Contact Us  |  Search: 
Printer Friendly VersionEmail A FriendAdd ThisIncrease Text SizeDecrease Text Size

Factitious hyperthyroidism

 

Definition

Factitious hyperthyroidism is higher than normal thyroid hormone levels that occur from taking too much thyroid hormone medication.

Alternative Names

Factitious thyrotoxicosis; thyrotoxicosis factitia; thyrotoxicosis medicamentosa

Causes

The thyroid gland produces the hormones thyroxine (T4) and triiodothyronine (T3). In most cases of hyperthyroidism, the thyroid gland itself produces too much of these hormones.

However, hyperthyroidism can also be caused by taking too much thyroid hormone medication for hypothyroidism. This is called factitious hyperthyroidism. When this occurs because the prescribed dose of hormone medication is too high, it is called iatrogenic, or "doctor-induced," hyperthyroidism.

Factitious hyperthyroidism can also occur when a patient intentionally takes too much thyroid hormone, such as in people:

  • Who have psychiatric disorders such as Munchausen syndrome
  • Who are trying to lose weight
  • Who want to get compensation from the insurance company

Children may take thyroid hormone pills accidentally.

In rare cases, factitious hyperthyroidism is caused by eating meat contaminated with thyroid gland tissue.

Symptoms

The symptoms of factitious hyperthyroidism are the same as those of hyperthyroidism caused by the thyroid gland, with these exceptions:

  • There is no goiter. The thyroid gland is usually small.
  • The eyes do not bulge, as they do in Graves disease (the most common type of hyperthyroidism).
  • The skin over the shins does not thicken, as it occasionally does with people who have Graves disease.
Signs and tests

The following test results may indicate factitious hyperthyroidism:

Support Groups

Expectations (prognosis)

Factitious hyperthyroidism will clear up on its own when you stop taking or lower the dose of thyroid hormone.

Calling your health care provider

Contact your health care provider if you experience any of the symptoms of hyperthyroidism.

Complications

When factitious hyperthyroidism lasts a long time, patients are at risk for the same complications of untreated or improperly treated hyperthyroidism caused by the thyroid gland.

These complications include:

Treatments

You must stop taking thyroid hormone. If it is medically necessary, the dose must be reduced.

You should be re-evaluated in 2 - 4 weeks to be sure that the signs and symptoms of hyperthyroidism are gone. This also helps to confirm the diagnosis.

People with Munchausen syndrome will need psychiatric treatment and follow-up.

Prevention

Thyroid hormone should be taken only by prescription and under the supervision of a licensed physician.


Review Date: 4/19/2010
Reviewed By: Ari S. Eckman, MD, Division of Endocrinology and Metabolism, Johns Hopkins School of Medicine, Baltimore, MD. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org). URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics and subscribes to the principles of the Health on the Net Foundation (www.hon.ch).
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2009 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
MAIMONIDES
MEDICAL CENTER


Home Page
Why Choose Us
Donations
Website Terms of Use
PATIENT
INFORMATION


Visitor & Patient Info
We Speak Your Language
Patient Privacy
Contact Us
KEY
INFORMATION


Find a Physician
Medical Services
Maimonides In the News
Directions & Parking
FOR HEALTH
PROFESSIONALS


Medical Education
Career Opportunities
Nurses & Physicians
Staff Intranet Access

Maimonides Medical Center    |    4802 Tenth Avenue    |    Brooklyn, NY 11219    |    718.283.6000