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

Summary:

Flushing 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 2 - 5 years also take Vitamin C, and have Multiple sclerosis.

The phase IV clinical study analyzes which people have Flushing 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 Flushing?

Flushing (the warm, red condition of human skin) is found to be associated with 2,044 drugs and 2,892 conditions by eHealthMe. Check the latest studies of Flushing.



On Aug, 15, 2025

5,049 people reported to have side effects when taking Selenium.
Among them, 72 people (1.43%) have Flushing.

Could Selenium cause Flushing?

Among these 72 people:

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

  • < 1 month: 0.0 %
  • 1 - 6 months: 0.0 %
  • 6 - 12 months: 0.0 %
  • 1 - 2 years: 0.0 %
  • 2 - 5 years: 100 %
  • 5 - 10 years: 0.0 %
  • 10+ years: 0.0 %

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

  • female: 68.12 %
  • male: 31.88 %

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

  • 0-1: 0.0 %
  • 2-9: 0.0 %
  • 10-19: 0.0 %
  • 20-29: 0.0 %
  • 30-39: 8 %
  • 40-49: 14 %
  • 50-59: 26 %
  • 60+: 52 %

What are other drugs people take besides Selenium? *

  1. Vitamin C: 26 people, 36.11%
  2. Magnesium: 21 people, 29.17%
  3. Vitamin D3: 18 people, 25.00%
  4. Niaspan: 16 people, 22.22%
  5. Fish Oil: 15 people, 20.83%
  6. Synthroid: 15 people, 20.83%
  7. Vitamin D: 15 people, 20.83%
  8. Tecfidera: 11 people, 15.28%
  9. Calcium: 11 people, 15.28%
  10. Biotin: 11 people, 15.28%

What are other side effects people have besides Flushing? *

  1. Rashes (redness): 31 people, 43.06%
  2. Fatigue (feeling of tiredness): 25 people, 34.72%
  3. Headache (pain in head): 23 people, 31.94%
  4. Diarrhea: 23 people, 31.94%
  5. Stress And Anxiety: 20 people, 27.78%
  6. Itching: 19 people, 26.39%
  7. High Blood Pressure: 19 people, 26.39%
  8. Abdominal Pain: 18 people, 25.00%
  9. Blood Pressure Systolic Increased: 18 people, 25.00%
  10. Head Injury: 17 people, 23.61%

What are the existing conditions these people have? *

  1. Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 13 people, 18.06%
  2. Thyroid Diseases: 10 people, 13.89%
  3. High Blood Cholesterol: 8 people, 11.11%
  4. Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 8 people, 11.11%
  5. Neuroendocrine Tumor: 7 people, 9.72%
  6. High Density Lipoprotein Decreased: 6 people, 8.33%
  7. Asthma: 6 people, 8.33%
  8. Low Density Lipoprotein Increased (cholesterol increased in blood): 5 people, 6.94%
  9. Primary Pulmonary Hypertension (primary high blood pressure that affects the arteries in the lungs and the right side of your heart): 4 people, 5.56%
  10. Sleep Disorder: 3 people, 4.17%

* Approximation only. Some reports may have incomplete information.

Do you take Selenium and have Flushing?

- Check whether Flushing 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:

Flushing treatments and more:

How severe was Flushing and when was it recovered:

Expand to all the drugs that have ingredients of selenium:

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 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 Flushing:

Browse all the conditions that are associated with Flushing:

Drugs similar to Selenium and Flushing :


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.



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