Patients with hyperthyroidism who experience a fast heartbeat can take beta blockers, the representative drug is propranolol. The main reason why hyperthyroid patients experience a fast heartbeat is the positive effect of too much thyroid hormone in the blood on the heart, so it can lead to an increase in the heart rate of the patient. The basic therapeutic drugs are antithyroid drugs, more commonly used is methimazole and propylthiouracil, as symptomatic treatment of the symptoms of the drug can be selected beta-blocker, the clinical use of propranolol is often used to improve the symptoms of tachycardia. Different patients have different responses to drugs, so the dose of beta-blockers, but also according to different patients to develop different treatment programs. Therefore, for hyperthyroidism with fast heartbeat, oral antithyroid drugs as well as beta blockers can be added to relieve the symptoms.