Singulair (Montelukast Sodium): Uses, Dosage, Price, Side Effects, Precautions & More

What is Singulair?

Singulair belongs to a group of drugs called as “leukotriene receptor antagonist” which are used predominantly to prevent and treat symptoms of asthma. An active ingredient of Singulair is Montelukast Sodium. Singulair is commonly available as tablets, chewable tablets, and oral granules.

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Uses of Singulair

Singulair (Montelukast Sodium) is most commonly used in prevention and treatment of:

  • Prophylaxis and treatment of Chronic Asthma
  • Prevention of exercise-induced bronchoconstriction
  • Seasonal allergic rhinitis
  • Perennial allergic rhinitis
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How does Singulair work?

  • Singulair contains Montelukast as its active ingredient. Montelukast is a leukotriene antagonist which reduces inflammation in the airways and nose and helps in easier breathing.
  • Singulair works by blocking leukotrienes (natural substances released during an allergic reaction and causing constriction of muscles of airway). Thus by blocking Leukotrienes, Singulair decreases the severity of asthma symptoms.

How to Take Singulair?

  • The dosage and duration of Singulair are based on your age, physical health, severity of the condition and initial response to therapy.
  • Singulair is well absorbed orally and food has no effect on its absorption thus it can be taken with or without food or as advised.
  • For ideal results, it should always be taken at a fixed time every day preferably at bedtime.
  • If you are using chewable tablets, chew the tablet completely before swallowing it.
  • In case of film coated tablets, swallow the tablet as a whole without crushing, chewing or breaking it along with plenty of fluids.
  • Continue to use this medicine regularly as this medicine works over time and is not used for sudden asthma attacks.
  • Use a quick-relief inhaler in acute asthmatic attacks. Seek medical care if no improvement is observed.

Singulair Price In India

Specifics Singulair Price
4 mg Strip of 15 Tablets Rs 100.25
5 mg Strip of 7 Tablets Rs 100.25
10 mg Strip of 15 Tablets Rs 268
Also Read: Pravastatins Price | Prilosec Price

Common Dosage for Singulair?

  • Dosage is usually determined by your physician based on your condition and age.
  • Singulair is available as a 10mg tablet, 5mg, and 4mg chewable tablet and 4mg oral granule form.
  • The recommended dose of Singulair in adult asthma patients is one 10mg tablet once daily in the evening.
  • In adult patients with exercise-induced bronchitis, one 10mg tablet 2 hours before exercise. For patients with allergic rhinitis, one 10mg Singulair tablet once daily.
  • In case of children aged 6 to 14 year, administer 5mg chewable tablet. For patients below 6 years of age, use 4mg chewable tablet.
  • In case if your condition persists or worsens after taking Singulair, discontinue the drug and inform your doctor.

When to Avoid Singulair (Montelukast Sodium)?

Singulair should be avoided or used with caution in:

  • Patients with allergy to any of its components
  • Breastfeeding and pregnancy
  • Patients with Eosinophilic conditions
  • Patients with aspirin sensitivity

Side effects of Singulair?

In addition to its intended uses, it may cause few undesirable side effects as well. List of the most commonly observed side effects include:

  • Headache
  • Agitation
  • Anxiety
  • Blurred vision
  • Difficulty in swallowing
  • Stomach pain
  • Flu-like symptoms
  • Ear pain
  • Unusual change in behaviour

In addition, it may cause some other allergic or unwanted effects. In such cases, seek medical attention immediately.

Other medicine Side Effect: Remicade Side Effect

Effect on organs?

No adverse effect observed on any organ.

Reported Allergic Reactions?

Report to your doctor if you are allergic to any of its ingredients. Signs of allergic reaction include:

  • Rashes/itching of the skin
  • Shortness of breath
  • Swelling of face, lips, tongue, or throat
  • Loss of consciousness

Drug Interactions to Be Careful About

Singulair (Montelukast Sodium) can interact with other drugs, vitamin supplements, herbal products that you are taking. This can be harmful. It is always advised that you must inform the physician about all the drugs/over the counter products/vitamin supplements used before using Singulair. All the possible drug interactions might not be listed here. Few important drug interactions are listed below:

  • Warfarin
  • Digoxin
  • Oral contraceptives
  • Prednisolone
  • Benzodiazepines
  • Aspirin
  • Sedatives

Using these medicines along with Singulair can influence the therapeutic effect of these medicines and also can increase the chances of side effects. Thus, dose alteration or drug replacement might be needed when Singulair is taken along with these drugs.

Shows Effects / Results In

  • Singulair (Montelukast Sodium) starts showing its effects within a few hours after its administration and the effect lasts up to almost 24 hours.
  • However, even if symptoms disappear, therapy with Singulair should always be continued until advised.


Is Singulair addictive?

Singulair is not addictive; however, self-medication and dependence on these medicines should be avoided.

Can I have Singulair (Montelukast Sodium) with alcohol?

Consumption of alcohol should be limited with Singulair therapy as it may increase the risk of adverse effects like dizziness, sedation and may act as a health hazard.

Any particular food item to be avoided?

No alteration in its action seen with any food product.

Can I have Singulair when pregnant?

  • Singulair should only be taken during pregnancy if the benefits outweigh the potential risks as there are no evident and well-controlled studies in pregnant females.
  • Consult your doctor if you are pregnant or plan to become pregnant for case-specific recommendations.

Can I have Singulair when feeding a baby?

  • Singulair (Montelukast Sodium) is reported to be excreted in human breast milk, therefore, it is not recommended for use while you are breastfeeding.
  • Consult your doctor for case-specific recommendations if you are breastfeeding.

Can I drive after taking Singulair?

Singulair doesn’t usually affect your ability to drive.

What happens if I overdose on Singulair (Montelukast Sodium)?

  • Overdosage has been reported with Singulair. Symptoms of overdosage include abdominal pain, thirst, headache etc.
  • If anyone is suspected of an over-dosage, seek medical care immediately.

What happens if I take expired Singulair?

  • A single dose of expired Singulair (Montelukast Sodium) may not cause any major adverse effect. However, the potency of the medicine may well have decreased over time.
  • Please inform your physician regarding the same if expired medicines have been taken chronically for a longer duration.

What happens if I miss a dose of Singulair?

Singulair (Montelukast Sodium) is usually administered once a day. In case of a missed dose, take the dose as soon as you remember it. If it is already time for next scheduled dose, do not take double the dose.

Storage Requirements of Singulair

  • Store at a cool and dry place away from direct heat and moisture.
  • Do not freeze the medicine.
  • Keep medicines away from children and pets.

Pro Tips When Taking Singulair

  • Patients on therapy with Montelukast may exhibit eosinophilia (increase in eosinophil count) in normal blood count.
  • Singulair (Montelukast Sodium) is not indicated for the treatment of acute asthma attacks. It should be used regularly to reduce the frequency of asthma attacks.
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