Hyperthyroidism patients taking medication after t3t4 normal tsh low, how long it takes to return to normal varies from person to person, generally when the serum thyroid hormone reaches normal after reducing the amount of treatment to maintain 12 to 18 months, during which time the thyroid function is regularly monitored. The medication cycle for hyperthyroid patients varies from person to person. It takes 4 to 6 weeks for the thyroid hormone stored in the thyroid gland to empty, and 4 to 8 weeks for hyperthyroidism symptoms to be controlled. The dosage is usually reduced when the serum thyroid hormone reaches normal and maintained for 12 to 18 months. Patients with hyperthyroidism who do not respond well to antithyroid medication may choose radioactive iodine or surgery. During the medication period of hyperthyroid patients, thyroid function needs to be monitored, generally every 4 weeks during the treatment period and every 2 months during the maintenance period. Patients with hyperthyroidism should receive regular treatment under the guidance of a doctor, and should not stop or reduce the dosage without authorization.