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Having a visit does not guarantee a medication will be ordered or refilled. It is clinicians’ professional decision. It is prohibited by law to prescribe or refill controlled substances via virtual visits. Your provider may recommend follow-up care, including additional services that may not be included in visit price.

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Montelukast (Generic Singulair)

What Is Montelukast?

Montelukast is a drug that predominantly treats asthma and helps to reduce asthmatic symptoms and prevent asthma attacks from occurring. It is sometimes referred to as Montelukast Sodium and will be available for prescription in oral tablet or chewable tablet forms.

This medication is sold under the brand name Singulair and is classified as a leukotriene receptor antagonist (LTRA) or an antileukotriene.

How Does Montelukast Work?

Montelukast works to calm the symptoms of asthma and some severe allergic reactions by reducing inflammation. Effectively, it prevents the narrowing of your airways, enabling you to breathe easier while reducing the chances of asthma attacks happening.

Members of the LTRA family work by blocking substances in the body called leukotrienes. These substances cause inflammation and swelling in the airways, reducing your ability to breathe. When they are blocked, the body returns to a more normal state, and inflammation is greatly reduced.

It is crucial to note that Montelukast is not a fast-acting emergency response drug. It will typically work when taken regularly, gradually reducing inflammation over time. If you suffer from asthma, you will still need to use an asthma pump for quick relief.

What Is Montelukast Used For?

As mentioned, Montelukast is first used to treat the common symptoms of asthma in children and adults. This medication has been proven to help reduce the following issues in asthmatic patients:

  • Wheezing
  • Breathing issues
  • Tightness in the chest
  • Excessive coughing

Due to the way it works, Montelukast can also be used for other conditions related to the airways and breathing difficulties. Conditions such as bronchospasm and exercise-induced asthma can also be treated with this medication.

In addition to this, it is not unheard of for Montelukast to be used as a treatment for allergies. It can be used for allergic rhinitis symptoms in both children and adults, particularly if these symptoms cause breathing difficulties.

However, it will only be used to treat allergic rhinitis if more mainstream methods have not helped – such as antihistamines or steroid nasal sprays.

What Are the Side Effects of Montelukast?

Montelukast is a prescription drug, meaning it can exhibit some side effects in certain individuals. There is no guarantee that side effects will be present, so keep an eye on your body to see if any of the following common side effects are seen:

  • Mild stomach pain/irritation
  • Diarrhea
  • Mild pain in the ear or a build-up of pressure
  • Headache
  • Mild cold symptoms

It is common to see any of these side effects and they are all on the mild side. You shouldn’t worry about them because they will clear up within a few days or a week. The time to be concerned will be when these side effects do not go away or get even worse. If this happens, contact your doctor immediately.

Similarly, you should seek immediate medical attention if these symptoms are present:

  • Severe anxiety
  • Bouts of depression
  • Loss of memory
  • Excessive body tremors
  • Suicidal thoughts
  • Vivid and frequent hallucinations
  • A severe rash/hives
  • Swelling of the face

Most people do not experience these side effects, and they are incredibly rare and severe. Do not waste time if you start suffering from any of the severe side effects – stop taking Montelukast and consult with a medical professional.

How to Take Montelukast?

Montelukast can be taken as an oral tablet that’s swallowed daily, or as a chewable tablet that can be taken with meals.

Dosages and frequency will vary from patient to patient as it is based on the severity of your condition. As an example, individuals with mild asthma will take a lower dose on a lower frequency than those with severe asthma.

Never take more than one dose of this medication within 24 hours. If you miss your dose for whatever reason, skip it and continue with your next dose the following day. It is not advised to purposely skip doses as Montelukast works best when taken regularly to help gradually reduce inflammation in the airways over time.

Furthermore, you will take Montelukast alongside your asthma inhaler and other asthma medication. Do not use it as the only treatment for asthma, particularly if you are prone to asthma attacks. Keep your inhaler with you at all times and do not rely on Montelukast as an instant-relief treatment – use your inhaler instead.

