Methotrexate sodium and Polyarthritis - a phase IV clinical study of FDA data

Summary:

Polyarthritis is reported as a side effect among people who take Methotrexate sodium (methotrexate sodium), especially for people who are female, 60+ old, have been taking the drug for 1 - 6 months also take Enbrel, and have Juvenile rheumatoid arthritis.

The phase IV clinical study analyzes which people have Polyarthritis when taking Methotrexate sodium. It is created by eHealthMe based on reports of 96,366 people who have side effects when taking Methotrexate sodium from the FDA, and is updated regularly.

What is Methotrexate sodium?

Methotrexate sodium has active ingredients of methotrexate sodium. It is often used in rheumatoid arthritis. eHealthMe is studying from 97,680 Methotrexate sodium users. Check the latest studies of Methotrexate sodium.

What is Polyarthritis?

Polyarthritis (arthritis which involves 5 or more joints simultaneously) is found to be associated with 491 drugs and 576 conditions by eHealthMe. Check the latest studies of Polyarthritis.

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, 30, 2026

96,366 people reported to have side effects when taking Methotrexate sodium.
Among them, 242 people (0.25%) have Polyarthritis.

Could Methotrexate sodium cause Polyarthritis?

Among these 242 people:

How long have people been on Methotrexate sodium when they have Polyarthritis? *

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What is the gender of people who have Polyarthritis when taking Methotrexate sodium? *

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What is the age of people who have Polyarthritis when taking Methotrexate sodium? *

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* Approximation only. Some reports may have incomplete information.

Do you take Methotrexate sodium and have Polyarthritis?

- Check whether Polyarthritis 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 Methotrexate sodium:

Methotrexate sodium (97,680 reports)

Polyarthritis treatments and more:

Polyarthritis (13,132 reports)

How severe was Polyarthritis and when was it recovered:

Polyarthritis in Methotrexate sodium

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

Polyarthritis and drugs with ingredients of methotrexate sodium (1,809 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 Methotrexate sodium:

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 Polyarthritis:

Polyarthritis (491 drugs)

Browse all the conditions that are associated with Polyarthritis:

Polyarthritis (576 conditions)

Related publications that referenced our studies

Henien M, Carey B, Hullah E, Sproat C, Patel V, "methotrexate-associated osteonecrosis of the jaw: A report of two cases", Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology, 2017 Dec .
Henien M, Carey B, Hullah E, Sproat C, Patel V, "methotrexate-associated osteonecrosis of the jaw: A report of two cases", Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology, 2017 Dec .

How the study uses the data?

The study uses data from the FDA. It is based on methotrexate sodium (the active ingredients of Methotrexate sodium) and Methotrexate sodium (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.