Singulair Side Effects in Children

Singulair is a medication used to treat asthma and allergies. The generic name is montelukast. Side effects are typically not serious, and they differ among various age groups. Singulair is taken once a day to help control symptoms of asthma and allergies. It does not replace rescue inhalers for asthma attacks.

Six to 23 Months

Side effects for the age group of 6 to 23 months include upper respiratory infection, wheezing, ear infection, tonsillitis, rhinitis, cough and pharyngitis.

2 to 5 Years

In patients 2 to 5 years old, side effects include cough, fever, diarrhea, abdominal pain, headache, sinusitis, rash, ear pain, gastroenteritis, influenza, dermatitis, conjunctivitis and eczema.

Six to 14 Years

Side effects for patients 6 to 14 years old include influenza, fever, nausea, diarrhea, sinusitis, pharyngitis, dyspepsia, laryngitis and viral infection.

Drug Interactions

The use of phenobarbital or rifampin with singulair can increase montelukast blood concentration by as much as 40 percent. The dosage may need to be adjusted when taken with either of these drugs.

Serious Side Effects

A physician should be contacted immediately if any of the following symptoms appear: numbness of arms and legs, severe swelling and pain of the sinuses, or an illness similar to the flu.

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