
Ask a doctor about a prescription for MONTELUKAST ALTER 10 mg FILM-COATED TABLETS
Package Leaflet: Information for the User
MONTELUKAST ALTER 10 mg film-coated tablets EFG
Read all of this leaflet carefully before you start taking this medicine because it contains important information for you.
Contents of the pack:
MONTELUKAST ALTER is a leukotriene receptor antagonist that blocks substances called leukotrienes. Leukotrienes cause narrowing and swelling of the airways in your lungs and can also cause allergy symptoms. By blocking leukotrienes, MONTELUKAST ALTER improves asthma symptoms, helps control asthma, and improves symptoms of seasonal allergies (also known as hay fever or allergic rhinitis).
Your doctor has prescribed MONTELUKAST ALTER to treat asthma and prevent asthma symptoms during the day and night.
Depending on your symptoms and the severity of your asthma, your doctor will determine how you should use MONTELUKAST ALTER.
What is asthma?
Asthma is a chronic disease.
Asthma includes:
The symptoms of asthma include: Coughing, wheezing, and chest congestion.
What are seasonal allergies?
Seasonal allergies (also known as hay fever or allergic rhinitis) are an allergic response often caused by airborne pollen from trees, grass, and weeds. The symptoms of seasonal allergies typically include: stuffy nose, runny nose; sneezing; itchy, watery, red, and swollen eyes.
Tell your doctor about any allergy or medical problem you have now or have had.
Do not take MONTELUKAST ALTER if you
Warnings and precautions
Consult your doctor or pharmacist before starting to take MONTELUKAST ALTER
Various neuropsychiatric events (e.g., changes related to behavior and mood, depression, and suicide) have been reported in patients of all ages treated with montelukast (see section 4). If you develop such symptoms while taking montelukast, you should contact your doctor. |
Children and adolescents
Do not give this medicine to children under 15 years of age.
For pediatric patients under 18 years of age, other presentations of this medicine are available based on the age range.
Other medicines and MONTELUKAST ALTER
Tell your doctor or pharmacist if you are taking, have recently taken, or might take any other medicines, including those obtained without a prescription.
Some medicines may affect the way MONTELUKAST ALTER works, or MONTELUKAST ALTER may affect the way other medicines work.
Before taking MONTELUKAST ALTER, tell your doctor if you are taking the following medicines:
Taking MONTELUKAST ALTER with food and drinks
MONTELUKAST ALTER 10 mg can be taken with or without 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 MONTELUKAST ALTER during this period.
Breastfeeding
It is not known whether MONTELUKAST ALTER appears in breast milk. If you are breastfeeding or plan to breastfeed, consult your doctor before taking MONTELUKAST ALTER.
Driving and using machines
MONTELUKAST ALTER 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 very rarely with MONTELUKAST ALTER may affect the patient's ability to drive or operate machinery.
MONTELUKAST ALTER contains lactose and sodium
This medicine contains lactose. If your doctor has told you that you have an intolerance to some sugars, consult them before taking this medicine.
This medicine contains less than 23 mg of sodium (1 mmol) per tablet; this is essentially "sodium-free".
Follow exactly the administration instructions of Montelukast Alter indicated by your doctor or pharmacist. In case of doubt, consult your doctor or pharmacist.
For adults and adolescents 15 years of age and older:
The recommended dose is one 10 mg tablet daily in the evening.
If you are taking MONTELUKAST ALTER, make sure you do not take any other product that contains the same active ingredient, montelukast.
This medicine is taken orally.
You can take MONTELUKAST ALTER with or without food.
If you take more MONTELUKAST ALTER than you should
If you have taken Montelukast Alter more than you should, consult your doctor or pharmacist immediately. In most cases of overdose, no adverse effects were reported. The symptoms that occurred most frequently reported in overdose in adults and children were abdominal pain, drowsiness, thirst, headache, vomiting, and hyperactivity.
Consult your doctor, pharmacist, or call the Toxicology Information Service, phone 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 forget to take MONTELUKAST ALTER
Try to take MONTELUKAST ALTER as prescribed. However, if you forget a dose, just resume your regular schedule of one tablet once a day.
Do not take a double dose to make up for forgotten doses.
If you stop taking MONTELUKAST ALTER
MONTELUKAST ALTER may only treat your asthma if you continue to take it. It is essential that you continue to take MONTELUKAST ALTER for the time your doctor prescribes it. It will help control your asthma.
If you have any further questions on the use of this product, ask your doctor or pharmacist.
Like all medicines, MONTELUKAST ALTER can cause side effects, although not everybody gets them.
In clinical trials conducted with MONTELUKAST ALTER 10 mg film-coated tablets, the side effects related to the administration of the medicine and reported most frequently (in more than 1 in 10 people) were:
These side effects were generally mild and occurred with a higher frequency in patients treated with MONTELUKAST ALTER or with placebo (a pill that does not contain medicine).
Serious side effects
Consult your doctor immediatelyif you notice any of the following side effects, which may be serious and may require urgent medical treatment.
Uncommon (may affect up to 1 in 100 people):
Rare (may affect up to 1 in 1,000 people):
Very rare (may affect up to 1 in 10,000 people):
Other side effects reported during the marketing of the medicine
Very common (may affect more than 1 in 10 people):
Common (may affect up to 1 in 10 people):
Uncommon (may affect up to 1 in 100 people):
Rare (may affect up to 1 in 1,000 people):
Very rare (may affect up to 1 in 10,000 people):
Reporting of side effects
If you 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 to the Spanish Medicines and Healthcare Products Agency (AEMPS) at https://www.notificaram.es. By reporting side effects, you can help provide more information on the safety of this medicine.
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.
Composition of MONTELUKAST ALTER
Appearance of the product and contents of the pack
Montelukast Alter 10 mg are film-coated tablets, round and white.
They are available in packs of 28 tablets.
Marketing authorization holder and manufacturer
Laboratorios ALTER, S.A.
Mateo Inurria, 30
28036 Madrid
or
Laboratorios Alter, S.A.
C/ Zeus, 6 Polígono Industrial R2
28880, Meco (Madrid)
Spain
Date of the last revision of this leaflet: March 2025
Detailed and updated information on this medicine is available on the website of the Spanish Agency for Medicines and Healthcare Products (AEMPS) http://www.aemps.gob.es
The average price of MONTELUKAST ALTER 10 mg FILM-COATED TABLETS in November, 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.
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Discuss dosage, side effects, interactions, contraindications, and prescription renewal for MONTELUKAST ALTER 10 mg FILM-COATED TABLETS – subject to medical assessment and local rules.