Tylenol and Hypocalcaemia - a phase IV clinical study of FDA data

Summary:

Hypocalcaemia is reported as a side effect among people who take Tylenol (acetaminophen), especially for people who are female, 60+ old, have been taking the drug for < 1 month also take Zofran, and have Multiple myeloma.

The phase IV clinical study analyzes which people have Hypocalcaemia when taking Tylenol. It is created by eHealthMe based on reports of 217,809 people who have side effects when taking Tylenol from the FDA, and is updated regularly.

What is Tylenol?

Tylenol has active ingredients of acetaminophen. It is often used in pain. eHealthMe is studying from 222,310 Tylenol users. Check the latest studies of Tylenol.

What is Hypocalcaemia?

Hypocalcaemia (levels of calcium in blood serum are abnormally low) is found to be associated with 1,196 drugs and 1,302 conditions by eHealthMe. Check the latest studies of Hypocalcaemia.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Aug, 22, 2026

217,809 people reported to have side effects when taking Tylenol.
Among them, 228 people (0.1%) have Hypocalcaemia.

Among these 228 people:

* Approximation only. Some reports may have incomplete information.

Do you take Tylenol and have Hypocalcaemia?

- Check whether Hypocalcaemia 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 Tylenol:

Tylenol (222,310 reports)

Hypocalcaemia treatments and more:

Hypocalcaemia (26,346 reports)

How severe was Hypocalcaemia and when was it recovered:

Hypocalcaemia in Tylenol

Expand to all the drugs that have ingredients of acetaminophen:

Hypocalcaemia and drugs with ingredients of acetaminophen (891 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 Tylenol:

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 Hypocalcaemia:

Hypocalcaemia (1,196 drugs)

Browse all the conditions that are associated with Hypocalcaemia:

Hypocalcaemia (1,302 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on acetaminophen (the active ingredients of Tylenol) and Tylenol (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.