025 is around 21.06 EUR. Prices may vary depending on the region, pharmacy, and whether a prescription is required. Always check with a local pharmacy or online source for the most accurate information.
- Country of registration
- Average pharmacy price21.06 EUR
- Active substance
- Prescription requiredYes
- Manufacturer
- This information is for reference only and does not constitute medical advice. Always consult a licensed doctor before taking any medication. Oladoctor is not responsible for medical decisions based on this content.
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