Side Effects of Montelukast

Montelukast Sodium

Common Side Effects of Montelukast in Children

In clinical studies, common side effects of montelukast (occurring in at least 2 percent of children) included:

Sore throat
The flu
Fever
Sinus infection
Diarrhea
Indigestion or heartburn
Ear infection
Laryngitis (inflammation of the voice box, often causing a loss of voice)
Headaches
Chickenpox
Tooth infection
Vision changes
Cough
Abdominal pain (stomach pain)
Eczema
Pneumonia
Conjunctivitis ("pink eye")
Tonsillitis.

Serious Side Effects of Montelukast

Some side effects with montelukast are potentially serious and should be reported immediately to your healthcare provider. These include, but are not limited to:

Worsening of asthma or allergies
Depression (see Singulair and Depression)
Hallucinations
Signs of liver damage, such as:
- Yellow eyes or skin
- Dark urine
- Upper abdominal pain

Signs of an allergic reaction, including:
- Unexplained rash
- Hives
- Itching
- Unexplained swelling.

Side Effects of Montelukast: Final Thoughts

You may experience some or none of the side effects of montelukast listed in this article. Unfortunately, there is no way for your healthcare provider to know beforehand if you will have side effects from a medicine that you have never tried. Therefore, make sure to let your healthcare provider know if you develop any side effects while taking the drug. Also, let your healthcare provider know if you develop something that "just does not seem right." While it may not be a side effect of montelukast, your healthcare provider will be able to diagnose and treat the problem.

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