DrugInformer Search


Ingredients: Montelukast Sodium
Average User Review Score
* Based on 2230 reviews from across the web.

Montelukast (trade name Singulair) is a leukotriene receptor antagonist (LTRA) used for the maintenance treatment of asthma and to relieve symptoms of seasonal allergies. Montelukast comes as a tablet, a chewable tablet, flash tablet and granules to take by mouth. Montelukast is usually taken once a day with or without food. Montelukast is a CysLT1 antagonist; it blocks the action of leukotriene D4 (and secondary ligands LTC4 and LTE4) on the cysteinyl leukotriene receptor CysLT1 in the lungs and bronchial tubes by binding to it. This reduces the bronchoconstriction otherwise caused by the leukotriene and results in less inflammation.

Read more on Wikipedia

  Please use Workbench for in-depth research on Singulair.

Common adverse events from online conversations
* Extracted from FDA Adverse Event Reports for all drugs with the same active ingredients.

Tell us about your Experience with Singulair

Thank you for sharing your experience with us!

Share Your Experience

Druginformer Identified Side Effects: Back pain

Effectiveness Rating:     Overall Rating:

Posted By Jim on March 18, 2019 @ 9:34 am

I’ve been disabled this morning by the debilitating back pain in my mid back. It’s incredibly painful to move around, I was crawling on all fours this morning trying to get to some meds for pain relief but couldn’t get to them myself. I woke up my wife to assist. I took a muscle relaxer which seems to help, but I won’t be taking anymore Singulair.

Druginformer Identified Side Effects: Weight increased, Alopecia

Effectiveness Rating:     Overall Rating:

Posted By michelle on April 11, 2018 @ 8:19 pm

Definitely from the use of Singulair. I gained 13 lbs in my mid section in one month. I couldn’t get it off and I have never struggled with weight issues. As soon as I stopped using it the weight started to drop. Still seeing hair thinning. I wish they would list those side effects because they are side effects of that medication.

Druginformer Identified Side Effects: Pain, Hypersensitivity, Nightmare, Somnambulism, Oedema peripheral, Abasia

Posted By Anonymous in askapatient.com on September 17, 2015 @ 12:00 am

... violent nighttime episodes where I believed someone had entered my room while I slept and I attacked them. It turns out I was only attacking my lamp, and a wall. The 3rd time I hurt myself so bad that...

Druginformer Identified Side Effects: Crying, Anxiety, Adverse drug reaction, Suicidal behaviour

Posted By Anonymous in askapatient.com on September 15, 2015 @ 12:00 am

Side Effects: I took montkelust for several days and I cried, had anxiety, lost my temper and contemplated suicide. I am a happy, stable person and was baffled at the irrationality of my thoughts. Th...

Druginformer Identified Side Effects: Sleep disorder, Anger, Depression

Posted By Anonymous in askapatient.com on September 11, 2015 @ 12:00 am

Side Effects: Sleepless nights, depression, quick to anger and most importantly violent voices yelling in my daughters head. She was terrified. We stopped after 7 days and the side effects ...

Druginformer Identified Side Effects: Wheezing, Nightmare, Anxiety, Cardiac flutter, Abnormal dreams, Cough, Depression, Heart rate irregular, Panic attack, Fear

Posted By Anonymous in askapatient.com on September 9, 2015 @ 12:00 am

... and depression. After leaving the ER, I quit taking. It has only been 2 days..palpitations are less frequent. Side effects are not worth it...but the drug helped my throat wheezing during night and...

Druginformer Identified Side Effects: Crying, Depression, Muscular weakness, Emotional distress, Fear

Posted By Anonymous in askapatient.com on September 3, 2015 @ 12:00 am

Side Effects: Extreme depression, wanting to cry all the time, fear, extreme emotional weakness The longer I took the weaker I became emotionally, I have been off for 3 months still do not...

Druginformer Identified Side Effects: Abnormal weight gain, Insomnia, Weight increased, Hot flush

Posted By Anonymous in askapatient.com on August 20, 2015 @ 12:00 am

Side Effects: insomnia, weight gain, hot flashes although I didn't have any flairups with my asthma, this drug was not worth all the side effects. I gained weight tremendously fast in the ...

Druginformer Identified Side Effects: Chest pain, Pain, Pruritus, Depression

Posted By Anonymous in askapatient.com on August 19, 2015 @ 12:00 am

... take texa to stop this. My memory has become really bad and I am even on anti depressants now. If I take my tabs an hour later than usual, I experience these serious painful chest pains, feels like I ...

Druginformer Identified Side Effects: Hypoaesthesia, Decompression sickness, Dry mouth, Dyspnoea paroxysmal nocturnal, Paraesthesia

Posted By Anonymous in askapatient.com on August 8, 2015 @ 12:00 am

Side Effects: It does help with PND. But the side effects of the tingling and numbness are just not worth taking it. It also makes you feel like you are choking and gives you an extremely dry mouth a...

* Warning: The facts and figures contained in these reports are accurate to the best of our capability; however, our metrics are only meant to augment your medical knowledge, and should never be used as the sole basis for selecting a new medication. As with any medical decision, be sure to work with your doctor to ensure the best choices are made for your condition.

* About FAERS: The FDA Adverse Event Reporting System (FAERS) is used by FDA for activities such as looking for new safety concerns that might be related to a marketed product, evaluating a manufacturer's compliance to reporting regulations and responding to outside requests for information. Reporting of adverse events is a voluntary process, and not every report is sent to FDA and entered into FAERS. The FAERS database may contain duplicate reports, the report quality is variable, and many factors may influence reporting (e.g., media attention, length of time a drug is marketed, market share). For these reasons, FAERS case reports cannot be used to calculate incidence or estimates of risk for a particular product or compare risks between products.