Common use

Singulair (montelukast) is a selective leukotriene receptor antagonist — commonly referred to as a leukotriene inhibitor — prescribed for the treatment of asthma, prevention of exercise-induced asthma, and management of allergic rhinitis. This versatile allergy medication and asthma treatment works by blocking substances in the body called leukotrienes, which are powerful inflammatory chemicals released by the immune system that cause airway constriction, mucus production, and bronchial inflammation — the hallmark features of both asthma and allergic responses.

When you buy Singulair online, you gain access to a medication proven effective for bronchospasm prevention during physical activity, relief from seasonal and perennial allergic rhinitis symptoms (including sneezing, stuffy nose, runny nose, and nasal itching from both outdoor and indoor allergies), and long-term asthma control. Montelukast provides 24-hour protection with a single daily dose, making it one of the most convenient asthma treatment options available.

Singulair generic versions contain the same active ingredient — montelukast sodium — and deliver equivalent therapeutic results. Unlike inhaled corticosteroids, this leukotriene inhibitor is taken as a simple oral tablet, making it especially suitable for patients who have difficulty using inhalers or who prefer oral medication for their respiratory and allergy management. Buy montelukast from our trusted pharmacy for reliable, affordable access to this essential asthma and allergy medication. Singulair is particularly valued for its effectiveness in treating exercise-induced asthma in active individuals and athletes who need reliable bronchospasm prevention.



Dosage and directions

Singulair works best when taken consistently every day, regardless of whether symptoms are present. Swallow the tablet whole with a glass of water or milk. If you are taking the chewable tablet formulation, the tablet must be thoroughly chewed before swallowing for proper absorption.

Recommended dosing by age group: Adults and children 15 years and older — 10 mg once daily. Children ages 6 to 14 years — 5 mg (chewable tablet) once daily. Children ages 2 to 5 years — 4 mg (chewable tablet or granules) once daily. Children ages 6 to 23 months — one packet of oral granules (4 mg) once daily.

This allergy medication should be taken once daily in the evening for asthma treatment, or at any consistent time for allergic rhinitis management. For exercise-induced asthma prevention, take Singulair at least 2 hours before planned physical activity. Do not take an additional dose if you have already taken your daily dose. Safety and effectiveness in pediatric patients younger than 12 months of age have not been established.

Note: this instruction is presented for review purposes only. Consult with your healthcare provider before starting montelukast to ensure optimal dosing for your specific condition.



Precautions

Singulair should not be used for the treatment of acute asthma attacks — it is a preventive controller medication, not a rescue treatment. Keep your fast-acting bronchodilator inhaler available at all times for acute symptom relief. Montelukast should not be abruptly substituted for inhaled or oral corticosteroids; any changes to your asthma treatment regimen should be made gradually under medical supervision.

This leukotriene inhibitor is suitable for children 6 years and older (tablet form) and younger children (chewable tablets and granules as appropriate for age). If you have asthma that is worsened by aspirin, continue to avoid aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs) while taking Singulair, as montelukast does not completely block aspirin-induced bronchospasm.

Important mental health warning: Some patients taking montelukast have reported neuropsychiatric events including mood changes, agitation, depression, sleep disturbances, and suicidal thoughts. If you or a family member notice any behavioral or mood changes while taking this medication, discontinue use and contact your healthcare provider immediately. Discuss the risks and benefits of this asthma treatment thoroughly with your doctor.



Contraindications

Singulair is not permitted for use in patients with known hypersensitivity to montelukast sodium or any other component of this product. If you have experienced an allergic reaction to this medication in the past, inform your doctor before receiving any prescription for leukotriene inhibitor therapy. Your healthcare provider will evaluate alternative asthma treatment or allergy medication options.



Possible side effect

Side effects may include allergic reactions such as: hives, difficulty breathing, and swelling of the face, lips, tongue, or throat. Seek emergency medical attention if these symptoms occur. The most serious possible side effects of Singulair include:

skin rash, bruising, severe tingling, numbness, pain, or muscle weakness;

mood or behavior changes, anxiety, depression, or thoughts about suicide or self-harm;

tremors or shaking;

severe sinus pain, swelling, or irritation;

worsening asthma symptoms despite regular use.

Less serious and more common side effects include:

headache;

stomach pain, heartburn, upset stomach, nausea, diarrhea;

tooth pain;

fatigue or tired feeling;

fever, stuffy nose, sore throat, cough, hoarseness;

mild skin rash.

If you experience any of these symptoms, stop using Singulair and consult your doctor as soon as possible. Report any unusual or persistent side effects to your healthcare provider for evaluation and appropriate management of your allergy medication or asthma treatment plan.



Drug interactions

Singulair may interact with several medications. Inform your doctor about all prescriptions and over-the-counter products you are taking, including: phenobarbital, rifampin (which may decrease montelukast blood levels), and gemfibrozil (which may increase montelukast blood levels). Additionally, certain drugs for high blood pressure, HIV/AIDS medications, antifungal agents such as fluconazole, itraconazole, ketoconazole, and voriconazole, cimetidine, and erythromycin may interact with this leukotriene inhibitor.

Note that an interaction between two medications does not always require discontinuation of one of them. Drug interactions often affect the potency or metabolism of medications, so consult with your doctor about how these interactions are being managed or should be managed for your specific asthma treatment or allergic rhinitis therapy.



Missed dose

If you forget to take your dose of Singulair at the scheduled time, take it as soon as you remember. However, if it is close to the time for your next dose, skip the missed one and continue your regular dosing schedule. Do not double your dose to compensate. Consistent daily use of this leukotriene inhibitor provides the best bronchospasm prevention and allergy symptom control.



Overdose

If you take more than the prescribed dose of Singulair, symptoms may include excessive thirst, drowsiness, dilated pupils, increased muscle movements, hyperactivity, or severe stomach pain. If you experience any of these symptoms, contact your doctor or poison control center immediately. Seek emergency medical attention for severe overdose symptoms.



Storage

Store Singulair at room temperature between 59-77 degrees F (15-25 degrees C) in a dry location protected from direct light and moisture. Keep out of reach of children and pets. Do not use after the expiration date printed on the packaging.



Disclaimer

We provide only general information about medications which does not cover all directions, possible drug integrations, or precautions. Information at the site cannot be used for self-treatment and self-diagnosis. Any specific instructions for a particular patient should be agreed with your health care adviser or doctor in charge of the case. We disclaim reliability of this information and mistakes it could contain. We are not responsible for any direct, indirect, special or other indirect damage as a result of any use of the information on this site and also for consequences of self-treatment.