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The causes of increase and decrease of free thyroxine
Medical expert of the article
Alexey Kryvenko, medical expert
Last reviewed: 19.10.2021
Last reviewed: 19.10.2021
Diseases and conditions in which the concentration of cT 4 (thyroxine) in the blood serum changes
Increase in concentration
- Hyperthyroidism
- Acute thyroiditis
- Pregnancy
- Obesity
- Hepatitis
- The use of estrogens (oral contraceptives), thyroid drugs, heparin, imidazole derivatives
Reduction in concentration
- Hypofunction of the thyroid gland (myxedema)
- Increased protein loss (kidney syndrome)
- Isenko-Cushing syndrome
- Androgen therapy
- Significant deficiency of iodine
- Exercise stress
- Pangypopituitarism
- Loss of protein through the digestive tract
- The use of glucocorticosteroids, reserpine, sulfonamides, penicillin, potassium iodide
- Resection of the thyroid gland
- Thyroid cancer
- Overdose of thyrostatics