Why is this medication prescribed? 

Montelukast is used to prevent asthma symptoms. It works by blocking the action of substances that cause inflammation, fluid retention, mucous secretion, and constriction in your lungs.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information. 

How should I take Singulair? 

Take montelukast exactly as directed by your doctor. If you do not understand these directions, ask your pharmacist, nurse, or doctor to explain them to you. 

Follow your doctor's instructions.

Do not stop taking montelukast without first talking to your doctor. It may be some time before you begin to notice effects from this medication. 

Continue taking any other asthma medications, as directed by your doctor. 

Singulair will not stop an asthma attack that has already begun. Keep another medication on hand to treat attacks. 

Seek medical attention if you notice that you require more than your usual or more than the maximum amount of any asthma medication in a 24-hour period. An increased need for medication could be an early sign of a serious asthma attack. 

Store Singulair at room temperature away from moisture and heat. 

What special precautions should I follow? 

Before taking Singulair

tell your doctor and pharmacist if you are allergic to montelukast or any other drugs. 
tell your doctor and pharmacist what prescription and nonprescription medications you are taking, especially phenobarbital (Solfoton), rifampin (Rifadin, Rimactane), and vitamins. 
tell your doctor if you have or have ever had phenylketonuria or liver disease. 
tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking montelukast, call your doctor. 
What should I do if I forget a dose? 
Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.

What side effects can this medication cause? 

Although side effects from montelukast are not common, they can occur. Tell your doctor if any of these symptoms are severe or do not go away: 

headache 
dizziness 
heartburn 
upset stomach 
tiredness 
stomach pain 
tooth pain 
stuffy nose 
cough 
If you experience either of the following symptoms, call your doctor immediately: 

increased difficulty breathing 
severe rash 
fever 
flu-like symptoms 

What storage conditions are needed for Singulair? 

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.

In case of emergency/overdose 

In case of Singulair overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

What other information should I know? 

Keep all appointments with your doctor and the laboratory.

Call your doctor if your asthma symptoms do not improve or worsen. Your doctor may order certain lab tests to check your response to montelukast.

Montelukast will not stop an acute attack that has already started. Continue to use the medication prescribed for your acute attacks.

Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.

Brand name(s): 

Singulair 

Disclaimer

This drug information is for your information purposes only, it is not intended that this information covers all uses, directions, drug interactions, precautions, or adverse effects of your medication. This is only general information, and should not be relied on for any purpose. It should not be construed as containing specific instructions for any particular patient. We disclaim all responsibility for the accuracy and reliability of this information, and/or any consequences arising from the use of this information, including damage or adverse consequences to persons or property, however such damages or consequences arise. No warranty, either expressed or implied, is made in regards to this information.