Valacyclovir hydrochloride and Atrial fibrillation/flutter - a phase IV clinical study of FDA data

Summary:

Atrial fibrillation/flutter is reported as a side effect among people who take Valacyclovir hydrochloride (valacyclovir hydrochloride), especially for people who are male, 60+ old, have been taking the drug for < 1 month also take Dexamethasone, and have Multiple myeloma.

The phase IV clinical study analyzes which people have Atrial fibrillation/flutter when taking Valacyclovir hydrochloride. It is created by eHealthMe based on reports of 12,770 people who have side effects when taking Valacyclovir hydrochloride from the FDA, and is updated regularly.

What is Valacyclovir hydrochloride?

Valacyclovir hydrochloride has active ingredients of valacyclovir hydrochloride. It is often used in herpes zoster. eHealthMe is studying from 12,929 Valacyclovir hydrochloride users. Check the latest studies of Valacyclovir hydrochloride.

What is Atrial fibrillation/flutter?

Atrial fibrillation/flutter (atrial fibrillation and flutter are abnormal heart rhythms in which the atria, or upper chambers of the heart, are out of sync with the ventricles) is found to be associated with 2,362 drugs and 3,842 conditions by eHealthMe. Check the latest studies of Atrial fibrillation/flutter.

On Jul, 25, 2026

12,770 people reported to have side effects when taking Valacyclovir hydrochloride.
Among them, 161 people (1.26%) have Atrial fibrillation/flutter.

Could Valacyclovir hydrochloride cause Atrial fibrillation/flutter?

Among these 161 people:

How long have people been on Valacyclovir hydrochloride when they have Atrial fibrillation/flutter? *

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What is the gender of people who have Atrial fibrillation/flutter when taking Valacyclovir hydrochloride? *

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What is the age of people who have Atrial fibrillation/flutter when taking Valacyclovir hydrochloride? *

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* Approximation only. Some reports may have incomplete information.

Do you take Valacyclovir hydrochloride and have Atrial fibrillation/flutter?

- Check whether Atrial fibrillation/flutter 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 Valacyclovir hydrochloride:

Valacyclovir hydrochloride (12,929 reports)

Atrial fibrillation/flutter treatments and more:

Atrial fibrillation/flutter (349,226 reports)

How severe was Atrial fibrillation/flutter and when was it recovered:

Atrial fibrillation/flutter in Valacyclovir hydrochloride

Expand to all the drugs that have ingredients of valacyclovir hydrochloride:

Atrial fibrillation/flutter and drugs with ingredients of valacyclovir hydrochloride (928 reports)

Sub-studies by gender and age:

Female: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Male: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Browse all side effects of Valacyclovir hydrochloride:

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 Atrial fibrillation/flutter:

Atrial fibrillation/flutter (2,362 drugs)

Browse all the conditions that are associated with Atrial fibrillation/flutter:

Atrial fibrillation/flutter (3,842 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 hydrochloride) and Valacyclovir hydrochloride (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.