Singulair is a prescription medicine which is used to prevent asthma attacks in adults and children as young as 12 months old. It is also used in adults to relieve a runny nose and sneezing caused by allergies.
What is the most important information I should know about Singulair?
Do not use Singulair to treat an asthma attack that has already begun as it cannot replace fast acting inhaler for these kinds of sudden symptoms. Use only a fast-acting inhalation medication to treat an asthma attack. It may take up to several weeks of using this medicine before your symptoms improve. For best results, keep using the medication as directed by your doctor.
If you already take Singulair to prevent asthma or allergy symptoms, do not use it for exercise-induced bronchoconstriction.
What should I discuss with my healthcare provider before taking Singulair?
- Inform your doctor if you are pregnant or plan to become pregnant during treatment.
- Tell your doctor if you are breast feeding.
- Tell your doctor if you are taking any prescription, nonprescription medicine or dietary supplements.
- Tell your doctor if you have any other medical conditions.
Do not use Singulair if you
- Are allergic to montelukast.
- Are allergic to any drugs (especially aspirin).
- Have liver disease
- Have phenylketonuria (PKU).
How should I take Singulair?
Always take Singulair exactly as prescribed by your doctor. It should be taken once daily in the evening for prevention of asthma or allergy symptoms. For exercise-induced bronchoconstriction, take a single dose at least 2 hours before you exercise, and do not take another dose for at least 24 hours.
Take the tablet with a full glass of water. The 5mg and 4mg chewable tablet must be chewed completely before you swallow it. The 10mg strength must be swallowed whole and cannot be split in half.
Do not save an open packet or mixed medicine for later use. If you also take a steroid asthma medicine, do not stop using it suddenly without first consulting your doctor.
Side effects of Singulair
Common side effects
- Upset stomach, nausea, diarrhea;
- mouth pain;
- tired feeling;
- dizziness, headache;
- sore throat, cough, hoarseness; or
- stuffy nose.
Serious side effects
- Skin rash, bruising, severe tingling, numbness, pain, muscle weakness;
- severe sinus pain, swelling, or irritation; or
- worsening asthma symptoms.
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