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The causes of increase and decrease of triiodothyronine

Medical expert of the article

Endocrinologist
, medical expert
Last reviewed: 19.10.2021

Diseases and conditions under which the concentration of triiodothyronine changesin blood serum

Increase in concentration

Reduction in concentration

Thyrotoxicosis

Lack of iodine

Condition after treatment with radioactive iodine preparations

Endemic goiter

Pendred's syndrome

The use of estrogens, oral contraceptives, methadone, heroin

Postoperative conditions and severe diseases

Hypofunction of the thyroid gland

Acute and subacute thyroiditis

The use of androgens, dexamethasone, propranolol, salicylates, coumarin derivatives


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