Selenium and Overactive thyroid - a phase IV clinical study of FDA data

Summary:

Overactive thyroid is reported as a side effect among people who take Selenium (selenium), especially for people who are 60+ old, have been taking the drug for 1 - 6 months also take Vitamin C, and have Eyes - bulging.

The phase IV clinical study analyzes which people have Overactive thyroid 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 5,314 Selenium users. Check the latest studies of Selenium.

What is Overactive thyroid?

Overactive thyroid (extra secretions from thyroid) is found to be associated with 1,511 drugs and 1,428 conditions by eHealthMe. Check the latest studies of Overactive thyroid.

On May, 24, 2026

5,049 people reported to have side effects when taking Selenium.
Among them, 11 people (0.22%) have Overactive thyroid.

Could Selenium cause Overactive thyroid?

Among these 11 people:

How long have people been on Selenium when they have Overactive thyroid? *

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

What are other drugs people take besides Selenium? *

What are other side effects people have besides Overactive thyroid? *

Diarrhea: 4 people, 36.36%
Weakness: 3 people, 27.27%
Blood Pressure Systolic Increased: 3 people, 27.27%
Gait Disturbance: 3 people, 27.27%
Weight Decreased: 3 people, 27.27%
Dry Skin: 3 people, 27.27%
Nosebleed (bleeding from nose): 2 people, 18.18%
Photophobia (extreme sensitivity to light): 2 people, 18.18%
Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect): 2 people, 18.18%
Pain: 2 people, 18.18%

What are the existing conditions these people have? *

Abdominal Pain: 2 people, 18.18%
Blepharitis (chronic inflammation of the eyelid): 2 people, 18.18%
Eyelid Oedema (eyelids are swollen and contain excessive fluid): 2 people, 18.18%
Eye Pain: 2 people, 18.18%
Hyperglycemia (high blood sugar): 2 people, 18.18%
Eye Inflammation: 2 people, 18.18%
Endocrine Ophthalmopathy (increased water content of retroocular orbital tissues; associated with thyroid disease, usually hyperthyroidism): 2 people, 18.18%
Dry Eyes (lack of adequate tears): 2 people, 18.18%
Ocular Hyperaemia (an abnormally large amount of blood in eye): 2 people, 18.18%
Eyes - Bulging (swelling of eyes): 2 people, 18.18%

* Approximation only. Some reports may have incomplete information.

Do you take Selenium and have Overactive thyroid?

- Check whether Overactive thyroid 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 (5,314 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 Overactive thyroid:

Overactive thyroid (1,511 drugs)

Browse all the conditions that are associated with Overactive thyroid:

Overactive thyroid (1,428 conditions)

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.