If the unstable heart rate is caused by organic heart disease, you need to take anti-arrhythmic drugs; if it is caused by other primary diseases, you need to treat the root cause of the disease. 1. Organic heart disease: you can take antiarrhythmic drugs, commonly used sodium channel blockers (such as lidocaine, propafenone, etc.), β-blockers (such as metoprolol, propranolol, etc.), potassium channel blockers (such as amiodarone, etc.), as well as calcium channel blockers (such as verapamil, diltiazem, etc.). 2. Other primary causes: such as hyperthyroidism can be treated with drugs such as Tabazole. Hypothyroidism can be treated with eugenol. The use of medication should be under the guidance of a doctor and should not be used without authorization.