Omeprazole and Hyperammonaemic encephalopathy - a phase IV clinical study of FDA data

Summary:

Hyperammonaemic encephalopathy is reported as a side effect among people who take Omeprazole (omeprazole), especially for people who are female, 60+ old, also take Lactulose, and have High blood pressure.

The phase IV clinical study analyzes which people have Hyperammonaemic encephalopathy when taking Omeprazole. It is created by eHealthMe based on reports of 400,982 people who have side effects when taking Omeprazole from the FDA, and is updated regularly.

What is Omeprazole?

Omeprazole has active ingredients of omeprazole. It is often used in gastroesophageal reflux disease. eHealthMe is studying from 410,631 Omeprazole users. Check the latest studies of Omeprazole.

What is Hyperammonaemic encephalopathy?

Hyperammonaemic encephalopathy (excess of ammonia in the blood, disorder or disease of the brain) is found to be associated with 116 drugs and 173 conditions by eHealthMe. Check the latest studies of Hyperammonaemic encephalopathy.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Sep, 01, 2026

400,982 people reported to have side effects when taking Omeprazole.
Among them, 57 people (0.01%) have Hyperammonaemic encephalopathy.

Could Omeprazole cause Hyperammonaemic encephalopathy?

Among these 57 people:

What is the gender of people who have Hyperammonaemic encephalopathy when taking Omeprazole? *

female: 66.04 %
male: 33.96 %

What is the age of people who have Hyperammonaemic encephalopathy when taking Omeprazole? *

What are other drugs people take besides Omeprazole? *

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

Speech Impairment (Adult) (inability to speak (adult)): 7 people, 12.28%
Confusional State: 7 people, 12.28%
Hepatic Function Abnormal: 5 people, 8.77%
Mobility Decreased (ability to move is reduced): 5 people, 8.77%
Metabolic Acidosis (body produces too much acid, or when the kidneys are not removing enough acid from the body): 5 people, 8.77%
Partial Seizures (seizures which affect only a part of the brain at onset): 5 people, 8.77%
Respiratory Alkalosis (elevated blood ph due to excess breathing): 5 people, 8.77%
Confusion: 5 people, 8.77%
Consciousness - Decreased: 5 people, 8.77%
Ammonia Increased: 5 people, 8.77%

What are the existing conditions these people have? *

High Blood Pressure: 19 people, 33.33%
Urinary Tract Infection: 18 people, 31.58%
Stress And Anxiety: 17 people, 29.82%
Sleep Disorder: 17 people, 29.82%
Type 2 Diabetes: 17 people, 29.82%
Non-Hodgkin's Lymphoma (malignant (cancer) cells form in the lymph system): 6 people, 10.53%
Seizures (abnormal excessive or synchronous neuronal activity in the brain): 3 people, 5.26%
Epilepsy (common and diverse set of chronic neurological disorders characterized by seizures): 3 people, 5.26%
Depression: 2 people, 3.51%
Hepatocellular Carcinoma (liver cancer): 2 people, 3.51%

* Approximation only. Some reports may have incomplete information.

Do you take Omeprazole and have Hyperammonaemic encephalopathy?

- Check whether Hyperammonaemic 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 Omeprazole:

Omeprazole (410,631 reports)

Browse all side effects of Omeprazole:

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 Hyperammonaemic encephalopathy:

Hyperammonaemic encephalopathy (116 drugs)

Browse all the conditions that are associated with Hyperammonaemic encephalopathy:

Hyperammonaemic encephalopathy (173 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on omeprazole (the active ingredients of Omeprazole) and Omeprazole (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.