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Medications and Drugs

What Kind of Doctor Do I Need?

Brand Names:

Generic Name: selenium (Pronunciation: se LEE nee um)

What is selenium ()?

Selenium is mineral that is found in soil and occurs naturally in certain foods (such as whole grains, Brazil nuts, sunflower seeds, and seafood). Selenium is not produced in the body, but it is needed for proper thyroid and immune system function.

Selenium is used to treat or prevent selenium deficiency.

Selenium has been used in alternative medicine as an aid to treat Hashimoto's thyroiditis (an autoimmune disorder of the thyroid), and to treat high cholesterol.

Not all uses for selenium have been approved by the FDA. Selenium should not be used in place of medication prescribed for you by your doctor.

Selenium may also be used for purposes not listed in this product guide.

What are the possible side effects of selenium ()?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Long term use of high selenium doses can lead to dangerous side effects. Stop taking selenium and call your doctor at once if you have:

  • nausea, vomiting;
  • lack of energy, feeling irritable or very tired
  • hair loss, mild rash, brittle or painful fingernails, or white streaks on the nails;
  • tremors, feeling light-headed;
  • muscle tenderness;
  • flushing (warmth, redness, or tingly feeling);
  • metallic taste, bad breath, strong body odor; or
  • easy bruising or bleeding.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about selenium ()?

High doses or long-term use of selenium can lead to serious medical problems or death. Do not use more of this product than is recommended on the label.

Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.



Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Pill Identifier Tool

Need help identifying pills and medications?
Use the pill finder tool on RxList.

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Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Pill Identifier Tool

Need help identifying pills and medications?
Use the pill finder tool on RxList.



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