Acetaminophen and Myelitis - a phase IV clinical study of FDA data

Summary:

Myelitis is reported as a side effect among people who take Acetaminophen (acetaminophen), especially for people who are female, 50-59 old, also take Benadryl, and have Relapsing-remitting multiple sclerosis.

The phase IV clinical study analyzes which people have Myelitis when taking Acetaminophen. It is created by eHealthMe based on reports of 181,086 people who have side effects when taking Acetaminophen from the FDA, and is updated regularly.

What is Acetaminophen?

Acetaminophen has active ingredients of acetaminophen. It is often used in pain. eHealthMe is studying from 183,078 Acetaminophen users. Check the latest studies of Acetaminophen.

What is Myelitis?

Myelitis (infection or the inflammation of white matter or gray matter of spinal cord which is a part of central nervous system) is found to be associated with 181 drugs and 345 conditions by eHealthMe. Check the latest studies of Myelitis.

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, 31, 2026

181,086 people reported to have side effects when taking Acetaminophen.
Among them, 29 people (0.02%) have Myelitis.

Among these 29 people:

What is the gender of people who have Myelitis when taking Acetaminophen? *

female: 59.26 %
male: 40.74 %

What is the age of people who have Myelitis when taking Acetaminophen? *

What are other drugs people take besides Acetaminophen? *

What are other side effects people have besides Myelitis? *

Nausea (feeling of having an urge to vomit): 8 people, 27.59%
Dizziness: 6 people, 20.69%
Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 5 people, 17.24%
Fatigue (feeling of tiredness): 5 people, 17.24%
Breast Pain: 5 people, 17.24%
Pain Of Skin: 5 people, 17.24%
Balance Disorder: 5 people, 17.24%
Malaise (a feeling of general discomfort or uneasiness): 5 people, 17.24%
Tenderness (pain or discomfort when an affected area is touched): 4 people, 13.79%
Syncope Vasovagal (malfunction in the parts of the nervous system leads to consciousness with an inability to maintain postural tone): 4 people, 13.79%

What are the existing conditions these people have? *

Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 5 people, 17.24%
Fever: 4 people, 13.79%
High Blood Pressure: 4 people, 13.79%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 3 people, 10.34%
Insomnia (sleeplessness): 3 people, 10.34%
Multiple Myeloma (cancer of the plasma cells): 3 people, 10.34%
Dyslipidaemia (abnormal amount of lipids): 2 people, 6.90%
Chronic Lymphocytic Leukaemia (cancer in which the bone marrow makes too many lymphocytes (a type of white blood cell)): 2 people, 6.90%
Indigestion: 2 people, 6.90%
Local Anaesthesia: 2 people, 6.90%

* Approximation only. Some reports may have incomplete information.

Do you take Acetaminophen and have Myelitis?

- Check whether Myelitis 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 Acetaminophen:

Acetaminophen (183,078 reports)

Myelitis treatments and more:

Myelitis (2,018 reports)

Browse all side effects of Acetaminophen:

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 Myelitis:

Myelitis (181 drugs)

Browse all the conditions that are associated with Myelitis:

Myelitis (345 conditions)

How the study uses the data?

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