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Formulation : Tablet
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Dosage: 10mg
Quantity: 28
Price: $39.50
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Formulation : Tablet
Drug Name Dosage Quantity Price Buy Now
Montelukast 10mg 28 $26.20 Add To Cart
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Dosage: 10mg
Quantity: 28
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Singulair is a leukotriene medication used to treat and prevent asthma attacks, exercise-induced bronchoconstriction (EIB), and allergy symptoms.

Montelukast is a cysteinyl leukotriene receptor antagonist that treats asthma by blocking inflammation in the airway and lungs. Thanks to the medication’s actions in your airways, Singulair can help reduce responses to allergies. This medication can also improve lung function and reduce swelling that causes asthma and EIB.

Singulair is a well-tolerated asthma medication that is quickly absorbed so it can provide fast relief. The medication can be used to treat a variety of asthma-related conditions in children and adults.

Uses and Dosage

The dose prescribed for Singulair will depend on the person and condition being treated. Always follow your doctor’s instruction and read packaging labels carefully when taking medication.

  • Take in the evening
  • For exercise-induced bronchoconstriction, take a dose 2 hours before exercising
  • Take doses at least 24 hours apart
  • Swallow tablet whole with a glass of water
  • Most 15 years and older take 10mg once daily
  • If taking Singulair daily, do not take an additional dose to prevent EIB
  • Symptoms may take several weeks to fully improve
  • Do not stop taking Singulair without talking to your doctor
  • Store at room temperature away from moisture and heat

Side Effects

Singulair may cause some side effects while it works to prevent asthma attacks. Consult with your doctor for more information and advice regarding any symptoms you may encounter when taking montelukast.

Common Singulair side effects:

  • Stomach pain
  • Diarrhea
  • Fever or flu symptoms
  • Ear pain, trouble hearing
  • Headache
  • Cold symptoms (runny nose, sinus pain, cough, sore throat)

Serious Side Effects

Some more serious side effects may occur while taking Singulair. Stop taking this medication and call your doctor right away if you develop any of the following symptoms:

  • Agitation, aggression, feeling restless or irritable
  • Anxiety, depression, confusion, memory problems
  • Stuttering, tremors, uncontrollable muscle movements
  • Suicidal thoughts or actions
  • Hallucinations, insomnia, vivid dreams, sleep walking
  • Compulsive or repetitive behaviours

Call your doctor immediately if you develop signs of blood vessel inflammation which include flu-like symptoms, severe sinus pain, skin rash, or a numbness or tingling in your arms or legs.

Allergic Reactions

Do not use Singulair if you are allergic to montelukast. If you notice signs of an allergic reaction, stop taking this asthma medication and contact your doctor right away.

Singulair allergy symptoms may include:

  • Hives
  • Blisters
  • Severe itching
  • Difficulty breathing
  • Swelling of face, lips, tongue, or throat


Singulair does not work quick enough to treat an asthma attack that has already begun, use fast-acting inhalation medicine during an attack.

Some people that use Singulair develop new or worsening problems with their mental health. Stop taking this medication and call your doctor if you notice unusual changes in your mood or behaviour. These changes may include anger, aggression, confusion, insomnia, compulsive behaviours, hallucinations, or suicidal thoughts.

Singulair may cause blood vessel inflammation; call your doctor right away if you notice flu-like symptoms, severe sinus pain, a rash, or numbness in your arms or legs.

Contact your doctor if Singular doesn’t seem to be working as well as usual or if it is making your condition worse. If you feel you need more medication within a 24-hour period, speak with your doctor.

Symptoms may take several weeks to improve. Continue using Singulair as prescribed and consult with your doctor if symptoms persist past several weeks of treatment.

To ensure the safety of taking Singulair, tell your doctor if you have ever had the following:

  • Mental illness or psychosis
  • Asthma
  • History of severe allergic reaction after taking non-steroidal anti-inflammatory medication such as aspirin

Before using this medication, tell your doctor if you are pregnant or breastfeeding.

Singulair should not be given to a child without a doctor’s direction.

Avoid activities that may trigger an asthma attack while taking Singulair.

If asthma symptoms worsen after taking an aspirin or other nonsteroidal anti-inflammatory drugs, avoid taking them.

Form and Strength

This asthma medication is available in tablet form.

Singulair tablet strength:

  • 10mg

The 10mg tablets are available in quantities of 28 or 84.


How long does Singulair stay in your system?

Singulair takes roughly 30 hours before it fully leaves your system. This number will vary depending on how quickly your body metabolizes the drugs as well as other factors such as how often the medication is taken. The 30 hours allow for complete protection when taken daily to prevent asthma attacks.

Does Singulair cause side effects?

Like most medications, Singulair can lead to side effects, but it has a low incidence of adverse reactions. The most common side effects of montelukast include stomach pain, headaches, and symptoms of a cold or flu. Sometimes mental health issues can develop but this is less common; the medication is generally well tolerated.



Additional information

Brand Name:


Scientific Name:


Other Names:

Montelukast, Singulair



Quantities Available:

28, 84