Thyroid-Stimulating Hormone (TSH): What Affects The Test
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What Affects the Test
Reasons you may not be able to have the test or why the results may not be helpful include:
- Taking medicine, such as corticosteroids, levodopa, heparin, dopamine, lithium (such as Carbolith, Duralith, or Lithane), methimazole (Tapazole), and propylthiouracil.
- Having had a recent X-ray with iodine dye or test using radioactive materials.
- Having severe stress or a long-term (chronic) illness.
- Pregnancy during the first trimester.
| Last updated: | July 26, 2006 |
|---|---|
| Author: | Sydney Youngerman-Cole, RN, BSN, RNC |
| Reviewed By: | Caroline S. Rhoads, MD - Internal Medicine, Matthew I. Kim, MD - Endocrinology & Metabolism |
| Editors: | Susan Van Houten, RN, BSN, MBA, Tracy Landauer |
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