Adcal 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 Adcal (calcium carbonate), especially for people who are female, 60+ old, also take Paracetamol, and have Hypothyroidism.

The phase IV clinical study analyzes which people have Atrial fibrillation/flutter when taking Adcal. It is created by eHealthMe based on reports of 4,800 people who have side effects when taking Adcal from the FDA, and is updated regularly.

What is Adcal?

Adcal has active ingredients of calcium carbonate. eHealthMe is studying from 4,844 Adcal users. Check the latest studies of Adcal.

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 May, 28, 2026

4,800 people reported to have side effects when taking Adcal.
Among them, 41 people (0.85%) have Atrial fibrillation/flutter.

Could Adcal cause Atrial fibrillation/flutter?

Among these 41 people:

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

female: 97.37 %
male: 2.63 %

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

What are other drugs people take besides Adcal? *

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

Drowsiness: 15 people, 36.59%
Constipation: 15 people, 36.59%
Peripheral Swelling: 14 people, 34.15%
Urosepsis (secondary infection that occurs when a urinary tract infection spreads to the bloodstream): 14 people, 34.15%
Back Pain: 14 people, 34.15%
Urinary Tract Infection: 13 people, 31.71%
High Blood Pressure: 11 people, 26.83%
Rash Macular (small, flat red spots): 10 people, 24.39%
High Blood Cholesterol: 10 people, 24.39%
Head Injury: 10 people, 24.39%

What are the existing conditions these people have? *

High Blood Cholesterol: 15 people, 36.59%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 15 people, 36.59%
Joint Pain: 10 people, 24.39%
Blood Pressure Abnormal: 10 people, 24.39%
Osteoporosis (bones weak and more likely to break): 9 people, 21.95%
Lower Respiratory Tract Infection: 9 people, 21.95%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 6 people, 14.63%
Macrocytosis (enlargement of red blood cells with near-constant haemoglobin concentration): 5 people, 12.20%
Multiple Myeloma (cancer of the plasma cells): 5 people, 12.20%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 5 people, 12.20%

* Approximation only. Some reports may have incomplete information.

Do you take Adcal 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 Adcal:

Adcal (4,844 reports)

Browse all side effects of Adcal:

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 calcium carbonate (the active ingredients of Adcal) and Adcal (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.