Cinnamon 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 Cinnamon (cassia cinnamon), especially for people who are female, 60+ old, also take Fish Oil, and have Multiple myeloma.

The phase IV clinical study analyzes which people have Atrial fibrillation/flutter when taking Cinnamon. It is created by eHealthMe based on reports of 3,898 people who have side effects when taking Cinnamon from the FDA, and is updated regularly.

What is Cinnamon?

Cinnamon has active ingredients of cassia cinnamon. It is often used in diabetes. eHealthMe is studying from 4,110 Cinnamon users. Check the latest studies of Cinnamon.

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 2,365 drugs and 3,840 conditions by eHealthMe. Check the latest studies of Atrial fibrillation/flutter.

On May, 24, 2026

3,898 people reported to have side effects when taking Cinnamon.
Among them, 56 people (1.44%) have Atrial fibrillation/flutter.

Could Cinnamon cause Atrial fibrillation/flutter?

Among these 56 people:

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

female: 73.58 %
male: 26.42 %

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

What are other drugs people take besides Cinnamon? *

What are other side effects people have besides Atrial fibrillation/flutter? *

Pneumonia: 15 people, 26.79%
Urinary Tract Infection: 8 people, 14.29%
Heart Attack: 6 people, 10.71%
Cardiac Disorder: 6 people, 10.71%
Joint Pain: 6 people, 10.71%
Fatigue (feeling of tiredness): 6 people, 10.71%
Staphylococcal Infection (an infection with staphylococcus bacteria): 6 people, 10.71%
Heart Palpitations (feelings or sensations that your heart is pounding or racing): 6 people, 10.71%
Headache (pain in head): 6 people, 10.71%
Pacemaker Generated Arrhythmia: 5 people, 8.93%

What are the existing conditions these people have? *

Hypersensitivity: 9 people, 16.07%
Multiple Myeloma (cancer of the plasma cells): 9 people, 16.07%
Pain: 8 people, 14.29%
High Blood Pressure: 8 people, 14.29%
High Blood Cholesterol: 7 people, 12.50%
Psoriasis (immune-mediated disease that affects the skin): 6 people, 10.71%
Cardiac Disorder: 5 people, 8.93%
Immunodeficiency Common Variable: 4 people, 7.14%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 4 people, 7.14%
Thyroid Diseases: 4 people, 7.14%

* Approximation only. Some reports may have incomplete information.

Do you take Cinnamon 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 Cinnamon:

Cinnamon (4,110 reports)

Browse all side effects of Cinnamon:

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 (2,365 drugs)

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

Atrial fibrillation/flutter (3,840 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on cassia cinnamon (the active ingredients of Cinnamon) and Cinnamon (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.