Levoxyl 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 Levoxyl (levothyroxine sodium), especially for people who are female, 60+ old, have been taking the drug for 1 - 6 months also take Coumadin, and have High blood pressure.

The phase IV clinical study analyzes which people have Atrial fibrillation/flutter when taking Levoxyl. It is created by eHealthMe based on reports of 23,566 people who have side effects when taking Levoxyl from the FDA, and is updated regularly.

What is Levoxyl?

Levoxyl has active ingredients of levothyroxine sodium. It is often used in hypothyroidism. eHealthMe is studying from 25,178 Levoxyl users. Check the latest studies of Levoxyl.

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 2,364 drugs and 3,842 conditions by eHealthMe. Check the latest studies of Atrial fibrillation/flutter.

On Jul, 07, 2026

23,566 people reported to have side effects when taking Levoxyl.
Among them, 359 people (1.52%) have Atrial fibrillation/flutter.

Could Levoxyl cause Atrial fibrillation/flutter?

Among these 359 people:

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

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

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

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* Approximation only. Some reports may have incomplete information.

Do you take Levoxyl 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 Levoxyl:

Levoxyl (25,178 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 Levoxyl

Expand to all the drugs that have ingredients of levothyroxine sodium:

Atrial fibrillation/flutter and drugs with ingredients of levothyroxine sodium (8,420 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 Levoxyl:

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 (2,364 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 levothyroxine sodium (the active ingredients of Levoxyl) and Levoxyl (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.