Montelukast (Singulair): Patient Information
What is montelukast (Singulair)?
Montelukast is a leukotrines inhibitor. Leukotrines are chemicals your body releases when you breathe in an allergen. These chemicals cause swelling in your lungs and tightening of the muscles around your airways, which can result in asthma symptoms. Montelukast is used to prevent asthma attacks in adults and children as young as 12 months old. It is also used to relieve runny nose and sneezing caused by allergies in adults and children as young as 6 months old.
How should I take montelukast?
- Montelukast should normally be taken in the evening.
- Montelukast should be taken each day so try not to miss any doses.
- Tablets should be swallowed whole.
- Granules can be mixed with cold food but not liquid, or simply swallowed.
What are the possible side effects of montelukast?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Speak to your doctor at once if you have any of these serious side effects:
- Skin rash, bruising, severe tingling, and numbness.
- Mood or behavior changes, depression, or thoughts about suicide.
- Worsening asthma symptoms.
What should I know before taken this medication?
Do not use montelukast to treat an asthma attack that has already begun. It will not work fast enough to reverse your symptoms.
It may take up to several weeks of using this medicine before your symptoms improve. For best results, keep using the medication as directed.
Call your doctor at once if you have any mood or behavior changes, anxiety, depression, or thoughts about suicide or hurting yourself.
Tell your doctor immediately if any of these highly unlikely but very serious side effects occur: mental/mood changes (e.g., agitation, hallucinations, suicidal thoughts/suicide), stomach pain, muscle aches/cramps, irregular heartbeat, dark urine, yellowing eyes and skin, numbness or tingling of the hands or feet, dull sense of touch, easy bruising or bleeding, swelling, seizures.
What should I do if I missed a dose?
If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule.
Where should I store the medication?
Store at room temperature at 25 degrees C away from light and moisture.
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