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Side Effects of Singulair

Taking any medication can put you at risk for side effects. You can decide if Singulair is the allergy medicine for you, once you know its side effects.

  1. Illness

    • In adults and children, Singulair can cause the flu. In children it has also been known to cause diarrhea, chicken pox and ear infections.

    Abdominal Issues

    • Abdominal problems, indigestion, heartburn and gastrointestinal infections are side effects that may affect both children and adults.

    Aches, Pains & Sore Throat

    • Headaches and sore throats are side effects that can happen to children and adults who take Singulair.

    Sinus & Lungs

    • Sinus infections, pneumonia, nasal congestion and laryngitis are some side effects that may affect anyone.

    Less Common

    • Though less common, some more serious symptoms are possible, including your asthma and allergies becoming worse. Depression, hallucinations, possible liver damage and having an allergic reaction are also possible.

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