Drug Uses

Singulair is used for prevention and long-term treatment of asthma. It is also used in certain patients to relieve runny nose caused by allergy and to prevent asthma attacks caused by exercise. It may also be used for other conditions as determined by your doctor.

How to use

Use Singulair as directed by your doctor. Check the label on the medicine for exact dosing instructions. Check the label on the medicine for exact dosing instructions. An extra patient leaflet is available with Singulair . Talk to your pharmacist if you have questions about this information. Take Singulair by mouth with or without food.
Continue to use Singulair even if you feel well. Do not miss any doses.
If you miss a dose of Singulair , take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Drug Class and Mechanism

Singulair is a leukotriene receptor antagonist. It works by blocking a substance called leukotriene, which helps to decrease certain asthma and allergy symptoms.

Missed Dose

If you miss a dose of Singulair , take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Storage

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

Warnings/Precautions

Some medical conditions may interact with Singulair . Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

if you are pregnant, planning to become pregnant, or are breast-feeding
if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
if you have allergies to medicines, foods, or other substances
if you have liver problems
if you have a history of mental or mood problems, or suicidal thoughts or actions

Some MEDICINES MAY INTERACT with Singulair . Tell your health care provider if you are taking any other medicines, especially any of the following:
Certain anticonvulsants (eg, phenobarbital) or rifampin because they may decrease Singulair 's effectiveness

Possible Side Effects

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Cough; dizziness; headache; indigestion; nausea; stomach upset or pain; stuffy nose; tiredness; trouble sleeping; weakness.
Seek medical attention right away if any of these SEVERE side effects occur:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); aggressive behavior; agitation; dark urine; fever; flu-like symptoms; hallucinations; irregular heartbeat; mental or mood changes; new or worsening wheezing or other breathing problems; numbness or tingling of hands or feet; seizures; severe or persistent stomach pain; severe sinus inflammation; suicidal thoughts or actions; swelling; unusual bruising or bleeding; upper respiratory tract infection; yellowing of the skin or eyes.
More Information

If you have any questions about Singulair , please talk with your doctor, pharmacist, or other health care provider.
Singulair is to be used only by the patient for whom it is prescribed. Do not share it with other people.
If your symptoms do not improve or if they become worse, check with your doctor.