What should I do if thyroxine T4 is high?

Elevated thyroxine (T4) levels require treatment based on specific conditions, such as primary hyperthyroidism or central hyperthyroidism, with options including medication or surgical intervention.

1. Primary Hyperthyroidism

If T4 is elevated along with elevated triiodothyronine (T3), but thyroid-stimulating hormone (TSH) is decreased, the condition is typically caused by intrinsic thyroid gland pathology and is classified as primary hyperthyroidism. Under medical guidance, patients may be treated with medications such as propylthiouracil or methimazole, or undergo radioactive iodine-131 therapy. If these treatments are ineffective, doctors may recommend surgical options such as total thyroidectomy or subtotal thyroidectomy.

2. Central Hyperthyroidism

If T4 and T3 levels are elevated while TSH is normal or slightly elevated, the condition is usually classified as central hyperthyroidism. In such cases, patients may follow their doctor's instructions to take replacement therapy with medications like levothyroxine sodium, or receive treatments such as radioactive iodine-131.

Individuals with elevated T4 levels should seek timely medical evaluation to confirm the diagnosis and actively cooperate with appropriate treatment.