T3

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Triiodothyronine; T3 radioimmunoassay

The only risks of the test is those minor risks associated with having blood drawn.

Drugs that can increase T3 measurements include clofibrate, estrogens, methadone, and oral contraceptives.

Drugs that can decrease T3 measurements include anabolic steroids, androgens, antithyroid drugs (for example, propylthiouracil), lithium, phenytoin, and propranolol.

Review Date: 01/18/2006
Reviewed By: Nikheel S. Kolatkar, MD, Clinical and Research Fellow, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA. Review provided by VeriMed Healthcare Network.