Valacyclovir and Cd4 lymphocytes decreased - a phase IV clinical study of FDA data

Summary:

Cd4 lymphocytes decreased is reported as a side effect among people who take Valacyclovir (valacyclovir hydrochloride), especially for people who are female, 60+ old, have been taking the drug for 1 - 6 months also take Zofran, and have Multiple sclerosis.

The phase IV clinical study analyzes which people have Cd4 lymphocytes decreased when taking Valacyclovir. It is created by eHealthMe based on reports of 41,259 people who have side effects when taking Valacyclovir from the FDA, and is updated regularly.

What is Valacyclovir?

Valacyclovir has active ingredients of valacyclovir hydrochloride. It is often used in genital herpes. eHealthMe is studying from 42,107 Valacyclovir users. Check the latest studies of Valacyclovir.

What is Cd4 lymphocytes decreased?

Cd4 lymphocytes decreased is found to be associated with 249 drugs and 343 conditions by eHealthMe. Check the latest studies of Cd4 lymphocytes decreased.

On Jul, 14, 2026

41,259 people reported to have side effects when taking Valacyclovir.
Among them, 21 people (0.05%) have Cd4 lymphocytes decreased.

Could Valacyclovir cause Cd4 lymphocytes decreased?

Among these 21 people:

How long have people been on Valacyclovir when they have Cd4 lymphocytes decreased? *

What is the gender of people who have Cd4 lymphocytes decreased when taking Valacyclovir? *

female: 77.78 %
male: 22.22 %

What is the age of people who have Cd4 lymphocytes decreased when taking Valacyclovir? *

What are other drugs people take besides Valacyclovir? *

What are other side effects people have besides Cd4 lymphocytes decreased? *

Fatigue (feeling of tiredness): 9 people, 42.86%
Pain: 8 people, 38.10%
Rashes (redness): 8 people, 38.10%
Insomnia (sleeplessness): 7 people, 33.33%
High Blood Pressure: 7 people, 33.33%
Weakness: 7 people, 33.33%
Fever: 7 people, 33.33%
Thrombocytopenia (decrease of platelets in blood): 6 people, 28.57%
Protein Urine Present: 6 people, 28.57%
Itching: 6 people, 28.57%

What are the existing conditions these people have? *

Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 9 people, 42.86%
Multiple Myeloma (cancer of the plasma cells): 4 people, 19.05%
Immunodeficiency Disorders: 3 people, 14.29%
Constipation: 3 people, 14.29%
Depression: 3 people, 14.29%
Micturition Disorder (disease of passing urine): 3 people, 14.29%
Aseptic Necrosis (the death of bone tissue due to a lack of blood supply): 3 people, 14.29%
Seasonal Allergy (allergic condition due to certain season): 3 people, 14.29%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 2 people, 9.52%
Hiv Infection: 2 people, 9.52%

* Approximation only. Some reports may have incomplete information.

Do you take Valacyclovir and have Cd4 lymphocytes decreased?

- Check whether Cd4 lymphocytes decreased is associated with a drug or a condition
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Related studies:

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

Valacyclovir (42,107 reports)

Browse all side effects of Valacyclovir:

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 Cd4 lymphocytes decreased:

Cd4 lymphocytes decreased (249 drugs)

Browse all the conditions that are associated with Cd4 lymphocytes decreased:

Cd4 lymphocytes decreased (343 conditions)

How the study uses the data?

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