Betalox refers to metoprolol tartrate, used to treat hypertension, angina pectoris and other diseases, the general heart rate of 80 beats / min in the normal range, if the condition requires, you can follow the doctor’s advice to take half a tablet. Metoprolol tartrate is applicable to a wider range, can be used for the treatment of hypertension, angina pectoris, arrhythmia, hypertrophic cardiomyopathy, hyperthyroidism, and so on, and can not be determined by the heart rate at one time whether to take the drug, if the heart rate of 80 beats/minute, there is no other disease, you can not eat, if accompanied by other diseases, it is possible to take. Metoprolol tartrate is used with headache, dizziness and other adverse reactions, and is prohibited for patients with cardiogenic shock and sick sinus syndrome. Note that all medications need to be used under medical supervision, avoid self-medication.