Betalucil is also known as metoprolol, quarter tablets also have a certain therapeutic effect, but the specific dosage of medication need to follow the doctor’s instructions, not unauthorized reduction of medication and discontinuation of medication. Metoprolol is a beta-blocker, and its pharmacological effects include lowering blood pressure and slowing down the heart rate, which is used to treat hypertension, myocardial infarction, angina pectoris, arrhythmia, hypertrophic cardiomyopathy, hyperthyroidism and other diseases. Quarter of a tablet of metoprolol can also play a slight effect of lowering blood pressure and slowing the heart rate, but the use of medication should be used in accordance with the doctor’s instructions, can not be unauthorized reduction or discontinuation of medication, the emergence of headache, abdominal pain, nausea, and other adverse reactions recommended to consult a doctor, drug allergy, severe peripheral vascular disease, sick sinus node syndrome and cardiogenic shock is prohibited.