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Singulair 10mg Tablet
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Indications & Clinical Uses
- Singulair 10mg film-coated tablets contain montelukast sodium, a leukotriene receptor antagonist that blocks inflammatory mediators involved in asthma and allergic rhinitis.
- The 10mg tablet is approved for the prevention and chronic treatment of asthma in adults and adolescents 15 years of age and older, for prevention of exercise-induced bronchoconstriction from 6 years of age, and for relief of symptoms of seasonal allergic rhinitis from 2 years of age and perennial allergic rhinitis from 6 months of age, using the strength and formulation appropriate to each age group.
- It is a once-daily oral tablet, not a rescue medicine for sudden breathlessness.
- This 10mg tablet is a distinct, adult/adolescent-strength product from the Singulair 4mg chewable tablet and 4mg oral granules made for younger children; do not use them interchangeably.
- Montelukast is also marketed generically once patent protection has ended in most markets.
Side Effects
- Common Singulair side effects include headache, abdominal pain, cough, upper respiratory infection, fever and diarrhoea.
- Singulair carries a boxed warning for serious neuropsychiatric events, including agitation, aggressive behaviour or hostility, anxiety, depression, disorientation, tremor, sleep disturbances and, rarely, suicidal thinking or behaviour, which can occur even in people with no previous psychiatric history.
- Tell your healthcare provider immediately, and stop Singulair, if you or your child develop new mood or behaviour changes.
- Rare but serious reactions include severe allergic reactions, liver problems, and eosinophilic conditions such as Churg-Strauss syndrome, particularly when oral steroids are reduced.
- Seek urgent care for suicidal thoughts, severe allergic swelling, breathing difficulty, or yellowing of the skin or eyes.
Precautions & Warnings
- Singulair is not a bronchodilator and must not be used to treat an acute asthma attack; patients should always carry their rescue inhaler.
- Because of the boxed warning for neuropsychiatric events, weigh the benefits and risks carefully before starting Singulair, particularly for allergic rhinitis alone where the risk-benefit balance is less favourable than for asthma.
- Aspirin-sensitive asthma patients should continue avoiding aspirin and NSAIDs while taking Singulair.
- Reducing oral corticosteroids while on Singulair has rarely been associated with eosinophilic vasculitis (Churg-Strauss syndrome); report numbness, tingling, rash or worsening breathing.
- Liver function should be monitored if symptoms of liver problems occur.
- Data on use in pregnancy and breastfeeding are limited; discuss individual risk with your healthcare provider.
Avoid Interactions
- Tell your healthcare provider about every medicine and supplement you take before starting Singulair.
- Phenobarbital and rifampin, which strongly induce liver enzymes, can reduce montelukast blood levels by around 40 percent and may need closer monitoring of symptom control.
- Singulair does not meaningfully change levels of theophylline, warfarin, digoxin or oral contraceptives, and generally does not require dose adjustments with common medicines.
- Continue other prescribed asthma or allergy treatments, including inhaled steroids, unless your healthcare provider tells you to stop; do not reduce oral steroids on your own.
- There is no specific food interaction, and Singulair can be taken with or without food.
References
Frequently Asked Questions
Singulair 10mg (montelukast) tablets prevent and treat asthma in adults and adolescents aged 15 and over. They also relieve seasonal and perennial allergic rhinitis symptoms. It is not a quick-relief inhaler and will not stop an asthma attack already in progress.
Singulair 10mg is one tablet swallowed by mouth once daily, with or without food, usually in the evening. Keep taking it every day, even when you feel well, since it works by preventing symptoms, not treating a sudden attack. Always carry a rescue inhaler separately.
Common Singulair side effects include headache, abdominal pain, cough and upper respiratory infection. Singulair has a boxed warning for serious neuropsychiatric effects, such as agitation, depression, sleep problems and, rarely, suicidal thoughts. Tell your healthcare provider immediately about any new mood or behaviour changes.
Tell your healthcare provider about all your medicines, since phenobarbital and rifampin can lower Singulair (montelukast) levels by about 40 percent. Do not reduce or stop an oral steroid on your own while taking Singulair, as this has rarely been linked to a serious eosinophilic reaction.
If you miss a dose of Singulair, take it when you remember unless it is close to the next dose, then skip the missed one. Do not double up. Store the tablets at room temperature, and keep taking Singulair daily even if your asthma or allergy symptoms feel controlled.
Yes. Singulair carries a boxed warning because it can cause serious neuropsychiatric events, including agitation, aggression, anxiety, depression, nightmares and, rarely, suicidal thoughts or behaviour, even in people with no prior mental health history. Seek help immediately for any new or worsening mood or behaviour change.
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