Always read through the instruction pamphlet and consult with a doctor before taking Montelukast. This will help you know if any other medications you take interact with this drug, or what you should avoid doing while on this medication. If your symptoms persist or get significantly worse, talk to your doctor about either upping the dose or trying a different treatment option.

Frequently Asked Questions About Montelukast

Who Should Not Take Montelukast?

You shouldn’t take Montelukast if:

  • You are allergic to Montelukast or any of its ingredients
  • If you have a history of mental health issues or neuropsychiatric events
  • If you have kidney or liver problems
  • You have a history of liver problems.
  • If you have phenylketonuria (PKU).

The list above is not exhaustive. Make sure to talk to your doctor before taking Montelukast. They can provide guidance tailored to your specific situation and help assess the risks and benefits

What Are the Most Common Side Effects of Montelukast?

Montelukast (Singulair) is generally well-tolerated and the side effects are generally mild. But, just like with any other medication, it can cause some side effects. The most common side effect of Montelukast include:

  • Upper respiratory infection
  • Fever
  • Headache
  • Sore throat
  • Cough
  • Stomach pain
  • Diarrhea
  • Earache or ear infection
  • Runny or stuffy nose
  • Sinus infection

It is important to note that Montelukast has been associated with an increase in suicidal thoughts and behavior, so it’s important to be aware of this potential risk.

These are just some of the common side effects of taking Montelukast. If you experience any of these side effects or any others that concern you, make sure to talk to your doctor right away.

What to Avoid While Taking Montelukast?

When taking Montelukast, there are some things you should avoid. These include:

  • Avoid drinking alcohol – Consuming alcohol while taking montelukast might increase the risk of liver problems, especially if taken in excess.
  • Aspirin – Some people with asthma can experience exacerbated symptoms when they take aspirin or other NSAIDs.
  • Other medication – Always inform your healthcare provider of any other medications, supplements, or herbal products you’re taking to ensure there are no interactions.

The list is not exhaustive. Make sure to talk to your doctor before taking Montelukast, so they can provide guidance tailored to your specific situation and help assess the risks and benefits.

How Long Does It Take for Montelukast to Work?

In general, it takes about two hours for oral Singulair to start producing results. It can take up to a week for the full effects of Montelukast to be felt. Keep in mind that results and dosage may vary depending on individual factors and the condition being treated.

Can You Buy Montelukast Over-The-Counter (OTC)?

No, Montelukast (Singulair) is a prescription medication and as such cannot be purchased over-the-counter. You can only get it through a licensed healthcare provider.

Can I Get a Refill for Montelukast From DrHouse?

Yes, you can get a refill for Montelukast from DrHouse if deemed appropriate by one of our physicians based on your medical history and current condition.

For more detailed information about montelukast, you can refer to the following sources:


The content on this page has been medically reviewed for accuracy and comprehensiveness by Amy Dougherty, FNP-BC, AGAC 

Content on the DrHouse website is written by our medical content team and reviewed by qualified MDs, PhDs, NPs, and PharmDs. We follow strict content creation guidelines to ensure accurate medical information. However, this content is for informational purposes only and not a substitute for professional medical advice, diagnosis, or treatment. For more information read our medical disclaimer.

Always consult with your physician or other qualified health providers about medical concerns. Never disregard professional medical advice or delay seeking it based on what you read on this website.

If you are experiencing high fever (>103F/39.4C), shortness of breath, difficulty breathing, chest pain, heart palpitations, abnormal bruising, abnormal bleeding, extreme fatigue, dizziness, new weakness or paralysis, difficulty with speech, confusion, extreme pain in any body part, or inability to remain hydrated or keep down fluids or feel you may have any other life-threatening condition, please go to the emergency department or call 911 immediately.

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Frequently asked questions

  • Yes, you can get a new prescription or refill an existing one online through DrHouse. You just need to start a consultation with one of our licensed providers and they will be able to assess your needs and provide you with a prescription if necessary.

