Selenium and Tendonitis - a phase IV clinical study of FDA data

Summary:

Tendonitis is reported as a side effect among people who take Selenium (selenium), especially for people who are female, 60+ old, have been taking the drug for 1 - 2 years also take Vitamin C, and have Narcolepsy.

The phase IV clinical study analyzes which people have Tendonitis when taking Selenium. It is created by eHealthMe based on reports of 5,049 people who have side effects when taking Selenium from the FDA, and is updated regularly.

What is Selenium?

Selenium has active ingredients of selenium. It is often used in vitamin supplementation. eHealthMe is studying from 5,312 Selenium users. Check the latest studies of Selenium.

What is Tendonitis?

Tendonitis (a condition that causes pain and swelling of tendons) is found to be associated with 1,116 drugs and 1,263 conditions by eHealthMe. Check the latest studies of Tendonitis.

On Oct, 11, 2025

5,049 people reported to have side effects when taking Selenium.
Among them, 32 people (0.63%) have Tendonitis.

Among these 32 people:

How long have people been on Selenium when they have Tendonitis? *

What is the gender of people who have Tendonitis when taking Selenium? *

female: 78.12 %
male: 21.88 %

What is the age of people who have Tendonitis when taking Selenium? *

What are other drugs people take besides Selenium? *

What are other side effects people have besides Tendonitis? *

Headache (pain in head): 15 people, 46.88%
Back Pain: 13 people, 40.62%
Scoliosis (a medical condition in which a person's spine is curved from side to side): 12 people, 37.50%
Diarrhea: 12 people, 37.50%
Stress And Anxiety: 12 people, 37.50%
Spinal Osteoarthritis (joint cartilage loss in spine): 11 people, 34.38%
Nausea (feeling of having an urge to vomit): 11 people, 34.38%
Fatigue (feeling of tiredness): 10 people, 31.25%
Pain: 10 people, 31.25%
Depression: 10 people, 31.25%

What are the existing conditions these people have? *

Fibromyalgia (a long-term condition which causes pain all over the body): 7 people, 21.88%
Pain: 7 people, 21.88%
Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 7 people, 21.88%
Immunodeficiency Common Variable: 6 people, 18.75%
Osteoporosis (bones weak and more likely to break): 4 people, 12.50%
Diabetes: 3 people, 9.38%
High Blood Cholesterol: 3 people, 9.38%
Ill-Defined Disorder: 2 people, 6.25%
Breast Cancer Metastatic: 2 people, 6.25%
Rosacea (a skin condition that causes facial redness): 2 people, 6.25%

* Approximation only. Some reports may have incomplete information.

Do you take Selenium and have Tendonitis?

- Check whether Tendonitis 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 Selenium:

Selenium (5,312 reports)

Tendonitis treatments and more:

Tendonitis (23,482 reports)

Browse all side effects of Selenium:

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 Tendonitis:

Tendonitis (1,116 drugs)

Browse all the conditions that are associated with Tendonitis:

Tendonitis (1,263 conditions)

Drugs similar to Selenium and Tendonitis :

How the study uses the data?

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