Hyperthyroidism is the short form of hyperthyroidism, and hyperthyroid patients usually take propranolol hydrochloride tablets 3 to 4 times a day. The use of propranolol in patients with hyperthyroidism is mainly to block the excitatory effect of thyroid hormone on the heart, block the conversion of thyroxine to triiodothyronine in peripheral tissues, and control the symptoms of hyperthyroidism, usually 10~40mg per day every 6~8 hours. 2~6 weeks to stop the drug. However, when used for hyperthyroidism crisis, 60~80mg per day, every 4 hours. The indications for propranolol, besides hyperthyroidism, are hypertension, exertional angina, pheochromocytoma, and ventricular arrhythmias. Its contraindications are bronchial asthma, cardiogenic shock, sinus bradycardia, and acute heart failure. Adverse reactions include vertigo, slow heart rate, nausea, dizziness, rash and so on. Propranolol Hydrochloride Tablets should always be used under medical supervision.