Montelukast is a medication that is used to treat various respiratory conditions, particularly those related to inflammation and constriction of the airways. Here are some of its uses:

  1. Asthma: Montelukast is commonly used to manage the symptoms of asthma, including wheezing, shortness of breath, and coughing. It helps to reduce inflammation in the airways, making it easier to breathe.
  2. Allergic rhinitis: This medication is also used to treat allergic rhinitis, a condition that causes nasal congestion, sneezing, and a runny nose. It can help to relieve the symptoms of allergic rhinitis by reducing inflammation in the nasal passages.
  3. Exercise-induced bronchoconstriction: Montelukast may also be used to prevent exercise-induced bronchoconstriction, which is a type of asthma that is triggered by physical activity. It can be taken before exercise to reduce the risk of symptoms.
  4. Bronchospasm associated with COPD: In some cases, montelukast may be used to manage bronchospasm associated with chronic obstructive pulmonary disease (COPD). It can help to reduce inflammation in the airways and improve breathing.

Montelukast works by blocking the action of leukotrienes, which are substances that contribute to inflammation and constriction of the airways. As a result, it can be an effective treatment for a variety of respiratory conditions. However, as with any medication, it is important to follow your doctor’s instructions and report any side effects or concerns.

Side effects of Montelukast

Like any medication, Montelukast can cause side effects. The most common side effects include:

  1. Headache
  2. Abdominal pain
  3. Nausea
  4. Diarrhea
  5. Fatigue
  6. Dizziness
  7. Insomnia
  8. Upper respiratory tract infection
  9. Rash

Serious side effects are rare, but they can occur. If you experience any of the following, you should seek medical attention immediately:

  1. Mood changes or suicidal thoughts: In rare cases, Montelukast has been associated with changes in mood or behavior, including suicidal thoughts or actions, aggression, anxiety, depression, or hallucinations.
  2. Allergic reactions: Some people may have an allergic reaction to Montelukast, which can cause symptoms such as hives, itching, difficulty breathing, and swelling of the face, lips, tongue, or throat.
  3. Liver problems: Montelukast may cause liver problems in rare cases, which can cause symptoms such as jaundice, dark urine, upper right abdominal pain, and fatigue.
  4. Skin rashes, blisters, or peeling: Some people may experience severe skin reactions, such as a rash, blisters, or peeling skin.
  5. Asthma symptoms that get worse: Although Montelukast is often used to treat asthma, in rare cases it can actually make asthma symptoms worse.

It’s important to note that these side effects are rare, and the benefits of using Montelukast generally outweigh the risks. If you have any concerns about the side effects of Montelukast, talk to your doctor.

Precautions should be taken when using Montelukast

When using Montelukast, there are a few precautions that you should take to ensure your safety and to get the most benefit from the medication. Here are some important precautions to keep in mind:

  1. Tell your doctor about any medical conditions you have: Before taking Montelukast, be sure to tell your doctor if you have any medical conditions, such as liver disease or kidney disease. Your doctor may need to adjust your dose or monitor you more closely.
  2. Inform your doctor about other medications you are taking: Montelukast may interact with other medications, including certain antibiotics, antifungal medications, and some medications used to treat HIV. Make sure your doctor knows about all the medications you are taking, including prescription drugs, over-the-counter medications, and supplements.
  3. Follow the dosing instructions carefully: Take Montelukast exactly as prescribed by your doctor. Do not take more or less of the medication than recommended, and do not take it more often than prescribed.
  4. Do not use Montelukast to treat acute asthma attacks: Montelukast is not a rescue medication and should not be used to treat acute asthma attacks. If you experience an acute asthma attack, use your rescue inhaler or seek medical attention.
  5. Keep your doctor informed of any changes in your condition: If your symptoms do not improve or get worse while taking Montelukast, contact your doctor. Your doctor may need to adjust your treatment plan.

Overall, Montelukast is considered safe and effective for most people. By following these precautions, you can help to ensure that you get the most benefit from the medication and avoid any potential complications.

Montelukast Interactions

Montelukast may interact with certain medications, which can affect how the drug works or increase the risk of side effects. It’s important to tell your doctor about all the medications you are taking, including prescription drugs, over-the-counter medications, and supplements. Here are some examples of medications that may interact with Montelukast:

  1. Aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs): Montelukast may increase the risk of bleeding when taken with aspirin or other NSAIDs, such as ibuprofen or naproxen.
  2. Rifampin: Rifampin, an antibiotic used to treat tuberculosis and other infections, may decrease the effectiveness of Montelukast.
  3. Phenobarbital and other drugs that induce liver enzymes: Montelukast is metabolized by liver enzymes, and medications that induce these enzymes may decrease the effectiveness of Montelukast.
  4. Warfarin and other blood-thinning medications: Montelukast may increase the risk of bleeding when taken with blood-thinning medications.
  5. Certain antidepressants: Montelukast may interact with some antidepressant medications, such as fluoxetine and paroxetine, which can increase the risk of side effects.

These are just a few examples of medications that may interact with Montelukast. Be sure to tell your doctor about all the medications you are taking before starting Montelukast, and let your doctor know if you experience any new or unusual symptoms while taking the medication.

