Singulair (Oral)

Questions | Reviews **~

Use of singulair and GERD

My son, age 12, has developed gastric reflux. He has been taking singulair 10mg. for about 3 months. When he was younger (about age 8) he had stomach pains after taking singulair 5mg. for a few months. We stopped the medication at that time and t...
by cynthia couch in Houston, TX, 11/09/2006

Mixing medications

My daughter was prescribed Singulair yesterday for weezing. Can she take a cough suppressant when on Singulair? Her cough is worse than before and we would like to do something to help the weezing as it is getting worse.
by Ann Riddle in Toledo, OH, 01/03/2006

Singulair (Oral) Drug and Prescription Information

Singulair (Oral)

Singulair (Oral) Medication Classification


Singulair (Oral) Brandname


Singulair (Oral) is used for the Treatment

Montelukast (mon-te-LOO-kast) Helps prevent and control asthma attacks.

When To Not Use Singulair (Oral)

You should not use this medicine if you have had an allergic reaction to montelukast.

How Should You Use Singulair (Oral)

Tablet, Chewable Tablet, Packet

  • Your doctor will tell you how much of this medicine to take and how often. Do not take more medicine or take it more often than your doctor tells you to.
  • This medicine comes with patient instructions. Read and follow these instructions carefully. Ask your doctor or pharmacist if you have any questions.
  • You may take this medicine with or without food. Take the medicine at the same time every evening unless your doctor tells you otherwise.
  • Swallow the tablet whole. Do not break, crush, or chew it. The chewable tablet must be chewed before you swallow it.
  • Do not open the packet of oral granules until you are ready to use it. You can give the oral granules to a child in two different ways. Choose one way that works best for your child.
  • You can put the oral granules directly on a spoon, then into the child's mouth.
  • or you can mix the oral granules with applesauce, mashed carrots, rice, or ice cream. The food should be cold or room temperature. Do not mix the medicine with a liquid drink. Use the mixed medicine right away. Do not save any mixed medicine to use later.
  • If a dose is missed:
  • If you miss a dose or forget to take your medicine, take it as soon as you can. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose.
  • Do not use extra medicine to make up for a missed dose.

Proper Singulair (Oral) Storage

Store Singulair (Oral) at room temperature away from sunlight and moisture unless otherwise stated by manufacturer's instructions or labelling. Keep Singulair (Oral) and all medications out of the reach of children.

What To Avoid While Using Singulair (Oral)

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

  • Make sure your doctor knows if you are taking phenobarbital.

Singulair (Oral) Warnings

  • Make sure your doctor knows if you are pregnant or breast feeding, or if you have liver disease or are allergic to aspirin.
  • This medicine will not stop an asthma attack that has already started. Your doctor may prescribe another medicine for you to use in case of an acute asthma attack.
  • If you use any type of corticosteroid medicine to control your asthma, keep using it as ordered by your doctor. This includes corticosteroid medicines that are taken by mouth or inhaled (such as cortisone, prednisone, Azmacort®, Celestone®, Cortone®, Deltasone®, Flovent®, Prelone® Pediapred®, Vanceril®).
  • If any of your asthma medicines do not seem to be working as well as usual, call your doctor right away. Do not change your doses or stop using your medicines without asking your doctor.
  • This medicine may make you dizzy or drowsy. Avoid driving, using machines, or doing anything else that could be dangerous if you are not alert.
  • The chewable tablet contains phenylalanine. Tell your doctor if you have PKU (phenylketonuria) before taking the chewable tablet.

Singulair (Oral) Side Effects

Call your doctor right away if you notice any of these side effects:

  • Allergic reaction: Itching or hives, swelling in face or hands, swelling or tingling in the mouth or throat, tightness in chest, trouble breathing
  • Fast, slow, or irregular heartbeat
  • Numbness or tingling in the hands, arms, legs, or feet
  • If you notice these less serious side effects, talk with your doctor:
  • Cough or flu symptoms
  • Diarrhea, indigestion, nausea, vomiting
  • Headache
  • Restlessness or feeling irritable
  • Unusual dreams or trouble sleeping

Singulair (Oral) Ratings

Overall Rating:



(based on 3 reviews)



Ease of Use:


Overall Satisfaction:




Singulair (Oral)

Effectiveness: ***

Ease of Use: ***

Overall Satisfaction: **


Lynn, Phoenix, AZ - 03/30/2012

I have found singular does cause me to have kidney discomfort, the half life is 5.5 x 5.5 or 30 hours, to get one 10mg out of your system.
That one pill will still be around in decreasing amounts for up to 30 hours so if you have a side effect, dont give it another chance as is stays in your system for awhile, which is normally a good thing for people it works for.

Singulair (Oral)

Effectiveness: *

Ease of Use: *

Overall Satisfaction: *


Laura, Radford. VA - 04/27/2009

I am waiting to talk to my doctor before taking Singulair. I have been doing a lot of reading and I have questions.

Singulair (Oral)

Effectiveness: *****

Ease of Use: *****

Overall Satisfaction: ***


C.KANNAN, ohio - 09/14/2009

For eight months now, my 11 year old son has been taking Singulair. It seemed to be working great and I never noticed that there were any side effects. However, while going to his regular check up the other day, his resting heart beat was 128 bpm. His doctor mentioned that she had another patient, the same age as my son, that had the same increased heart rate that she had just seen recently. It turned out that this is a side effect of Singulair she told me and that the other boy had seen a cardiologist and found this out from them. My son's regular doctor and his allergist had never heard of this happening. His heart rate was 115 bpm when we left an hour later after doing an EKG. It was 84 this morning, since he did not take his medications the night before. He will be switched to Allegra and he is still taking Flovent, I hope this all works. He has always been a contrary kid and this had never changed any more than usual. However, we will see what happens now that he is off Singulair. It did work, which is so disappointing.