Singulair and Toxic encephalopathy - a phase IV clinical study of FDA data

Summary:

Toxic encephalopathy is reported as a side effect among people who take Singulair (montelukast sodium), especially for people who are female, 50-59 old, also take Cymbalta, and have Migraine.

The phase IV clinical study analyzes which people have Toxic encephalopathy when taking Singulair. It is created by eHealthMe based on reports of 125,532 people who have side effects when taking Singulair from the FDA, and is updated regularly.

What is Singulair?

Singulair has active ingredients of montelukast sodium. It is often used in asthma. eHealthMe is studying from 129,752 Singulair users. Check the latest studies of Singulair.

What is Toxic encephalopathy?

Toxic encephalopathy (a degenerative neurologic disorder caused by exposure to toxic substances) is found to be associated with 424 drugs and 615 conditions by eHealthMe. Check the latest studies of Toxic encephalopathy.

On Jul, 05, 2026

125,532 people reported to have side effects when taking Singulair.
Among them, 16 people (0.01%) have Toxic encephalopathy.

Could Singulair cause Toxic encephalopathy?

Among these 16 people:

What is the gender of people who have Toxic encephalopathy when taking Singulair? *

female: 92.86 %
male: 7.14 %

What is the age of people who have Toxic encephalopathy when taking Singulair? *

What are other drugs people take besides Singulair? *

What are other side effects people have besides Toxic encephalopathy? *

Fall: 5 people, 31.25%
Headache (pain in head): 5 people, 31.25%
Pain: 5 people, 31.25%
Respiratory Acidosis (respiratory failure or ventilatory failure, causes the ph of blood and other bodily fluids to decrease): 5 people, 31.25%
Hypokalemia (low potassium): 5 people, 31.25%
Confusional State: 4 people, 25.00%
Hypotension (abnormally low blood pressure): 4 people, 25.00%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 3 people, 18.75%
Femur Fracture: 3 people, 18.75%
Nasal Congestion (blockage of the nasal passages usually due to membranes lining the nose becoming swollen from inflamed blood vessels): 3 people, 18.75%

What are the existing conditions these people have? *

Depression: 4 people, 25.00%
Migraine (headache): 4 people, 25.00%
Irritable Bowel Syndrome: 3 people, 18.75%
Oedema (fluid collection in tissue): 3 people, 18.75%
Drowsiness: 3 people, 18.75%
Fibromyalgia (a long-term condition which causes pain all over the body): 3 people, 18.75%
Insomnia (sleeplessness): 3 people, 18.75%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 3 people, 18.75%
Allergic Rhinitis: 3 people, 18.75%
Osteopenia (a condition where bone mineral density is lower than normal): 3 people, 18.75%

* Approximation only. Some reports may have incomplete information.

Do you take Singulair and have Toxic encephalopathy?

- Check whether Toxic encephalopathy is associated with a drug or a condition
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously

Related studies:

Effectiveness of, long term effects of, and alternative drugs to Singulair:

Singulair (129,752 reports)

Browse all side effects of Singulair:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Browse all the drugs that are associated with Toxic encephalopathy:

Toxic encephalopathy (424 drugs)

Browse all the conditions that are associated with Toxic encephalopathy:

Toxic encephalopathy (615 conditions)

Related publications that referenced our studies

Jeong SY, Jeon SJ, Kim YR, Choi SS, Kwak HS, "A Rare Case of Viagra Induced Toxic Encephalopathy", Investigative Magnetic Resonance Imaging, 2016 Sep .
Das S, Mondal S, Dey JK, Bandyopadhyay S, Saha I, Tripathi SK, "A case of montelukast induced hypercholesterolemia, severe hypertriglyceridemia and pancreatitis", Journal of Young Pharmacists, 2013 Jun .
Jeong SY, Jeon SJ, Kim YR, Choi SS, Kwak HS, "A Rare Case of Viagra Induced Toxic Encephalopathy", Investigative Magnetic Resonance Imaging, 2016 Sep .
Das S, Mondal S, Dey JK, Bandyopadhyay S, Saha I, Tripathi SK, "A case of montelukast induced hypercholesterolemia, severe hypertriglyceridemia and pancreatitis", Journal of Young Pharmacists, 2013 Jun .

How the study uses the data?

The study uses data from the FDA. It is based on montelukast sodium (the active ingredients of Singulair) and Singulair (the brand name). Other drugs that have the same active ingredients (e.g. generic drugs) are not considered. Dosage of drugs is not considered in the study.

How to use the study?

DO NOT STOP MEDICATIONS without first consulting your doctor. If there are any serious or long term adverse effects discovered in the study, discuss the study with your doctor to ensure that proper medication management will be in place if applicable.

Who is eHealthMe?

With medical big data and proven AI/ML algorithms, eHealthMe provides a platform for everyone to run phase IV clinical trials. We study millions of patients and 5,000 more each day. Results of our real-world drug study have been referenced on 800+ peer-reviewed medical publications, including The Lancet, Mayo Clinic Proceedings, and Nature. Our analysis results are available to researchers, health care professionals, patients (testimonials), and software developers (open API).

WARNING, DISCLAIMER, USE FOR PUBLICATION

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on eHealthMe.com is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only. Our phase IV clinical studies alone cannot establish cause-effect relationship. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.