Montelukast Dosage Information

The recommended dosage of Montelukast can vary depending on the condition being treated and the age of the patient. Here are some general guidelines for dosing Montelukast:

  1. For asthma: For adults and children ages 15 years and older, the recommended dose is 10 mg once daily, taken in the evening. For children ages 6 to 14 years, the recommended dose is 5 mg once daily, taken in the evening.
  2. For seasonal allergies: For adults and children ages 15 years and older, the recommended dose is 10 mg once daily, taken in the evening. For children ages 6 to 14 years, the recommended dose is 5 mg once daily, taken in the evening.
  3. For perennial allergies: For adults and children ages 15 years and older, the recommended dose is 10 mg once daily, taken in the evening. For children ages 6 to 14 years, the recommended dose is 5 mg once daily, taken in the evening.
  4. For exercise-induced bronchoconstriction: For adults and children ages 15 years and older, the recommended dose is 10 mg once daily, taken at least 2 hours before exercise. For children ages 6 to 14 years, the recommended dose is 5 mg once daily, taken at least 2 hours before exercise.
  5. For children ages 2 to 5 years: The recommended dose is 4 mg once daily, taken in the evening.

It’s important to follow your doctor’s instructions for dosing Montelukast, and to take the medication at the same time each day. Do not take more or less of the medication than prescribed, and do not stop taking the medication without first consulting with your doctor.

Montelukast Overdose

If you suspect that you or someone else has taken an overdose of Montelukast, it’s important to seek medical attention immediately. An overdose of Montelukast can cause serious side effects, including:

  1. Stomach pain
  2. Nausea and vomiting
  3. Headache
  4. Drowsiness
  5. Hyperactivity
  6. Agitation or irritability
  7. Restlessness
  8. Insomnia
  9. Tremors
  10. Seizures

In severe cases, an overdose of Montelukast can lead to a medical emergency, including a life-threatening anaphylactic reaction.

If you suspect an overdose of Montelukast, call your local emergency services right away or go to the nearest emergency room. Be sure to bring the medication container with you to the hospital, so that the healthcare provider can identify the medication and its strength. Treatment for an overdose of Montelukast may include supportive care, such as IV fluids or medications to manage symptoms, as well as close monitoring of vital signs.

How should I use Montelukast

Montelukast is usually taken by mouth, with or without food. Here are some general guidelines for using Montelukast:

  1. Take Montelukast exactly as prescribed by your doctor. Do not take more or less of the medication, and do not take it more often than prescribed.
  2. If you are taking Montelukast for asthma, take it in the evening. If you are taking it for allergies or exercise-induced bronchoconstriction, take it at any time of day.
  3. Swallow the tablet whole with a glass of water. Do not crush, chew, or break the tablet.
  4. If you are using Montelukast to prevent exercise-induced bronchoconstriction, take it at least 2 hours before exercise.
  5. Continue to take Montelukast as prescribed, even if you start to feel better. Do not stop taking the medication without first talking to your doctor.
  6. If you miss a dose of Montelukast, take it as soon as you remember. However, if it’s close to the time for your next dose, skip the missed dose and continue with your regular dosing schedule.
  7. Store Montelukast at room temperature, away from moisture and heat.

It’s important to follow your doctor’s instructions for using Montelukast, and to report any new or unusual symptoms to your doctor. If you have any questions about how to use Montelukast, talk to your doctor or pharmacist.

Common questions about Montelukast

Here are some common questions about Montelukast:

1. What is Montelukast used for?

Montelukast is used to treat asthma and symptoms of seasonal and perennial allergies.

2. How does Montelukast work?

Montelukast works by blocking certain chemicals in the body that cause inflammation and swelling in the airways and nasal passages.

3. What are the side effects of Montelukast?

Common side effects of Montelukast include headache, stomach pain, diarrhea, and nausea. Rare but serious side effects can include behavioral changes, allergic reactions, and liver problems.

4. How should I take Montelukast?

Montelukast is usually taken by mouth, with or without food. It’s important to follow your doctor’s instructions for dosing and to take the medication at the same time each day.

5. Can Montelukast be used for children?

Yes, Montelukast can be used in children as young as 2 years old for asthma and as young as 6 months old for allergies.

6. Is Montelukast addictive?

No, Montelukast is not addictive and does not cause dependence.

7. Can Montelukast be taken with other medications?

Montelukast can interact with some medications, so it’s important to tell your doctor or pharmacist about all medications, vitamins, and supplements you are taking before starting Montelukast.

Brand names montelukast 

Montelukast is available under several brand names, including:

  • Singulair
  • Lukast
  • Montair
  • Romilast
  • Montecip
  • Monteflo
  • Montril
  • Ventair

These brand names may vary depending on the country and manufacturer. It’s important to use the brand and formulation of Montelukast that has been prescribed by your doctor and to follow the specific dosing instructions for that medication.

The Bottom Line

Montelukast is a medication that is used to treat asthma and symptoms of seasonal and perennial allergies. It works by blocking certain chemicals in the body that cause inflammation and swelling in the airways and nasal passages. Montelukast is generally well-tolerated, but common side effects can include headache, stomach pain, diarrhea, and nausea. Rare but serious side effects can include behavioral changes, allergic reactions, and liver problems. It’s important to follow your doctor’s instructions for dosing and to take the medication at the same time each day. If you have any questions about Montelukast, talk to your doctor or pharmacist.

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Last Update: March 8, 2023