Montelukast is a leukotriene receptor antagonist. Doctors use it to prevent asthma attacks and to treat allergies such as hay fever. It is a controller medicine, so it does not stop a sudden attack.
What Is Montelukast Used For?
- Long-term control of asthma
- Allergic rhinitis (hay fever)
- Preventing breathing problems during exercise
How Does Montelukast Work?
Leukotrienes are chemicals that tighten the airways and cause swelling and mucus. Montelukast blocks them, so the airways stay open and allergy symptoms ease.
General Dosage Information
This is general information only. Your doctor sets the right dose for you, so follow your prescription and the label.
- Adults and children aged 15 and over usually take 10 mg once a day in the evening.
- Children aged 6 to 14 usually take a 5 mg chewable tablet, and children aged 2 to 5 take a 4 mg chewable tablet or granules.
- Take it every day, even when you feel well.
Side Effects of Montelukast
Common Side Effects
- Headache
- Stomach pain
- Cough or sore throat
- Tiredness
Serious Side Effects
Call your doctor or get emergency help if you notice:
- Mood or behavior changes, such as agitation, bad dreams, depression, or thoughts of self-harm. Contact your doctor right away.
- Swelling of the face or throat
- Fever with tingling or numbness, which can signal a rare condition
Who Should Be Cautious?
- People with a history of depression or other mental health conditions
- People with liver disease
- Pregnant or breastfeeding women should ask their doctor
- Parents of children who take it, who should watch for changes in mood and behavior
Drug Interactions
Tell your doctor and pharmacist about every medicine and supplement you take. Examples of important interactions include:
- Phenobarbital and rifampin: they can lower montelukast levels.
- Gemfibrozil: it can raise montelukast levels.
- Other asthma medicines: keep taking them unless your doctor says otherwise.
Storage and Precautions
- Store it at room temperature, away from heat, light, and moisture.
- Keep it out of the reach of children.
Frequently Asked Questions
Can montelukast stop an asthma attack?
No. Use your quick-relief inhaler for an attack.
When should I take it?
Take it in the evening, at the same time each day.
Are there mood warnings?
Yes. Stop it and call your doctor if you notice unusual mood changes.
Disclaimer: This article is for information only. It is not medical advice. Please talk to your doctor about your own health.