The generic name of Betalock is Metoprolol Tartrate, and the heart rate of 75 beats/minute is normal after taking it. The fluctuation range of heart rate per minute is 60~100 beats/min in normal adults in quiet state, while metoprolol tartrate belongs to beta receptor antagonist, which is mainly used in the treatment of hypertension, acute myocardial infarction, unstable angina, heart failure and other diseases. Usually the drug may lead to sinus bradycardia after taking, and after taking the heart rate of 75 beats / min, belongs to the normal fluctuation range of the heart rate, this is a normal situation, do not need to carry out special treatment, continue to comply with the doctor’s instructions to take the drug treatment can be. Secondly, the use of the drug may also cause nausea, vomiting, fatigue, dizziness, sleep disorders and other discomforts; for cardiogenic shock, uncompensated cardiac insufficiency is prohibited; in the process of using the drug also need to monitor the liver and kidney function, and for athletes, drivers, elderly patients and other special groups, need to be guided by a doctor to use the drug. All of the above medications should be used under the guidance of a doctor, avoid self-medication, in order to avoid adverse consequences.