Valtrex and Csf cell count increased - a phase IV clinical study of FDA data

Summary:

Csf cell count increased is reported as a side effect among people who take Valtrex (valacyclovir hydrochloride), especially for people who are male, 60+ old, have been taking the drug for < 1 month also take Zovirax, and have Fever.

The phase IV clinical study analyzes which people have Csf cell count increased 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 Csf cell count increased?

Csf cell count increased is found to be associated with 21 drugs and 125 conditions by eHealthMe. Check the latest studies of Csf cell count increased.

On Jul, 27, 2026

38,014 people reported to have side effects when taking Valtrex.
Among them, 18 people (0.05%) have Csf cell count increased.

Could Valtrex cause Csf cell count increased?

Among these 18 people:

How long have people been on Valtrex when they have Csf cell count increased? *

What is the gender of people who have Csf cell count increased when taking Valtrex? *

female: 38.89 %
male: 61.11 %

What is the age of people who have Csf cell count increased when taking Valtrex? *

What are other drugs people take besides Valtrex? *

What are other side effects people have besides Csf cell count increased? *

Headache (pain in head): 8 people, 44.44%
Altered State Of Consciousness (altered state of mind): 8 people, 44.44%
Csf Protein Increased: 7 people, 38.89%
Encephalitis (inflammation of the brain): 7 people, 38.89%
Toxic Encephalopathy (a degenerative neurologic disorder caused by exposure to toxic substances): 6 people, 33.33%
Dizziness: 6 people, 33.33%
Hydrocephalus (water on the brain): 5 people, 27.78%
Fever: 5 people, 27.78%
Meningitis Fungal (fungal inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges): 5 people, 27.78%
Ear Disorder: 5 people, 27.78%

What are the existing conditions these people have? *

Fever: 6 people, 33.33%
Stomatitis (inflammation of mucous membrane of mouth): 5 people, 27.78%
Acute Lymphocytic Leukemia (All) (cancer of the white blood cells characterized by excess lymphoblasts): 5 people, 27.78%
Blood Bilirubin Increased: 5 people, 27.78%
Eating Disorder: 5 people, 27.78%
Abdominal Discomfort: 5 people, 27.78%
Nasopharyngitis (inflammation of the nasopharynx): 5 people, 27.78%
Oral Pain: 5 people, 27.78%
Pain: 3 people, 16.67%
Mouth Ulcers: 2 people, 11.11%

* Approximation only. Some reports may have incomplete information.

Do you take Valtrex and have Csf cell count increased?

- Check whether Csf cell count increased is associated with a drug or a condition
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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 Csf cell count increased:

Csf cell count increased (21 drugs)

Browse all the conditions that are associated with Csf cell count increased:

Csf cell count increased (125 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.