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Drug Class: Commonly Known As: Category:
Antiasthma Adult, Children

Montelukast - What is it for

Montelukast is used for treatment of asthma and allergic rhinitis.

Montelukast - Side Effects, Precautions, and Contraindications

What side effects can Montelukast cause?

Montelukast has generally been well tolerated. Side effects are usually mild and in most instances, do not require the discontinuation of therapy. Possible side effects include:

  •  Sore throat, cough and cold
  •  Headache, dizziness
  •  Stomach discomfort, throwing up

Inform your doctor or pharmacist if you experience the above side effects.

If you show any significant change in mood / behavior, or signs or symptoms of allergic reactions (swollen eyes, shortness of breath or rashes), stop medication and seek medical attention.

Before taking Montelukast, what precautions must I follow?

What food or medicine must I avoid when I take Montelukast?

Montelukast - Dosage and How to Use

How should Montelukast be used?

Montelukast should be taken once daily as directed by the doctor. The medication should be continued even if asthma is under control and only stopped on instructions by your doctor. It should also be continued during periods of worsening asthma.

If taking:

4mg Oral Granules

  • The granules should be consumed within 15 minutes of opening the sachet.
  • The medication can be mixed with a spoonful of the following room temperature food: apple sauce, mashed carrots, breast milk, porridge, rice, milk.
  • Alternatively, the medication can be fed directly into the child's mouth.
  • Your child may drink other room temperature liquids after swallowing the granules.
  • If the recommended method of administration above is not possible, you may mix the granules with room temperature water in a spoon and get the child to swallow the mixture immediately.
  • The granules will NOT dissolve in the liquids above. Do not attempt to dissolve or crush the granules.


5mg Chewable Tablets

  • Chew well before swallowing.
Dosage instructions for 5mg chewable Montelukast tablets

10mg Oral Tablets

  • Swallow whole with a glass of water, juice or milk. Do not crush, cut or dissolve the tablets.
  • It can be taken with or without food.
Dosage instructions for 10mg Montelukast oral tablets

What should I do if I miss a dose?

Administer the missed dose as soon as you remember it. If you remember a missed dose at the time of the next dose, omit the missed dose and take only the regularly scheduled dose. Do not take a double dose to make up for the missed one.

What should I do if I overdose?

Montelukast - Handling and Storage

How should I handle Montelukast safely?

How should I store Montelukast?

Keep away from children;#Keep in a cool, dry place, away from direct sunlight;#Store at room temperature;#

How should I dispose of Montelukast safely?

Montelukast - Additional Information

Montelukast may take up to a few weeks before its full effect is seen. Continue to take montelukast during this time together with the other asthma medicines according to the doctor's instructions.

Montelukast has not been shown to be effective for the treatment of asthma attacks. Therefore, an appropriate rescue medication (e.g. salbutamol inhaler) should be readily available.

Do not take Montelukast if you had a previous allergic reaction to it.

  • Updated on Monday, January 21, 2019
  • This article is contributed by Department of Pharmacy KK Women's and Children's Hospital

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