Taking metoprolol tablets, the heart rate of 61 beats/minute at bedtime is normal. It is normal for the heart rate to be slightly lower at bedtime due to the weakening of sympathetic excitability and the inhibitory effect of metoprolol tablets on the corresponding receptors in the heart. The heart rate of a normal person is 60~90 beats/min. Under normal circumstances, the heart rate may increase when the sympathetic nerves are excited (e.g., during exercise or emotional excitement); the heart rate may be low when the sympathetic nerves are inhibited (e.g., during sleep or rest). Metoprolol slows down the heart rate by inhibiting the corresponding receptors in the heart, most of which are clinically used in the treatment of hypertension and secondary prevention of coronary heart disease, but are prohibited in cardiogenic shock, sick sinus node syndrome, etc. The heart rate may be too slow in the process of use, so the heart rate of 61 beats/min before taking Metoprolol tablets at bedtime is normal. There are individual variations in the specific value of heart rate, and for some people dizziness and palpitations (rapid heartbeat, often accompanied by panic) may occur when the heart rate is low. If the heart rate is 61 beats per minute with palpitations, dizziness, chest tightness and other uncomfortable symptoms, you should temporarily stop taking metoprolol tablets, and go to the hospital, under the guidance of the doctor to adjust the use of medication.