Drug name

Singulair (Montelukast)

Drug Uses

Montelukast is used for the treatment of asthma and seasonal allergic rhinitis. Montelukast begins working after 3 to 14 days of therapy. Therefore, it should not be used for the treatment of an acute asthmatic attack.

How Taken

The recommended dose of montelukast is 4, 5, or 10 mg daily. The 4 and 5 mg tablets are used in children. Montelukast should be taken in the evening with or without food.

Missed Dose

Take the missed dose as soon as you remember. However, if it is almost time for the next dose, skip the missed dose and take the next regularly scheduled dose as directed. Do not take a double dose of this medication.

Storage

Tablets should be stored at room temperature, 15-30 degrees C (59-86 degrees F).

Possible Side Effects

The most common side effects with montelukast are headache, dizziness, abdominal pain, sore throat, and rhinitis (inflammation of the inner lining of the nose). These side effects occur in 1 in 50 to 1 in 7 persons who take montelukast.

More Information

• If you experience any of the following serious side effects, stop taking montelukast and seek emergency medical attention or notify your doctor immediately:
  • an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);
  • numbness, tingling, or pain;
  • a rash or unexplained open sores or bruising;
  • a flu-like illness;
  • severe inflammation (pain and swelling) of the sinuses; or
  • worsening respiratory symptoms.
• Other, less serious side effects may be more likely to occur. Continue to take montelukast and talk to your doctor if you experience
  • upset stomach, stomach pain, or heartburn;
  • dizziness or headache;
  • tiredness;
  • sore throat or cough, or
  • nasal irritation.
• Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.