    Please note that the final decision always rests with the doctor based on their professional judgment and your health needs.

  • There are certain medications that cannot be prescribed online by DrHouse physicians due to safety reasons. These include controlled substances, such as opioids and other narcotics, as well as drugs with a high potential for abuse or dependence. DrHouse physicians also don’t prescribe Gabapentin, medical marijuana, muscle relaxants, and HRT medications.

  • With DrHouse getting a new prescription or a refill for your current Rx is a straightforward and quick process. All you need to do is follow a few easy steps:

    • Download the DrHouse telehealth app on your mobile device.
    • Create an account by providing basic information and medical history.
    • Start an on-demand virtual video consultation with one of our licensed physicians.
    • Discuss your medical needs and concerns with one of our physicians.
    • A doctor will review your medical history, symptoms, and current medications (if any) to determine if an online prescription is appropriate for you.
    • If a physician approves, they will electronically send a new prescription or refill request to the pharmacy of your choice.
    • Pick up your medication from the pharmacy.

    DrHouse makes it easy for you to get an online prescription from the comfort of your own home. No more waiting in line at the doctor’s office or pharmacy, and no need to take time off work to see a doctor. Our telehealth platform allows you to access quality medical care from anywhere with an internet connection.

    For more information about how our telehealth platform works visit our “How DrHouse Works” page.

  • During your virtual consultation with a DrHouse physician, you will have the opportunity to discuss your medical needs and concerns.

    The consultation will consist of a video call where a physician will assess your medical history and ask you questions about your symptoms and any other relevant information. This is to ensure that a physician has all the necessary information to make an informed decision about your prescription.

    You can also ask any questions or clarify any doubts you may have about your condition or medication. Our physicians are happy to address any concerns you may have.

    Once a physician has assessed your needs, they will determine if and what type of prescription is appropriate for you. If a new prescription or refill is approved, a doctor will send it electronically to your chosen pharmacy.

  • With our on-demand telehealth service, you have the opportunity to see the first available doctor in as little as 10 to 15 minutes. However, the exact consult time will depend on the complexity of your case and the thoroughness required by the healthcare provider to make an informed decision.

  • Absolutely, it is safe to get an online prescription from DrHouse. We are committed to ensuring the highest standards of patient safety and privacy.

    All our providers are highly qualified US-based physicians and often affiliated with major hospitals. They are board-certified and from the top U.S. medical schools with an average of 20 years of experience.

    We strictly adhere to HIPAA regulations, ensuring your personal and medical information is kept secure and confidential. Also, we comply with all applicable state and federal laws related to telehealth and the prescribing of medications.

    Therefore, you can rest assured knowing that your safety and privacy are our top priorities when you use DrHouse’s services.

  • DrHouse strives to provide accessible and affordable telehealth services. DrHouse urgent care, primary care, and specialist visits are $129 or your copay. This includes everything from your initial consultation through to the prescription of your medication.

    The cost of a doctor’s visit may be covered fully by your insurance. A typical copay is around $25. We recommend checking with your insurance provider to understand the extent of your coverage for telehealth services.

    To learn more about how much DrHouse costs, visit our pricing page

  • Yes, DrHouse accepts most major insurances, including Blue Cross Blue Shield, Aetna, and Medicare. The extent of coverage may vary depending on your individual plan.

  • Our physicians are able to prescribe up to a 90-day prescription without labs for any previously prescribed medication if it’s medically appropriate and is not classified as a controlled substance.

    DrHouse physicians also don’t prescribe Gabapentin, medical marijuana, muscle relaxants, and HRT medications.

    DrHouse physicians use their medical judgment to determine whether to prescribe and the duration.

    In certain cases, the prescription may be limited to 30 days or less. There also may be a 12-month cap for some prescriptions without labs. For medications requiring annual monitoring (such as blood work or imaging), the maximum prescription limit is 90 days within a year without labs.

    DrHouse physicians can refer patients to labs for longer prescription periods or refills.