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Causes of high and low triiodothyronine
Medical expert of the article
Last reviewed: 06.07.2025
Diseases and conditions in which the concentration of triiodothyronine changesin blood serum
Increased concentration |
Decreased concentration |
Thyrotoxicosis Iodine deficiency Condition after treatment with radioactive iodine preparations Endemic goiter Pendred syndrome Use of estrogens, oral contraceptives, methadone, heroin |
Postoperative conditions and severe illnesses Hypothyroidism Acute and subacute thyroiditis Use of androgens, dexamethasone, propranolol, salicylates, coumarin derivatives |