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Effects and efficacy:
Used to treat various arrhythmias caused by sympathetic nerve excitation or excessive catecholamine levels, such as arrhythmias caused by pheochromocytoma (combined use of α receptor antagonists can prevent hypertensive crisis), atrial and ventricular premature contractions, sinus and paroxysmal supraventricular tachycardia, and atrial fibrillation. For the treatment of hypertension, larger doses can also be used for ischemic heart disease (angina pectoris). For the treatment of hypertrophic subaortic stenosis. When antimony poisoning causes arrhythmias, this product can also be tried when other drugs are ineffective. It can be used for hyperthyroidism and control symptoms caused by sympathetic overactivity (including anxiety and tremor).

Usage and dosage:
For various arrhythmias: 10-30 mg per day, divided into 3 times, and the dosage is adjusted in time according to changes in heart rhythm, heart rate and blood pressure. Please follow the doctor’s advice for details. For pheochromocytoma: Take the medicine 3 days before surgery, 60 mg per day, divided into 3 times. Please follow the doctor’s advice for details. For angina pectoris: 40-80 mg per day, divided into 3-4 doses, start with a small dose, gradually increase the dose to 80 mg or more per day. Too small a dose is often ineffective. Please follow the doctor’s advice for details. For hypertension: 5 mg each time, 4 times a day, increase 1/4 of the dose after 1-2 weeks, and gradually increase to 100 mg per day under close observation. Please follow the doctor’s advice for details. Intravenous drip: It should be used with caution. For arrhythmias during anesthesia, intravenous drip at a rate of 1 mg per minute, 2.5-5 mg per time, diluted in 5%-10% glucose solution 100 ml drip. Please follow the doctor’s advice for details. During the drip process, blood pressure, heart rhythm and heart rate changes must be closely observed, and the drip rate should be adjusted at any time. If the heart rate slows down, the drug should be stopped immediately.

Adverse reactions:
Drug use may cause fatigue, drowsiness, dizziness, insomnia, nausea, abdominal distension, rash, syncope, hypotension, bradycardia and other adverse reactions.

Contraindicated if allergic to this product Use with caution during pregnancy Use with caution during lactation Use with caution for athletes Use with caution for patients with liver and kidney dysfunction