Thyroid Hormone Tests: What Affects The Test
Content provided by Healthwise
What Affects the Test
Reasons you may not be able to have the test or why the results may not be helpful include:
- Taking certain medicines, such as:
- Corticosteroids, estrogen, progesterone, or birth control pills.
- Blood-thinning medicines such as aspirin, heparin, or warfarin (Coumadin).
- Antiseizure medicines such as Dilantin or Tegretol.
- Heart medicines such as amiodarone or propranolol.
- Lithium.
- Having recently had an X-ray test that uses contrast material.
- Being pregnant.
| Last updated: | December 03, 2007 |
|---|---|
| Author: | Caroline Rea, RN, BS, MS |
| Reviewed By: | Caroline S. Rhoads, MD - Internal Medicine, David C.W. Lau, MD, PhD, FRCPC - Endocrinology & Metabolism |
| Editors: | Maria G. Essig, MS, ELS, Pat Truman, MATC |
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