Hyperthyroidism is the short form of hyperthyroidism, there is no fixed value for how long it takes to recover from hyperthyroidism with fast heartbeat on medication, and clinically, propranolol is usually required for 2 to 6 weeks to relieve the symptoms of fast heartbeat. The fast heartbeat caused by hyperthyroidism is due to the high level of thyroid hormones in the blood, which leads to a faster heart rate. Hyperthyroidism causing fast heartbeat can be taken orally with beta-blockers, representative drugs such as propranolol and metoprolol, etc. Taking them for 2~6 weeks as prescribed by the doctor can usually relieve the fast heartbeat. In addition, hyperthyroidism should be actively treated with antithyroid medication, iodine 131, and surgery to lower the level of thyroid hormones and relieve the symptoms of hyperthyroidism. It is recommended that patients with a fast heartbeat due to hyperthyroidism seek prompt medical attention.