Singulair (montelukast) can be used to treat allergies in children as young as 6 months. Unlike most allergy medications, Singulair doesn’t usually cause drowsiness or sedation, which may make it a good choice for children who get sleepy when taking Zyrtec (cetirizine), Claritin (loratadine), or Clarinex (desloratadine).

This article discusses the prescription allergy and asthma medication Singulair and its use in children. Learn about how it works, child-friendly forms of the drug, and possible side effects.

Uses for Singulair in Children

Singulair is approved by the Food and Drug Administration (FDA) for:

  • Children 6 months and older with perennial allergic rhinitis
  • Children 6 months and older with indoor allergies
  • Children over 2 with seasonal allergic rhinitis
  • Children over 2 with outdoor allergies
  • Children 6 and older with exercise-induced asthma
  • Prevention of asthma attack and long-term asthma maintenance in children​ 12 months and older

How Singulair Works

The active ingredient in Singulair is montelukast sodium, a leukotriene receptor antagonist.

Not a Rescue Medication

Children should not take Singulair for the immediate relief of an asthma attack. A rescue inhaler is the best medication for that.

Leukotrienes are thought to cause many allergy and asthma symptoms, so blocking them with Singulair may help control your child’s symptoms.

Singulair is shown to help control children’s allergy symptoms, including:

  • SneezingStuffy noseRunny noseItchy nose

Child-Friendly Forms and How to Use Them

Forms of Singulair include:

  • Singulair Oral Granules (ages 6 months to 5 years)Singulair Chewable Tablets 4mg (ages 2 to 5 years)Singulair Chewable Tablets 5 mg (ages 6 to 14 years)Singulair Tablets 10 mg (ages 15 and above)

Oral granules and chewable tablets are the easiest for young kids who can’t swallow pills and won’t drink a liquid allergy medicine.

You can dissolve the granules in a teaspoon of infant formula or breast milk. You can also mix them with a spoonful of soft food, such as baby food, applesauce, rice, or ice cream or put them directly in your child’s mouth.

It’s a once-a-day medication, but children with asthma should take Singulair in the evening. Children with allergies can take it whenever it is convenient, preferably at about the same time each day.

Possible Side Effects of Singulair

Singulair is generally well tolerated by children. The most common side effects include:

  • Stomach pain
  • Stomach or intestinal upset
  • Heartburn
  • Tiredness
  • Fever
  • Stuffy nose
  • Cough
  • Upper respiratory infection
  • Dizziness
  • Headache
  • Rash

Less common side effects include:

  • Agitation and aggressive behavior
  • Allergic reactions
  • Hives and itching
  • Bad or vivid dreams
  • Increased bleeding tendency
  • Bruising
  • Diarrhea
  • Drowsiness
  • Hallucinations
  • Hepatitis
  • Indigestion
  • Pancreatitis
  • Irritability
  • Joint pain
  • Muscle aches
  • Muscle cramps
  • Nausea
  • Palpitations
  • Pins and needles/numbness
  • Restlessness
  • Seizures
  • Swelling
  • Trouble sleeping
  • Vomiting

Tell your healthcare provider right away if your child experiences any of the following potentially serious symptoms:

  • Pins and needles or numbness in the arms or legsFlu-like illnessRashSevere pain and swelling of the sinuses

Summary

The prescription medication Singulair is approved for use in children as young as 6 months. It can be used to treat allergies and asthma and is available in child-friendly forms such as oral granules and chewable tablets.

The FDA in 2009 required the manufacturer of Singulair to include a warning about an increased risk of depression, suicidal thoughts, and suicide. A 2018 study found the link between Singulair use and depression was weak and more likely represented a link between asthma and depression. Still, children taking Singulair and their parents should be aware of the warning.

Singulair may be a good option for treating your child’s allergies if you are concerned about drowsiness as a side effect. This medication can have other side effects, however, such as stomach pain and upset, dizziness, and upper respiratory infection.