Valtrex and Electroencephalogram abnormal - a phase IV clinical study of FDA data

Summary:

Electroencephalogram abnormal is reported as a side effect among people who take Valtrex (valacyclovir hydrochloride), especially for people who are female, 60+ old, have been taking the drug for < 1 month also take Acyclovir, and have Hyperlipidaemia.

The phase IV clinical study analyzes which people have Electroencephalogram abnormal when taking Valtrex. It is created by eHealthMe based on reports of 38,014 people who have side effects when taking Valtrex from the FDA, and is updated regularly.

What is Valtrex?

Valtrex has active ingredients of valacyclovir hydrochloride. It is often used in genital herpes. eHealthMe is studying from 39,999 Valtrex users. Check the latest studies of Valtrex.

What is Electroencephalogram abnormal?

Electroencephalogram abnormal is found to be associated with 598 drugs and 750 conditions by eHealthMe. Check the latest studies of Electroencephalogram abnormal.

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 Aug, 29, 2026

38,014 people reported to have side effects when taking Valtrex.
Among them, 18 people (0.05%) have Electroencephalogram abnormal.

Could Valtrex cause Electroencephalogram abnormal?

Among these 18 people:

How long have people been on Valtrex when they have Electroencephalogram abnormal? *

What is the gender of people who have Electroencephalogram abnormal when taking Valtrex? *

female: 64.71 %
male: 35.29 %

What is the age of people who have Electroencephalogram abnormal when taking Valtrex? *

What are other drugs people take besides Valtrex? *

What are other side effects people have besides Electroencephalogram abnormal? *

Confusion: 7 people, 38.89%
Depressed Level Of Consciousness: 7 people, 38.89%
Speech Disorder: 6 people, 33.33%
Myoclonus (a brief, involuntary twitching of a muscle or a group of muscles): 6 people, 33.33%
Acute Kidney Failure: 5 people, 27.78%
Agitation (state of anxiety or nervous excitement): 5 people, 27.78%
Blood Urea Increased: 5 people, 27.78%
Blood Creatinine Increased: 5 people, 27.78%
Grand Mal Convulsion (a type of generalized seizure that affects the entire brain): 4 people, 22.22%
Encephalopathy (functioning of the brain is affected by some agent or condition): 4 people, 22.22%

What are the existing conditions these people have? *

Sarcoidosis (an inflammatory disease that affects multiple organs in the body, but mostly the lungs and lymph glands): 2 people, 11.11%
Hyperlipidaemia (presence of excess lipids in the blood): 2 people, 11.11%
Osteoporosis (bones weak and more likely to break): 1 person, 5.56%
Neuralgia (pain in one or more nerves): 1 person, 5.56%
High Blood Pressure: 1 person, 5.56%
Dizziness: 1 person, 5.56%
Diabetes: 1 person, 5.56%
Acute Myeloid Leukaemia (acute cancer in which the bone marrow makes abnormal myeloblasts): 1 person, 5.56%

* Approximation only. Some reports may have incomplete information.

Do you take Valtrex and have Electroencephalogram abnormal?

- Check whether Electroencephalogram abnormal is associated with a drug or a condition
- Predict drug outcomes for up to one year with AI
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Related studies:

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

Valtrex (39,999 reports)

Browse all side effects of Valtrex:

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 Electroencephalogram abnormal:

Electroencephalogram abnormal (598 drugs)

Browse all the conditions that are associated with Electroencephalogram abnormal:

Electroencephalogram abnormal (750 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on valacyclovir hydrochloride (the active ingredients of Valtrex) and Valtrex (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.